shithub: femtolisp

Download patch

ref: a9a81aed1f002597ceaa01fa7e2d7ae127e2b9b7
parent: d9d5b07e060c0c53f17a1428566049f6b1123f3c
author: Sigrid Solveig Haflínudóttir <[email protected]>
date: Wed Mar 29 08:00:15 EDT 2023

keep current function/builtin name around to remove fname passing around everywhere

--- a/builtins.c
+++ b/builtins.c
@@ -34,7 +34,7 @@
             pcdr = &c->cdr;
         }
         else if (lst != FL_NIL) {
-            type_error("nconc", "cons", lst);
+            type_error("cons", lst);
         }
     }
     *pcdr = lst;
@@ -43,7 +43,7 @@
 
 BUILTIN("assq", assq)
 {
-    argcount("assq", nargs, 2);
+    argcount(nargs, 2);
     value_t item = args[0];
     value_t v = args[1];
     value_t bind;
@@ -61,7 +61,7 @@
 {
     value_t v;
     cons_t *c;
-    argcount("memq", nargs, 2);
+    argcount(nargs, 2);
     for (v = args[1]; iscons(v); v = c->cdr) {
         if ((c = ptr(v))->car == args[0])
             return v;
@@ -71,7 +71,7 @@
 
 BUILTIN("length", length)
 {
-    argcount("length", nargs, 1);
+    argcount(nargs, 1);
     value_t a = args[0];
     cvalue_t *cv;
     if (isvector(a)) {
@@ -95,12 +95,12 @@
     else if (iscons(a)) {
         return fixnum(llength(a));
     }
-    type_error("length", "sequence", a);
+    type_error("sequence", a);
 }
 
 BUILTIN("raise", raise)
 {
-    argcount("raise", nargs, 1);
+    argcount(nargs, 1);
     fl_raise(args[0]);
 }
 
@@ -107,7 +107,7 @@
 BUILTIN("exit", exit)
 {
     if (nargs > 0)
-        exit(tofixnum(args[0], "exit"));
+        exit(tofixnum(args[0]));
     exit(0);
     return FL_NIL;
 }
@@ -114,15 +114,15 @@
 
 BUILTIN("symbol", symbol)
 {
-    argcount("symbol", nargs, 1);
+    argcount(nargs, 1);
     if (!fl_isstring(args[0]))
-        type_error("symbol", "string", args[0]);
+        type_error("string", args[0]);
     return symbol(cvalue_data(args[0]));
 }
 
 BUILTIN("keyword?", keywordp)
 {
-    argcount("keyword?", nargs, 1);
+    argcount(nargs, 1);
     return (issymbol(args[0]) &&
             iskeyword((symbol_t*)ptr(args[0]))) ? FL_T : FL_F;
 }
@@ -129,8 +129,8 @@
 
 BUILTIN("top-level-value", top_level_value)
 {
-    argcount("top-level-value", nargs, 1);
-    symbol_t *sym = tosymbol(args[0], "top-level-value");
+    argcount(nargs, 1);
+    symbol_t *sym = tosymbol(args[0]);
     if (sym->binding == UNBOUND)
         fl_raise(fl_list2(UnboundError, args[0]));
     return sym->binding;
@@ -138,8 +138,8 @@
 
 BUILTIN("set-top-level-value!", set_top_level_value)
 {
-    argcount("set-top-level-value!", nargs, 2);
-    symbol_t *sym = tosymbol(args[0], "set-top-level-value!");
+    argcount(nargs, 2);
+    symbol_t *sym = tosymbol(args[0]);
     if (!isconstant(sym))
         sym->binding = args[1];
     return args[1];
@@ -161,7 +161,7 @@
 BUILTIN("environment", environment)
 {
     USED(args);
-    argcount("environment", nargs, 0);
+    argcount(nargs, 0);
     value_t lst = FL_NIL;
     fl_gc_handle(&lst);
     global_env_list(symtab, &lst);
@@ -173,7 +173,7 @@
 
 BUILTIN("constant?", constantp)
 {
-    argcount("constant?", nargs, 1);
+    argcount(nargs, 1);
     if (issymbol(args[0]))
         return (isconstant((symbol_t*)ptr(args[0])) ? FL_T : FL_F);
     if (iscons(args[0])) {
@@ -186,7 +186,7 @@
 
 BUILTIN("integer-valued?", integer_valuedp)
 {
-    argcount("integer-valued?", nargs, 1);
+    argcount(nargs, 1);
     value_t v = args[0];
     if (isfixnum(v)) {
         return FL_T;
@@ -215,7 +215,7 @@
 
 BUILTIN("integer?", integerp)
 {
-    argcount("integer?", nargs, 1);
+    argcount(nargs, 1);
     value_t v = args[0];
     return (isfixnum(v) ||
             (iscprim(v) && cp_numtype((cprim_t*)ptr(v)) < T_FLOAT)) ?
@@ -224,7 +224,7 @@
 
 BUILTIN("fixnum", fixnum)
 {
-    argcount("fixnum", nargs, 1);
+    argcount(nargs, 1);
     if (isfixnum(args[0])) {
         return args[0];
     }
@@ -232,7 +232,7 @@
         cprim_t *cp = (cprim_t*)ptr(args[0]);
         return fixnum(conv_to_long(cp_data(cp), cp_numtype(cp)));
     }
-    type_error("fixnum", "number", args[0]);
+    type_error("number", args[0]);
 }
 
 double trunc(double x);
@@ -239,7 +239,7 @@
 
 BUILTIN("truncate", truncate)
 {
-    argcount("truncate", nargs, 1);
+    argcount(nargs, 1);
     if (isfixnum(args[0]))
         return args[0];
     if (iscprim(args[0])) {
@@ -263,7 +263,7 @@
             return args[0];
         return return_from_int64((int64_t)d);
     }
-    type_error("truncate", "number", args[0]);
+    type_error("number", args[0]);
 }
 
 BUILTIN("vector.alloc", vector_alloc)
@@ -271,10 +271,10 @@
     fixnum_t i;
     value_t f, v;
     if (nargs == 0)
-        lerrorf(ArgError, "vector.alloc: too few arguments");
-    i = (fixnum_t)toulong(args[0], "vector.alloc");
+        lerrorf(ArgError, "too few arguments");
+    i = (fixnum_t)toulong(args[0]);
     if (i < 0)
-        lerrorf(ArgError, "vector.alloc: invalid size");
+        lerrorf(ArgError, "invalid size");
     v = alloc_vector((unsigned)i, 0);
     if (nargs == 2)
         f = args[1];
@@ -288,12 +288,12 @@
 
 BUILTIN("time.now", time_now)
 {
-    argcount("time.now", nargs, 0);
+    argcount(nargs, 0);
     USED(args);
     return mk_double(clock_now());
 }
 
-static double todouble(value_t a, char *fname)
+static double todouble(value_t a)
 {
     if (isfixnum(a))
         return (double)numval(a);
@@ -302,13 +302,13 @@
         numerictype_t nt = cp_numtype(cp);
         return conv_to_double(cp_data(cp), nt);
     }
-    type_error(fname, "number", a);
+    type_error("number", a);
 }
 
 BUILTIN("time.string", time_string)
 {
-    argcount("time.string", nargs, 1);
-    double t = todouble(args[0], "time.string");
+    argcount(nargs, 1);
+    double t = todouble(args[0]);
     char buf[64];
     timestring(t, buf, sizeof(buf));
     return string_from_cstr(buf);
@@ -316,8 +316,8 @@
 
 BUILTIN("time.fromstring", time_fromstring)
 {
-    argcount("time.fromstring", nargs, 1);
-    char *ptr = tostring(args[0], "time.fromstring");
+    argcount(nargs, 1);
+    char *ptr = tostring(args[0]);
     double t = parsetime(ptr);
     int64_t it = (int64_t)t;
     if ((double)it == t && fits_fixnum(it))
@@ -328,29 +328,29 @@
 BUILTIN("path.cwd", path_cwd)
 {
     if (nargs > 1)
-        argcount("path.cwd", nargs, 1);
+        argcount(nargs, 1);
     if (nargs == 0) {
         char buf[1024];
         getcwd(buf, sizeof(buf));
         return string_from_cstr(buf);
     }
-    char *ptr = tostring(args[0], "path.cwd");
+    char *ptr = tostring(args[0]);
     if (chdir(ptr))
-        lerrorf(IOError, "path.cwd: could not cd to %s", ptr);
+        lerrorf(IOError, "could not cd to %s", ptr);
     return FL_T;
 }
 
 BUILTIN("path.exists?", path_existsp)
 {
-    argcount("path.exists?", nargs, 1);
-    char *path = tostring(args[0], "path.exists?");
+    argcount(nargs, 1);
+    char *path = tostring(args[0]);
     return access(path, F_OK) == 0 ? FL_T : FL_F;
 }
 
 BUILTIN("os.getenv", os_getenv)
 {
-    argcount("os.getenv", nargs, 1);
-    char *name = tostring(args[0], "os.getenv");
+    argcount(nargs, 1);
+    char *name = tostring(args[0]);
     char *val = getenv(name);
     if (val == nil) return FL_F;
     if (*val == 0)
@@ -360,18 +360,18 @@
 
 BUILTIN("os.setenv", os_setenv)
 {
-    argcount("os.setenv", nargs, 2);
-    char *name = tostring(args[0], "os.setenv");
+    argcount(nargs, 2);
+    char *name = tostring(args[0]);
     int result;
     if (args[1] == FL_F) {
         result = unsetenv(name);
     }
     else {
-        char *val = tostring(args[1], "os.setenv");
+        char *val = tostring(args[1]);
         result = setenv(name, val, 1);
     }
     if (result != 0)
-        lerrorf(ArgError, "os.setenv: invalid environment variable");
+        lerrorf(ArgError, "invalid environment variable");
     return FL_T;
 }
 
@@ -413,17 +413,17 @@
     return mk_float(rand_float());
 }
 
-#define BUILTIN_(lname, cname)                                    \
-BUILTIN(lname, cname)                                     \
+#define BUILTIN_(lname, cname)                                  \
+BUILTIN(lname, cname)                                           \
 {                                                               \
-    argcount(lname, nargs, 1);                                  \
+    argcount(nargs, 1);                                         \
     if (iscprim(args[0])) {                                     \
         cprim_t *cp = (cprim_t*)ptr(args[0]);                   \
         numerictype_t nt = cp_numtype(cp);                      \
         if (nt == T_FLOAT)                                      \
-            return mk_float(cname##f(*(float*)cp_data(cp)));     \
+            return mk_float(cname##f(*(float*)cp_data(cp)));    \
     }                                                           \
-    return mk_double(cname(todouble(args[0], lname)));           \
+    return mk_double(cname(todouble(args[0])));                 \
 }
 
 BUILTIN_("sqrt", sqrt)
--- a/cvalues.c
+++ b/cvalues.c
@@ -272,7 +272,7 @@
     value_t cp = cprim(typenam##type, sizeof(ctype));                   \
     if (cvalue_##ctype##_init(typenam##type,                            \
                               args[0], cp_data((cprim_t*)ptr(cp))))     \
-        type_error(#typenam, "number", args[0]);                        \
+        type_error("number", args[0]);                        \
     return cp;                                                          \
 }
 
@@ -316,7 +316,7 @@
     return mk_ulong(sz);
 }
 
-size_t toulong(value_t n, char *fname)
+size_t toulong(value_t n)
 {
     if (isfixnum(n))
         return numval(n);
@@ -324,10 +324,10 @@
         cprim_t *cp = (cprim_t*)ptr(n);
         return conv_to_ulong(cp_data(cp), cp_numtype(cp));
     }
-    type_error(fname, "number", n);
+    type_error("number", n);
 }
 
-off_t tooffset(value_t n, char *fname)
+off_t tooffset(value_t n)
 {
     if (isfixnum(n))
         return numval(n);
@@ -335,7 +335,7 @@
         cprim_t *cp = (cprim_t*)ptr(n);
         return conv_to_int64(cp_data(cp), cp_numtype(cp));
     }
-    type_error(fname, "number", n);
+    type_error("number", n);
 }
 
 static int cvalue_enum_init(fltype_t *ft, value_t arg, void *dest)
@@ -346,7 +346,7 @@
 
     syms = car(cdr(type));
     if (!isvector(syms))
-        type_error("enum", "vector", syms);
+        type_error("vector", syms);
     if (issymbol(arg)) {
         for(n=0; n < (int)vector_size(syms); n++) {
             if (vector_elt(syms, n) == arg) {
@@ -364,7 +364,7 @@
         n = conv_to_int32(cp_data(cp), cp_numtype(cp));
     }
     else {
-        type_error("enum", "number", arg);
+        type_error("number", arg);
     }
     if ((unsigned)n >= vector_size(syms))
         lerrorf(ArgError, "enum: value out of range");
@@ -374,7 +374,7 @@
 
 BUILTIN("enum", enum)
 {
-    argcount("enum", nargs, 2);
+    argcount(nargs, 2);
     value_t type = fl_list2(enumsym, args[0]);
     fltype_t *ft = get_type(type);
     value_t cv = cvalue(ft, sizeof(int32_t));
@@ -410,9 +410,9 @@
     cnt = predict_arraylen(arg);
 
     if (iscons(cdr_(cdr_(type)))) {
-        size_t tc = toulong(car_(cdr_(cdr_(type))), "array");
+        size_t tc = toulong(car_(cdr_(cdr_(type))));
         if (tc != cnt)
-            lerrorf(ArgError, "array: size mismatch");
+            lerrorf(ArgError, "size mismatch");
     }
 
     sz = elsize * cnt;
@@ -458,7 +458,7 @@
     if (cnt == 1)
         cvalue_init(eltype, arg, dest);
     else
-        type_error("array", "sequence", arg);
+        type_error("sequence", arg);
     return 0;
 }
 
@@ -469,7 +469,7 @@
     int i;
 
     if (nargs < 1)
-        argcount("array", nargs, 1);
+        argcount(nargs, 1);
 
     cnt = nargs - 1;
     fltype_t *type = get_array_type(args[0]);
@@ -555,7 +555,7 @@
             if (!iscons(cdr_(cdr_(type))))
                 lerrorf(ArgError, "sizeof: incomplete type");
             value_t n = car_(cdr_(cdr_(type)));
-            size_t sz = toulong(n, "sizeof");
+            size_t sz = toulong(n);
             return sz * ctype_sizeof(t, palign);
         }
         else if (hed == structsym) {
@@ -576,7 +576,7 @@
 extern fltype_t *iostreamtype;
 
 // get pointer and size for any plain-old-data value
-void to_sized_ptr(value_t v, char *fname, char **pdata, size_t *psz)
+void to_sized_ptr(value_t v, char **pdata, size_t *psz)
 {
     if (iscvalue(v)) {
         cvalue_t *pcv = (cvalue_t*)ptr(v);
@@ -598,24 +598,24 @@
         *psz = cp_class(pcp)->size;
         return;
     }
-    type_error(fname, "plain-old-data", v);
+    type_error("plain-old-data", v);
 }
 
 BUILTIN("sizeof", sizeof)
 {
-    argcount("sizeof", nargs, 1);
+    argcount(nargs, 1);
     if (issymbol(args[0]) || iscons(args[0])) {
         int a;
         return size_wrap(ctype_sizeof(args[0], &a));
     }
     size_t n; char *data;
-    to_sized_ptr(args[0], "sizeof", &data, &n);
+    to_sized_ptr(args[0], &data, &n);
     return size_wrap(n);
 }
 
 BUILTIN("typeof", typeof)
 {
-    argcount("typeof", nargs, 1);
+    argcount(nargs, 1);
     switch(tag(args[0])) {
     case TAG_CONS: return pairsym;
     case TAG_NUM1:
@@ -685,7 +685,7 @@
 
 BUILTIN("copy", copy)
 {
-    argcount("copy", nargs, 1);
+    argcount(nargs, 1);
     if (iscons(args[0]) || isvector(args[0]))
         lerrorf(ArgError, "copy: argument must be a leaf atom");
     if (!iscvalue(args[0]))
@@ -697,7 +697,7 @@
 
 BUILTIN("plain-old-data?", plain_old_datap)
 {
-    argcount("plain-old-data?", nargs, 1);
+    argcount(nargs, 1);
     return (iscprim(args[0]) ||
             (iscvalue(args[0]) && cv_isPOD((cvalue_t*)ptr(args[0])))) ?
         FL_T : FL_F;
@@ -720,7 +720,7 @@
 BUILTIN("c-value", c_value)
 {
     if (nargs < 1 || nargs > 2)
-        argcount("c-value", nargs, 2);
+        argcount(nargs, 2);
     value_t type = args[0];
     fltype_t *ft = get_type(type);
     value_t cv;
@@ -730,7 +730,7 @@
         size_t cnt;
 
         if (iscons(cdr_(cdr_(type))))
-            cnt = toulong(car_(cdr_(cdr_(type))), "array");
+            cnt = toulong(car_(cdr_(cdr_(type))));
         else if (nargs == 2)
             cnt = predict_arraylen(args[1]);
         else
@@ -767,7 +767,7 @@
     return fixnum(diff);
 }
 
-static void check_addr_args(char *fname, value_t arr, value_t ind,
+static void check_addr_args(value_t arr, value_t ind,
                             char **data, int *index)
 {
     int numel;
@@ -774,9 +774,9 @@
     cvalue_t *cv = (cvalue_t*)ptr(arr);
     *data = cv_data(cv);
     numel = cv_len(cv)/(cv_class(cv)->elsz);
-    *index = toulong(ind, fname);
+    *index = toulong(ind);
     if (*index >= numel)
-        bounds_error(fname, arr, ind);
+        bounds_error(arr, ind);
 }
 
 static value_t cvalue_array_aref(value_t *args)
@@ -787,7 +787,7 @@
     numerictype_t nt = eltype->numtype;
     if (nt >= T_INT32)
         el = cvalue(eltype, eltype->size);
-    check_addr_args("aref", args[0], args[1], &data, &index);
+    check_addr_args(args[0], args[1], &data, &index);
     if (nt < T_INT32) {
         if (nt == T_INT8)
             return fixnum((int8_t)data[index]);
@@ -816,7 +816,7 @@
 {
     char *data; int index;
     fltype_t *eltype = cv_class((cvalue_t*)ptr(args[0]))->eltype;
-    check_addr_args("aset!", args[0], args[1], &data, &index);
+    check_addr_args(args[0], args[1], &data, &index);
     char *dest = data + index*eltype->size;
     cvalue_init(eltype, args[2], dest);
     return args[2];
@@ -824,11 +824,11 @@
 
 BUILTIN("builtin", builtin)
 {
-    argcount("builtin", nargs, 1);
-    symbol_t *name = tosymbol(args[0], "builtin");
+    argcount(nargs, 1);
+    symbol_t *name = tosymbol(args[0]);
     cvalue_t *cv;
     if (ismanaged(args[0]) || (cv=name->dlcache) == nil)
-        lerrorf(ArgError, "builtin: function %s not found", name->name);
+        lerrorf(ArgError, "function %s not found", name->name);
     return tagptr(cv, TAG_CVALUE);
 }
 
@@ -835,7 +835,7 @@
 value_t cbuiltin(char *name, builtin_t f)
 {
     cvalue_t *cv;
-    cv = malloc(CVALUE_NWORDS * sizeof(*cv));
+    cv = calloc(CVALUE_NWORDS, sizeof(*cv));
     cv->type = builtintype;
     cv->data = &cv->_space[0];
     cv->len = sizeof(value_t);
@@ -946,7 +946,7 @@
             continue;
         }
     add_type_error:
-        type_error("+", "number", arg);
+        type_error("number", arg);
     }
     if (inexact) {
         Faccum += Uaccum;
@@ -1015,7 +1015,7 @@
             break;
         }
     }
-    type_error("-", "number", n);
+    type_error("number", n);
 }
 
 static value_t fl_mul_any(value_t *args, uint32_t nargs, int64_t Saccum)
@@ -1058,7 +1058,7 @@
             continue;
         }
     mul_type_error:
-        type_error("*", "number", arg);
+        type_error("number", arg);
     }
     if (inexact) {
         Faccum *= Uaccum;
@@ -1106,9 +1106,9 @@
   eqnans: NaNs considered equal to each other
           -0.0 not considered equal to 0.0
           inexact not considered equal to exact
-  fname: if not nil, throws type errors, else returns 2 for type errors
+  typeerr: if not 0, throws type errors, else returns 2 for type errors
 */
-int numeric_compare(value_t a, value_t b, int eq, int eqnans, char *fname)
+int numeric_compare(value_t a, value_t b, int eq, int eqnans, int typeerr)
 {
     lltint_t ai, bi;
     numerictype_t ta, tb;
@@ -1120,10 +1120,16 @@
         return 1;
     }
     if (!num_to_ptr(a, &ai, &ta, &aptr)) {
-        if (fname) type_error(fname, "number", a); else return 2;
+        if (typeerr)
+            type_error("number", a);
+        else
+            return 2;
     }
     if (!num_to_ptr(b, &bi, &tb, &bptr)) {
-        if (fname) type_error(fname, "number", b); else return 2;
+        if (typeerr)
+            type_error("number", b);
+        else
+            return 2;
     }
     if (eq && eqnans && ((ta >= T_FLOAT) != (tb >= T_FLOAT)))
         return 1;
@@ -1148,9 +1154,9 @@
     void *aptr, *bptr;
 
     if (!num_to_ptr(a, &ai, &ta, &aptr))
-        type_error("/", "number", a);
+        type_error("number", a);
     if (!num_to_ptr(b, &bi, &tb, &bptr))
-        type_error("/", "number", b);
+        type_error("number", b);
 
     da = conv_to_double(aptr, ta);
     db = conv_to_double(bptr, tb);
@@ -1173,9 +1179,9 @@
     int64_t a64, b64;
 
     if (!num_to_ptr(a, &ai, &ta, &aptr))
-        type_error("div0", "number", a);
+        type_error("number", a);
     if (!num_to_ptr(b, &bi, &tb, &bptr))
-        type_error("div0", "number", b);
+        type_error("number", b);
 
     if (ta == T_UINT64) {
         if (tb == T_UINT64) {
@@ -1209,7 +1215,7 @@
     DivideByZeroError();
 }
 
-static value_t fl_bitwise_op(value_t a, value_t b, int opcode, char *fname)
+static value_t fl_bitwise_op(value_t a, value_t b, int opcode)
 {
     lltint_t ai, bi;
     numerictype_t ta, tb, itmp;
@@ -1217,9 +1223,9 @@
     int64_t b64;
 
     if (!num_to_ptr(a, &ai, &ta, &aptr) || ta >= T_FLOAT)
-        type_error(fname, "integer", a);
+        type_error("integer", a);
     if (!num_to_ptr(b, &bi, &tb, &bptr) || tb >= T_FLOAT)
-        type_error(fname, "integer", b);
+        type_error("integer", b);
 
     if (ta < tb) {
         itmp = ta; ta = tb; tb = itmp;
@@ -1285,7 +1291,7 @@
         if (bothfixnums(v, e))
             v = v & e;
         else
-            v = fl_bitwise_op(v, e, 0, "logand");
+            v = fl_bitwise_op(v, e, 0);
     }
     return v;
 }
@@ -1301,7 +1307,7 @@
         if (bothfixnums(v, e))
             v = v | e;
         else
-            v = fl_bitwise_op(v, e, 1, "logior");
+            v = fl_bitwise_op(v, e, 1);
     }
     return v;
 }
@@ -1317,7 +1323,7 @@
         if (bothfixnums(v, e))
             v = fixnum(numval(v) ^ numval(e));
         else
-            v = fl_bitwise_op(v, e, 2, "logxor");
+            v = fl_bitwise_op(v, e, 2);
     }
     return v;
 }
@@ -1324,7 +1330,7 @@
 
 BUILTIN("lognot", lognot)
 {
-    argcount("lognot", nargs, 1);
+    argcount(nargs, 1);
     value_t a = args[0];
     if (isfixnum(a))
         return fixnum(~numval(a));
@@ -1347,7 +1353,7 @@
         case T_UINT64: return mk_uint64(~*(uint64_t*)aptr);
         }
     }
-    type_error("lognot", "integer", a);
+    type_error("integer", a);
 }
 
 BUILTIN("ash", ash)
@@ -1354,9 +1360,9 @@
 {
     fixnum_t n;
     int64_t accum;
-    argcount("ash", nargs, 2);
+    argcount(nargs, 2);
     value_t a = args[0];
-    n = tofixnum(args[1], "ash");
+    n = tofixnum(args[1]);
     if (isfixnum(a)) {
         if (n <= 0)
             return fixnum(numval(a)>>(-n));
@@ -1396,7 +1402,7 @@
             }
         }
     }
-    type_error("ash", "integer", a);
+    type_error("integer", a);
 }
 
 static void cvalues_init(void)
--- a/equal.c
+++ b/equal.c
@@ -72,7 +72,7 @@
         if (iscprim(b)) {
             if (cp_class((cprim_t*)ptr(b)) == wchartype)
                 return fixnum(1);
-            return fixnum(numeric_compare(a, b, eq, 1, nil));
+            return fixnum(numeric_compare(a, b, eq, 1, 0));
         }
         return fixnum(-1);
     case TAG_SYM:
@@ -92,7 +92,7 @@
         else if (iscprim(b) && cp_class((cprim_t*)ptr(b)) == wchartype) {
             return fixnum(1);
         }
-        c = numeric_compare(a, b, eq, 1, nil);
+        c = numeric_compare(a, b, eq, 1, 0);
         if (c != 2)
             return fixnum(c);
         break;
@@ -386,6 +386,6 @@
 
 BUILTIN("hash", hash)
 {
-    argcount("hash", nargs, 1);
+    argcount(nargs, 1);
     return fixnum(hash_lispvalue(args[0]));
 }
--- a/flisp.c
+++ b/flisp.c
@@ -29,6 +29,7 @@
 static value_t *Stack;
 static uint32_t SP = 0;
 static uint32_t curr_frame = 0;
+static char *curr_fname = nil;
 #define PUSH(v) (Stack[SP++] = (v))
 #define POP()   (Stack[--SP])
 #define POPN(n) (SP-=(n))
@@ -133,8 +134,17 @@
 
 static value_t make_error_msg(char *format, va_list args)
 {
-    char msgbuf[512];
-    vsnprintf(msgbuf, sizeof(msgbuf), format, args);
+    char msgbuf[512], *s;
+    int n;
+    if (curr_fname != nil) {
+        n = snprintf(msgbuf, sizeof(msgbuf), "%s: ", curr_fname);
+        curr_fname = nil;
+    } else {
+        n = 0;
+    }
+    s = msgbuf + n;
+    n = sizeof(msgbuf) - n;
+    vsnprintf(s, n, format, args);
     return string_from_cstr(msgbuf);
 }
 
@@ -150,25 +160,25 @@
     fl_raise(fl_list2(e, msg));
 }
 
-_Noreturn void type_error(char *fname, char *expected, value_t got)
+_Noreturn void type_error(char *expected, value_t got)
 {
-    fl_raise(fl_listn(4, TypeError, symbol(fname), symbol(expected), got));
+    fl_raise(fl_listn(4, TypeError, symbol(curr_fname), symbol(expected), got));
 }
 
-_Noreturn void bounds_error(char *fname, value_t arr, value_t ind)
+_Noreturn void bounds_error(value_t arr, value_t ind)
 {
-    fl_raise(fl_listn(4, BoundsError, symbol(fname), arr, ind));
+    fl_raise(fl_listn(4, BoundsError, symbol(curr_fname), arr, ind));
 }
 
 // safe cast operators --------------------------------------------------------
 
 #define isstring fl_isstring
-#define SAFECAST_OP(type,ctype,cnvt)                                          \
-ctype to##type(value_t v, char *fname)                                        \
-{                                                                             \
-    if (is##type(v))                                                          \
-        return (ctype)cnvt(v);                                                \
-    type_error(fname, #type, v);                                              \
+#define SAFECAST_OP(type,ctype,cnvt)                             \
+ctype to##type(value_t v)                                        \
+{                                                                \
+    if (is##type(v))                                             \
+        return (ctype)cnvt(v);                                   \
+    type_error(#type, v);                                        \
 }
 SAFECAST_OP(cons,  cons_t*,  ptr)
 SAFECAST_OP(symbol,symbol_t*,ptr)
@@ -240,7 +250,7 @@
 static int gsnameno=0;
 BUILTIN("gensym", gensym)
 {
-    argcount("gensym", nargs, 0);
+    argcount(nargs, 0);
     USED(args);
     gensym_t *gs = (gensym_t*)alloc_words(sizeof(gensym_t)/sizeof(void*));
     gs->id = _gensym_ctr++;
@@ -257,7 +267,7 @@
 
 BUILTIN("gensym?", gensymp)
 {
-    argcount("gensym?", nargs, 1);
+    argcount(nargs, 1);
     return isgensym(args[0]) ? FL_T : FL_F;
 }
 
@@ -560,6 +570,23 @@
 
 // utils ----------------------------------------------------------------------
 
+static char *cvalue_name(value_t v)
+{
+    cvalue_t *cv = (cvalue_t*)ptr(v);
+    static char name[64];
+    value_t label;
+
+    void *data = cptr(v);
+    void *fptr = *(void**)data;
+    label = (value_t)ptrhash_get(&reverse_dlsym_lookup_table, cv);
+    if (label == (value_t)HT_NOTFOUND)
+        snprintf(name, sizeof(name), "#<builtin @%p>", fptr);
+    else
+        snprintf(name, sizeof(name), "#fn(%s)", symbol_name(label));
+    return name;
+}
+
+
 // apply function with n args on the stack
 static value_t _applyn(uint32_t n)
 {
@@ -567,6 +594,7 @@
     uint32_t saveSP = SP;
     value_t v;
     if (iscbuiltin(f)) {
+        curr_fname = cvalue_name(f);
         v = ((builtin_t*)ptr(f))[3](&Stack[SP-n], n);
     }
     else if (isfunction(f)) {
@@ -577,10 +605,11 @@
         if (ptr(tab) == nil)
             lerrorf(UnboundError, "builtins table");
         Stack[SP-n-1] = vector_elt(tab, uintval(f));
+        curr_fname = builtins[uintval(f)].name;
         v = apply_cl(n);
     }
     else {
-        type_error("apply", "function", f);
+        type_error("function", f);
     }
     SP = saveSP;
     return v;
@@ -912,6 +941,8 @@
 
     op = *ip++;
     while(1){
+        if(op < nelem(builtins) && builtins[op].name != nil)
+            curr_fname = builtins[op].name;
         switch (op) {
         OP(OP_LOADA0)
             v = captured ? vector_elt(Stack[bp], 0) : Stack[bp];
@@ -970,6 +1001,8 @@
                         Stack[curr_frame-2] = (uintptr_t)ip;
                     }
                     nargs = n;
+                    function_t *fn = (function_t*)ptr(func);
+                    curr_fname = fn->name == LAMBDA ? "lambda" : symbol_name(fn->name);
                     goto apply_cl_top;
                 }
                 else {
@@ -977,13 +1010,14 @@
                     if (isbuiltin(func)) {
                         s = builtins[i].nargs;
                         if (s >= 0)
-                            argcount(builtins[i].name, n, s);
+                            argcount(n, s);
                         else if (s != ANYARGS && (signed)n < -s)
-                            argcount(builtins[i].name, n, -s);
+                            argcount(n, -s);
                         // remove function arg
                         for(s=SP-n-1; s < (int)SP-1; s++)
                             Stack[s] = Stack[s+1];
                         SP--;
+                        curr_fname = builtins[i].name;
                         switch (i) {
                         case OP_LIST:   goto apply_list;
                         case OP_VECTOR: goto apply_vector;
@@ -1001,12 +1035,13 @@
             }
             else if (iscbuiltin(func)) {
                 s = SP;
+                curr_fname = cvalue_name(func);
                 v = ((builtin_t)(((void**)ptr(func))[3]))(&Stack[SP-n], n);
                 SP = s-n;
                 Stack[SP-1] = v;
                 NEXT_OP;
             }
-            type_error("apply", "function", func);
+            type_error("function", func);
 
         OP(OP_LOADGL)
             v = fn_vals(Stack[bp-1]);
@@ -1073,7 +1108,7 @@
         OP(OP_CAR)
             v = Stack[SP-1];
             if (!iscons(v))
-                type_error("car", "cons", v);
+                type_error("cons", v);
             Stack[SP-1] = car_(v);
             NEXT_OP;
 
@@ -1080,7 +1115,7 @@
         OP(OP_CDR)
             v = Stack[SP-1];
             if (!iscons(v))
-                type_error("cdr", "cons", v);
+                type_error("cons", v);
             Stack[SP-1] = cdr_(v);
             NEXT_OP;
 
@@ -1167,9 +1202,9 @@
             v = Stack[SP-2];
             if (isvector(v)) {
                 e = Stack[SP-1];
-                i = isfixnum(e) ? numval(e) : (uint32_t)toulong(e, "aref");
+                i = isfixnum(e) ? numval(e) : (uint32_t)toulong(e);
                 if ((unsigned)i >= vector_size(v))
-                    bounds_error("aref", v, e);
+                    bounds_error(v, e);
                 v = vector_elt(v, i);
             }
             else if (isarray(v)) {
@@ -1176,7 +1211,7 @@
                 v = cvalue_array_aref(&Stack[SP-2]);
             }
             else {
-                type_error("aref", "sequence", v);
+                type_error("sequence", v);
             }
             POPN(1);
             Stack[SP-1] = v;
@@ -1256,10 +1291,10 @@
         OP(OP_CADR)
             v = Stack[SP-1];
             if (!iscons(v))
-                type_error("cdr", "cons", v);
+                type_error("cons", v);
             v = cdr_(v);
             if (!iscons(v))
-                type_error("car", "cons", v);
+                type_error("cons", v);
             Stack[SP-1] = car_(v);
             NEXT_OP;
 
@@ -1287,7 +1322,7 @@
             NEXT_OP;
 
         OP(OP_BOUNDP)
-            sym = tosymbol(Stack[SP-1], "bound?");
+            sym = tosymbol(Stack[SP-1]);
             Stack[SP-1] = sym->binding == UNBOUND ? FL_F : FL_T;
             NEXT_OP;
 
@@ -1508,7 +1543,7 @@
             if (bothfixnums(v, e))
                 v = v == e ? FL_T : FL_F;
             else
-                v = !numeric_compare(v,e,1,0,"=") ? FL_T : FL_F;
+                v = !numeric_compare(v,e,1,0,1) ? FL_T : FL_F;
             POPN(1);
             Stack[SP-1] = v;
             NEXT_OP;
@@ -1526,7 +1561,7 @@
                 ip += 4;
             }
             if (nargs != n)
-                lerrorf(ArgError, "apply: too %s arguments", nargs > n ? "many" : "few");
+                lerrorf(ArgError, "too %s arguments", nargs > n ? "many" : "few");
             NEXT_OP;
 
         OP(OP_VECTOR)
@@ -1543,9 +1578,9 @@
         OP(OP_ASET)
             e = Stack[SP-3];
             if (isvector(e)) {
-                i = tofixnum(Stack[SP-2], "aset!");
+                i = tofixnum(Stack[SP-2]);
                 if ((unsigned)i >= vector_size(e))
-                    bounds_error("aset!", v, Stack[SP-1]);
+                    bounds_error(v, Stack[SP-1]);
                 vector_elt(e, i) = (v=Stack[SP-1]);
             }
             else if (isarray(e)) {
@@ -1552,7 +1587,7 @@
                 v = cvalue_array_aset(&Stack[SP-3]);
             }
             else {
-                type_error("aset!", "sequence", e);
+                type_error("sequence", e);
             }
             POPN(2);
             Stack[SP-1] = v;
@@ -1559,8 +1594,8 @@
             NEXT_OP;
 
         OP(OP_FOR)
-            s  = tofixnum(Stack[SP-3], "for");
-            hi = tofixnum(Stack[SP-2], "for");
+            s  = tofixnum(Stack[SP-3]);
+            hi = tofixnum(Stack[SP-2]);
             //f = Stack[SP-1];
             v = FL_UNSPECIFIED;
             SP += 2;
@@ -1798,11 +1833,11 @@
     if (nargs == 1 && issymbol(args[0]))
         return fn_builtin_builtin(args, nargs);
     if (nargs < 2 || nargs > 4)
-        argcount("function", nargs, 2);
+        argcount(nargs, 2);
     if (!fl_isstring(args[0]))
-        type_error("function", "string", args[0]);
+        type_error("string", args[0]);
     if (!isvector(args[1]))
-        type_error("function", "vector", args[1]);
+        type_error("vector", args[1]);
     cvalue_t *arr = (cvalue_t*)ptr(args[0]);
     cv_pin(arr);
     char *data = cv_data(arr);
@@ -1838,7 +1873,7 @@
             fn->env = args[2];
             if (nargs > 3) {
                 if (!issymbol(args[3]))
-                    type_error("function", "symbol", args[3]);
+                    type_error("symbol", args[3]);
                 fn->name = args[3];
             }
         }
@@ -1850,36 +1885,36 @@
 
 BUILTIN("function:code", function_code)
 {
-    argcount("function:code", nargs, 1);
+    argcount(nargs, 1);
     value_t v = args[0];
-    if (!isclosure(v)) type_error("function:code", "function", v);
+    if (!isclosure(v)) type_error("function", v);
     return fn_bcode(v);
 }
 BUILTIN("function:vals", function_vals)
 {
-    argcount("function:vals", nargs, 1);
+    argcount(nargs, 1);
     value_t v = args[0];
-    if (!isclosure(v)) type_error("function:vals", "function", v);
+    if (!isclosure(v)) type_error("function", v);
     return fn_vals(v);
 }
 BUILTIN("function:env", function_env)
 {
-    argcount("function:env", nargs, 1);
+    argcount(nargs, 1);
     value_t v = args[0];
-    if (!isclosure(v)) type_error("function:env", "function", v);
+    if (!isclosure(v)) type_error("function", v);
     return fn_env(v);
 }
 BUILTIN("function:name", function_name)
 {
-    argcount("function:name", nargs, 1);
+    argcount(nargs, 1);
     value_t v = args[0];
-    if (!isclosure(v)) type_error("function:name", "function", v);
+    if (!isclosure(v)) type_error("function", v);
     return fn_name(v);
 }
 
 BUILTIN("copy-list", copy_list)
 {
-    argcount("copy-list", nargs, 1);
+    argcount(nargs, 1);
     return copy_list(args[0]);
 }
 
@@ -1903,7 +1938,7 @@
             lastcons = tagptr((((cons_t*)curheap)-1), TAG_CONS);
         }
         else if (lst != NIL) {
-            type_error("append", "cons", lst);
+            type_error("cons", lst);
         }
     }
     if (first == NIL)
@@ -1917,7 +1952,7 @@
 BUILTIN("list*", liststar)
 {
     if (nargs == 1) return args[0];
-    else if (nargs == 0) argcount("list*", nargs, 1);
+    else if (nargs == 0) argcount(nargs, 1);
     return list(args, nargs, 1);
 }
 
@@ -1924,7 +1959,7 @@
 BUILTIN("stacktrace", stacktrace)
 {
     USED(args);
-    argcount("stacktrace", nargs, 0);
+    argcount(nargs, 0);
     return _stacktrace(fl_throwing_frame ? fl_throwing_frame : curr_frame);
 }
 
@@ -2129,6 +2164,7 @@
     PUSH(sys_image_iostream);
     saveSP = SP;
     FL_TRY {
+        curr_fname = "bootstrap";
         while (1) {
             e = fl_read_sexpr(Stack[SP-1]);
             if (ios_eof(value2c(ios_t*,Stack[SP-1]))) break;
@@ -2141,9 +2177,9 @@
             else {
                 // stage 1 format: list alternating symbol/value
                 while (iscons(e)) {
-                    sym = tosymbol(car_(e), "bootstrap");
+                    sym = tosymbol(car_(e));
                     e = cdr_(e);
-                    (void)tocons(e, "bootstrap");
+                    (void)tocons(e);
                     sym->binding = car_(e);
                     e = cdr_(e);
                 }
--- a/flisp.h
+++ b/flisp.h
@@ -110,8 +110,8 @@
 // functions ending in _ are unsafe, faster versions
 #define car_(v) (((cons_t*)ptr(v))->car)
 #define cdr_(v) (((cons_t*)ptr(v))->cdr)
-#define car(v)  (tocons((v),"car")->car)
-#define cdr(v)  (tocons((v),"cdr")->cdr)
+#define car(v)  (tocons((v))->car)
+#define cdr(v)  (tocons((v))->cdr)
 #define fn_bcode(f) (((value_t*)ptr(f))[0])
 #define fn_vals(f) (((value_t*)ptr(f))[1])
 #define fn_env(f) (((value_t*)ptr(f))[2])
@@ -173,10 +173,10 @@
 int isnumtok_base(char *tok, value_t *pval, int base);
 
 /* safe casts */
-cons_t *tocons(value_t v, char *fname);
-symbol_t *tosymbol(value_t v, char *fname);
-fixnum_t tofixnum(value_t v, char *fname);
-char *tostring(value_t v, char *fname);
+cons_t *tocons(value_t v);
+symbol_t *tosymbol(value_t v);
+fixnum_t tofixnum(value_t v);
+char *tostring(value_t v);
 
 /* error handling */
 typedef struct _fl_readstate_t {
@@ -217,16 +217,15 @@
 void fl_savestate(fl_exception_context_t *_ctx);
 void fl_restorestate(fl_exception_context_t *_ctx);
 _Noreturn void fl_raise(value_t e);
-_Noreturn void type_error(char *fname, char *expected, value_t got);
-_Noreturn void bounds_error(char *fname, value_t arr, value_t ind);
+_Noreturn void type_error(char *expected, value_t got);
+_Noreturn void bounds_error(value_t arr, value_t ind);
 extern value_t ArgError, IOError, KeyError, MemoryError, EnumerationError;
 extern value_t UnboundError;
-#define argcount(fname, nargs, c)                         \
+#define argcount(nargs, c)                                \
     do {                                                  \
         if (__unlikely(nargs != c)) {                     \
             lerrorf(ArgError,                             \
-                "%s: too %s arguments (want %d, got %d)", \
-                fname,                                    \
+                "too %s arguments (want %d, got %d)",     \
                 nargs < c ? "few" : "many", c, nargs);    \
         }                                                 \
     } while(0)
@@ -337,8 +336,8 @@
 value_t cbuiltin(char *name, builtin_t f);
 size_t cvalue_arraylen(value_t v);
 value_t size_wrap(size_t sz);
-size_t toulong(value_t n, char *fname);
-off_t tooffset(value_t n, char *fname);
+size_t toulong(value_t n);
+off_t tooffset(value_t n);
 value_t cvalue_string(size_t sz);
 value_t cvalue_static_cstring(const char *str);
 value_t string_from_cstr(char *str);
@@ -346,11 +345,11 @@
 int fl_isstring(value_t v);
 int fl_isnumber(value_t v);
 int fl_isiostream(value_t v);
-ios_t *fl_toiostream(value_t v, char *fname);
+ios_t *fl_toiostream(value_t v);
 value_t cvalue_compare(value_t a, value_t b);
-int numeric_compare(value_t a, value_t b, int eq, int eqnans, char *fname);
+int numeric_compare(value_t a, value_t b, int eq, int eqnans, int typeerr);
 
-void to_sized_ptr(value_t v, char *fname, char **pdata, size_t *psz);
+void to_sized_ptr(value_t v, char **pdata, size_t *psz);
 
 fltype_t *get_type(value_t t);
 fltype_t *get_array_type(value_t eltype);
--- a/iostream.c
+++ b/iostream.c
@@ -36,7 +36,7 @@
 
 BUILTIN("iostream?", iostreamp)
 {
-    argcount("iostream?", nargs, 1);
+    argcount(nargs, 1);
     return fl_isiostream(args[0]) ? FL_T : FL_F;
 }
 
@@ -43,32 +43,32 @@
 BUILTIN("eof-object", eof_object)
 {
     USED(args);
-    argcount("eof-object", nargs, 0);
+    argcount(nargs, 0);
     return FL_EOF;
 }
 
 BUILTIN("eof-object?", eof_objectp)
 {
-    argcount("eof-object?", nargs, 1);
+    argcount(nargs, 1);
     return (FL_EOF == args[0]) ? FL_T : FL_F;
 }
 
-static ios_t *toiostream(value_t v, char *fname)
+static ios_t *toiostream(value_t v)
 {
     if (!fl_isiostream(v))
-        type_error(fname, "iostream", v);
+        type_error("iostream", v);
     return value2c(ios_t*, v);
 }
 
-ios_t *fl_toiostream(value_t v, char *fname)
+ios_t *fl_toiostream(value_t v)
 {
-    return toiostream(v, fname);
+    return toiostream(v);
 }
 
 BUILTIN("file", file)
 {
     if (nargs < 1)
-        argcount("file", nargs, 1);
+        argcount(nargs, 1);
     int i, r=0, w=0, c=0, t=0, a=0;
     for(i=1; i < (int)nargs; i++) {
         if      (args[i] == wrsym)    w = 1;
@@ -79,10 +79,10 @@
     }
     if ((r|w|c|t|a) == 0) r = 1;  // default to reading
     value_t f = cvalue(iostreamtype, sizeof(ios_t));
-    char *fname = tostring(args[0], "file");
+    char *fname = tostring(args[0]);
     ios_t *s = value2c(ios_t*, f);
     if (ios_file(s, fname, r, w, c, t) == nil)
-        lerrorf(IOError, "file: could not open \"%s\"", fname);
+        lerrorf(IOError, "could not open \"%s\"", fname);
     if (a) ios_seek_end(s);
     return f;
 }
@@ -89,12 +89,12 @@
 
 BUILTIN("buffer", buffer)
 {
-    argcount("buffer", nargs, 0);
+    argcount(nargs, 0);
     USED(args);
     value_t f = cvalue(iostreamtype, sizeof(ios_t));
     ios_t *s = value2c(ios_t*, f);
     if (ios_mem(s, 0) == nil)
-        lerrorf(MemoryError, "buffer: could not allocate stream");
+        lerrorf(MemoryError, "could not allocate stream");
     return f;
 }
 
@@ -102,7 +102,7 @@
 {
     value_t arg = 0;
     if (nargs > 1) {
-        argcount("read", nargs, 1);
+        argcount(nargs, 1);
     }
     else if (nargs == 0) {
         arg = symbol_value(instrsym);
@@ -110,7 +110,7 @@
     else {
         arg = args[0];
     }
-    (void)toiostream(arg, "read");
+    (void)toiostream(arg);
     fl_gc_handle(&arg);
     value_t v = fl_read_sexpr(arg);
     fl_free_gc_handles(1);
@@ -121,37 +121,37 @@
 
 BUILTIN("io.getc", io_getc)
 {
-    argcount("io.getc", nargs, 1);
-    ios_t *s = toiostream(args[0], "io.getc");
+    argcount(nargs, 1);
+    ios_t *s = toiostream(args[0]);
     uint32_t wc;
     int res;
     if ((res = ios_getutf8(s, &wc)) == IOS_EOF)
-        //lerrorf(IOError, "io.getc: end of file reached");
+        //lerrorf(IOError, "end of file reached");
         return FL_EOF;
     if (res == 0)
-        lerrorf(IOError, "io.getc: invalid UTF-8 sequence");
+        lerrorf(IOError, "invalid UTF-8 sequence");
     return mk_wchar(wc);
 }
 
 BUILTIN("io.peekc", io_peekc)
 {
-    argcount("io.peekc", nargs, 1);
-    ios_t *s = toiostream(args[0], "io.peekc");
+    argcount(nargs, 1);
+    ios_t *s = toiostream(args[0]);
     uint32_t wc;
     int res;
     if ((res = ios_peekutf8(s, &wc)) == IOS_EOF)
         return FL_EOF;
     if (res == 0)
-        lerrorf(IOError, "io.peekc: invalid UTF-8 sequence");
+        lerrorf(IOError, "invalid UTF-8 sequence");
     return mk_wchar(wc);
 }
 
 BUILTIN("io.putc", io_putc)
 {
-    argcount("io.putc", nargs, 2);
-    ios_t *s = toiostream(args[0], "io.putc");
+    argcount(nargs, 2);
+    ios_t *s = toiostream(args[0]);
     if (!iscprim(args[1]) || ((cprim_t*)ptr(args[1]))->type != wchartype)
-        type_error("io.putc", "wchar", args[1]);
+        type_error("wchar", args[1]);
     uint32_t wc = *(uint32_t*)cp_data((cprim_t*)ptr(args[1]));
     return fixnum(ios_pututf8(s, wc));
 }
@@ -158,9 +158,9 @@
 
 BUILTIN("io.skip", io_skip)
 {
-    argcount("io.skip", nargs, 2);
-    ios_t *s = toiostream(args[0], "io.skip");
-    off_t off = tooffset(args[1], "io.skip");
+    argcount(nargs, 2);
+    ios_t *s = toiostream(args[0]);
+    off_t off = tooffset(args[1]);
     off_t res = ios_skip(s, off);
     if (res < 0)
         return FL_F;
@@ -169,8 +169,8 @@
 
 BUILTIN("io.flush", io_flush)
 {
-    argcount("io.flush", nargs, 1);
-    ios_t *s = toiostream(args[0], "io.flush");
+    argcount(nargs, 1);
+    ios_t *s = toiostream(args[0]);
     if (ios_flush(s) != 0)
         return FL_F;
     return FL_T;
@@ -178,8 +178,8 @@
 
 BUILTIN("io.close", io_close)
 {
-    argcount("io.close", nargs, 1);
-    ios_t *s = toiostream(args[0], "io.close");
+    argcount(nargs, 1);
+    ios_t *s = toiostream(args[0]);
     ios_close(s);
     return FL_T;
 }
@@ -186,8 +186,8 @@
 
 BUILTIN("io.discardbuffer", io_discardbuffer)
 {
-    argcount("io.discardbuffer", nargs, 1);
-    ios_t *s = toiostream(args[0], "io.discardbuffer");
+    argcount(nargs, 1);
+    ios_t *s = toiostream(args[0]);
     ios_purge(s);
     return FL_T;
 }
@@ -194,16 +194,16 @@
 
 BUILTIN("io.eof?", io_eofp)
 {
-    argcount("io.eof?", nargs, 1);
-    ios_t *s = toiostream(args[0], "io.eof?");
+    argcount(nargs, 1);
+    ios_t *s = toiostream(args[0]);
     return (ios_eof(s) ? FL_T : FL_F);
 }
 
 BUILTIN("io.seek", io_seek)
 {
-    argcount("io.seek", nargs, 2);
-    ios_t *s = toiostream(args[0], "io.seek");
-    size_t pos = toulong(args[1], "io.seek");
+    argcount(nargs, 2);
+    ios_t *s = toiostream(args[0]);
+    size_t pos = toulong(args[1]);
     off_t res = ios_seek(s, (off_t)pos);
     if (res == -1)
         return FL_F;
@@ -212,8 +212,8 @@
 
 BUILTIN("io.pos", io_pos)
 {
-    argcount("io.pos", nargs, 1);
-    ios_t *s = toiostream(args[0], "io.pos");
+    argcount(nargs, 1);
+    ios_t *s = toiostream(args[0]);
     off_t res = ios_pos(s);
     if (res == -1)
         return FL_F;
@@ -223,12 +223,12 @@
 BUILTIN("write", write)
 {
     if (nargs < 1 || nargs > 2)
-        argcount("write", nargs, 1);
+        argcount(nargs, 1);
     ios_t *s;
     if (nargs == 2)
-        s = toiostream(args[1], "write");
+        s = toiostream(args[1]);
     else
-        s = toiostream(symbol_value(outstrsym), "write");
+        s = toiostream(symbol_value(outstrsym));
     fl_print(s, args[0]);
     return args[0];
 }
@@ -236,19 +236,19 @@
 BUILTIN("io.read", io_read)
 {
     if (nargs != 3)
-        argcount("io.read", nargs, 2);
-    (void)toiostream(args[0], "io.read");
+        argcount(nargs, 2);
+    (void)toiostream(args[0]);
     size_t n;
     fltype_t *ft;
     if (nargs == 3) {
         // form (io.read s type count)
         ft = get_array_type(args[1]);
-        n = toulong(args[2], "io.read") * ft->elsz;
+        n = toulong(args[2]) * ft->elsz;
     }
     else {
         ft = get_type(args[1]);
         if (ft->eltype != nil && !iscons(cdr_(cdr_(args[1]))))
-            lerrorf(ArgError, "io.read: incomplete type");
+            lerrorf(ArgError, "incomplete type");
         n = ft->size;
     }
     value_t cv = cvalue(ft, n);
@@ -257,7 +257,7 @@
     else data = cp_data((cprim_t*)ptr(cv));
     size_t got = ios_read(value2c(ios_t*,args[0]), data, n);
     if (got < n)
-        //lerrorf(IOError, "io.read: end of input reached");
+        //lerrorf(IOError, "end of input reached");
         return FL_EOF;
     return cv;
 }
@@ -264,16 +264,16 @@
 
 // args must contain data[, offset[, count]]
 static void get_start_count_args(value_t *args, uint32_t nargs, size_t sz,
-                                 size_t *offs, size_t *nb, char *fname)
+                                 size_t *offs, size_t *nb)
 {
     if (nargs > 1) {
-        *offs = toulong(args[1], fname);
+        *offs = toulong(args[1]);
         if (nargs > 2)
-            *nb = toulong(args[2], fname);
+            *nb = toulong(args[2]);
         else
             *nb = sz - *offs;
         if (*offs >= sz || *offs + *nb > sz)
-            bounds_error(fname, args[0], args[1]);
+            bounds_error(args[0], args[1]);
     }
 }
 
@@ -280,8 +280,8 @@
 BUILTIN("io.write", io_write)
 {
     if (nargs < 2 || nargs > 4)
-        argcount("io.write", nargs, 2);
-    ios_t *s = toiostream(args[0], "io.write");
+        argcount(nargs, 2);
+    ios_t *s = toiostream(args[0]);
     if (iscprim(args[1]) && ((cprim_t*)ptr(args[1]))->type == wchartype) {
         if (nargs > 2)
             lerrorf(ArgError,
@@ -291,10 +291,10 @@
     }
     char *data;
     size_t sz, offs=0;
-    to_sized_ptr(args[1], "io.write", &data, &sz);
+    to_sized_ptr(args[1], &data, &sz);
     size_t nb = sz;
     if (nargs > 2) {
-        get_start_count_args(&args[1], nargs-1, sz, &offs, &nb, "io.write");
+        get_start_count_args(&args[1], nargs-1, sz, &offs, &nb);
         data += offs;
     }
     return size_wrap(ios_write(s, data, nb));
@@ -303,14 +303,14 @@
 BUILTIN("dump", dump)
 {
     if (nargs < 1 || nargs > 3)
-        argcount("dump", nargs, 1);
-    ios_t *s = toiostream(symbol_value(outstrsym), "dump");
+        argcount(nargs, 1);
+    ios_t *s = toiostream(symbol_value(outstrsym));
     char *data;
     size_t sz, offs=0;
-    to_sized_ptr(args[0], "dump", &data, &sz);
+    to_sized_ptr(args[0], &data, &sz);
     size_t nb = sz;
     if (nargs > 1) {
-        get_start_count_args(args, nargs, sz, &offs, &nb, "dump");
+        get_start_count_args(args, nargs, sz, &offs, &nb);
         data += offs;
     }
     hexdump(s, data, nb, offs);
@@ -317,14 +317,14 @@
     return FL_T;
 }
 
-static char get_delim_arg(value_t arg, char *fname)
+static char get_delim_arg(value_t arg)
 {
-    size_t uldelim = toulong(arg, fname);
+    size_t uldelim = toulong(arg);
     if (uldelim > 0x7f) {
         // wchars > 0x7f, or anything else > 0xff, are out of range
         if ((iscprim(arg) && cp_class((cprim_t*)ptr(arg))==wchartype) ||
             uldelim > 0xff)
-            lerrorf(ArgError, "%s: delimiter out of range", fname);
+            lerrorf(ArgError, "delimiter out of range");
     }
     return (char)uldelim;
 }
@@ -331,7 +331,7 @@
 
 BUILTIN("io.readuntil", io_readuntil)
 {
-    argcount("io.readuntil", nargs, 2);
+    argcount(nargs, 2);
     value_t str = cvalue_string(80);
     cvalue_t *cv = (cvalue_t*)ptr(str);
     char *data = cv_data(cv);
@@ -338,8 +338,8 @@
     ios_t dest;
     ios_mem(&dest, 0);
     ios_setbuf(&dest, data, 80, 0);
-    char delim = get_delim_arg(args[1], "io.readuntil");
-    ios_t *src = toiostream(args[0], "io.readuntil");
+    char delim = get_delim_arg(args[1]);
+    ios_t *src = toiostream(args[0]);
     size_t n = ios_copyuntil(&dest, src, delim);
     cv->len = n;
     if (dest.buf != data) {
@@ -359,10 +359,10 @@
 
 BUILTIN("io.copyuntil", io_copyuntil)
 {
-    argcount("io.copyuntil", nargs, 3);
-    ios_t *dest = toiostream(args[0], "io.copyuntil");
-    ios_t *src = toiostream(args[1], "io.copyuntil");
-    char delim = get_delim_arg(args[2], "io.copyuntil");
+    argcount(nargs, 3);
+    ios_t *dest = toiostream(args[0]);
+    ios_t *src = toiostream(args[1]);
+    char delim = get_delim_arg(args[2]);
     return size_wrap(ios_copyuntil(dest, src, delim));
 }
 
@@ -369,11 +369,11 @@
 BUILTIN("io.copy", io_copy)
 {
     if (nargs < 2 || nargs > 3)
-        argcount("io.copy", nargs, 2);
-    ios_t *dest = toiostream(args[0], "io.copy");
-    ios_t *src = toiostream(args[1], "io.copy");
+        argcount(nargs, 2);
+    ios_t *dest = toiostream(args[0]);
+    ios_t *src = toiostream(args[1]);
     if (nargs == 3) {
-        size_t n = toulong(args[2], "io.copy");
+        size_t n = toulong(args[2]);
         return size_wrap(ios_copy(dest, src, n));
     }
     return size_wrap(ios_copyall(dest, src));
@@ -403,10 +403,10 @@
 
 BUILTIN("io.tostring!", io_tostring)
 {
-    argcount("io.tostring!", nargs, 1);
-    ios_t *src = toiostream(args[0], "io.tostring!");
+    argcount(nargs, 1);
+    ios_t *src = toiostream(args[0]);
     if (src->bm != bm_mem)
-        lerrorf(ArgError, "io.tostring!: requires memory stream");
+        lerrorf(ArgError, "requires memory stream");
     return stream_to_string(&args[0]);
 }
 
--- a/print.c
+++ b/print.c
@@ -720,7 +720,7 @@
             value_t eltype = car(cdr_(type));
             size_t cnt, elsize;
             if (iscons(cdr_(cdr_(type)))) {
-                cnt = toulong(car_(cdr_(cdr_(type))), "length");
+                cnt = toulong(car_(cdr_(cdr_(type))));
                 elsize = cnt ? len/cnt : 0;
             }
             else {
--- a/string.c
+++ b/string.c
@@ -6,7 +6,7 @@
 
 BUILTIN("string?", stringp)
 {
-    argcount("string?", nargs, 1);
+    argcount(nargs, 1);
     return fl_isstring(args[0]) ? FL_T : FL_F;
 }
 
@@ -14,19 +14,19 @@
 {
     size_t start = 0;
     if (nargs < 1 || nargs > 3)
-        argcount("string.count", nargs, 1);
+        argcount(nargs, 1);
     if (!fl_isstring(args[0]))
-        type_error("string.count", "string", args[0]);
+        type_error("string", args[0]);
     size_t len = cv_len((cvalue_t*)ptr(args[0]));
     size_t stop = len;
     if (nargs > 1) {
-        start = toulong(args[1], "string.count");
+        start = toulong(args[1]);
         if (start > len)
-            bounds_error("string.count", args[0], args[1]);
+            bounds_error(args[0], args[1]);
         if (nargs > 2) {
-            stop = toulong(args[2], "string.count");
+            stop = toulong(args[2]);
             if (stop > len)
-                bounds_error("string.count", args[0], args[2]);
+                bounds_error(args[0], args[2]);
             if (stop <= start)
                 return fixnum(0);
         }
@@ -37,7 +37,7 @@
 
 BUILTIN("string.width", string_width)
 {
-    argcount("string.width", nargs, 1);
+    argcount(nargs, 1);
     if (iscprim(args[0])) {
         cprim_t *cp = (cprim_t*)ptr(args[0]);
         if (cp_class(cp) == wchartype) {
@@ -47,15 +47,15 @@
             return fixnum(w);
         }
     }
-    char *s = tostring(args[0], "string.width");
+    char *s = tostring(args[0]);
     return size_wrap(u8_strwidth(s));
 }
 
 BUILTIN("string.reverse", string_reverse)
 {
-    argcount("string.reverse", nargs, 1);
+    argcount(nargs, 1);
     if (!fl_isstring(args[0]))
-        type_error("string.reverse", "string", args[0]);
+        type_error("string", args[0]);
     size_t len = cv_len((cvalue_t*)ptr(args[0]));
     value_t ns = cvalue_string(len);
     u8_reverse(cvalue_data(ns), cvalue_data(args[0]), len);
@@ -64,7 +64,7 @@
 
 BUILTIN("string.encode", string_encode)
 {
-    argcount("string.encode", nargs, 1);
+    argcount(nargs, 1);
     if (iscvalue(args[0])) {
         cvalue_t *cv = (cvalue_t*)ptr(args[0]);
         fltype_t *t = cv_class(cv);
@@ -78,7 +78,7 @@
             return str;
         }
     }
-    type_error("string.encode", "wchar array", args[0]);
+    type_error("wchar array", args[0]);
 }
 
 BUILTIN("string.decode", string_decode)
@@ -88,10 +88,10 @@
         term = (args[1] != FL_F);
     }
     else {
-        argcount("string.decode", nargs, 1);
+        argcount(nargs, 1);
     }
     if (!fl_isstring(args[0]))
-        type_error("string.decode", "string", args[0]);
+        type_error("string", args[0]);
     cvalue_t *cv = (cvalue_t*)ptr(args[0]);
     char *ptr = (char*)cv_data(cv);
     size_t nb = cv_len(cv);
@@ -134,9 +134,9 @@
 
 BUILTIN("string.split", string_split)
 {
-    argcount("string.split", nargs, 2);
-    char *s = tostring(args[0], "string.split");
-    char *delim = tostring(args[1], "string.split");
+    argcount(nargs, 2);
+    char *s = tostring(args[0]);
+    char *delim = tostring(args[1]);
     size_t len = cv_len((cvalue_t*)ptr(args[0]));
     size_t dlen = cv_len((cvalue_t*)ptr(args[1]));
     size_t ssz, tokend, tokstart, i=0;
@@ -178,17 +178,17 @@
 BUILTIN("string.sub", string_sub)
 {
     if (nargs != 2)
-        argcount("string.sub", nargs, 3);
-    char *s = tostring(args[0], "string.sub");
+        argcount(nargs, 3);
+    char *s = tostring(args[0]);
     size_t len = cv_len((cvalue_t*)ptr(args[0]));
     size_t i1, i2;
-    i1 = toulong(args[1], "string.sub");
+    i1 = toulong(args[1]);
     if (i1 > len)
-        bounds_error("string.sub", args[0], args[1]);
+        bounds_error(args[0], args[1]);
     if (nargs == 3) {
-        i2 = toulong(args[2], "string.sub");
+        i2 = toulong(args[2]);
         if (i2 > len)
-            bounds_error("string.sub", args[0], args[2]);
+            bounds_error(args[0], args[2]);
     }
     else {
         i2 = len;
@@ -202,41 +202,41 @@
 
 BUILTIN("string.char", string_char)
 {
-    argcount("string.char", nargs, 2);
-    char *s = tostring(args[0], "string.char");
+    argcount(nargs, 2);
+    char *s = tostring(args[0]);
     size_t len = cv_len((cvalue_t*)ptr(args[0]));
-    size_t i = toulong(args[1], "string.char");
+    size_t i = toulong(args[1]);
     if (i >= len)
-        bounds_error("string.char", args[0], args[1]);
+        bounds_error(args[0], args[1]);
     size_t sl = u8_seqlen(&s[i]);
     if (sl > len || i > len-sl)
-        bounds_error("string.char", args[0], args[1]);
+        bounds_error(args[0], args[1]);
     return mk_wchar(u8_nextchar(s, &i));
 }
 
 BUILTIN("char.upcase", char_upcase)
 {
-    argcount("char.upcase", nargs, 1);
+    argcount(nargs, 1);
     cprim_t *cp = (cprim_t*)ptr(args[0]);
     if (!iscprim(args[0]) || cp_class(cp) != wchartype)
-        type_error("char.upcase", "wchar", args[0]);
+        type_error("wchar", args[0]);
     return mk_wchar(towupper(*(int32_t*)cp_data(cp)));
 }
 BUILTIN("char.downcase", char_downcase)
 {
-    argcount("char.downcase", nargs, 1);
+    argcount(nargs, 1);
     cprim_t *cp = (cprim_t*)ptr(args[0]);
     if (!iscprim(args[0]) || cp_class(cp) != wchartype)
-        type_error("char.downcase", "wchar", args[0]);
+        type_error("wchar", args[0]);
     return mk_wchar(towlower(*(int32_t*)cp_data(cp)));
 }
 
 BUILTIN("char-alphabetic?", char_alphabeticp)
 {
-    argcount("char-alphabetic?", nargs, 1);
+    argcount(nargs, 1);
     cprim_t *cp = (cprim_t*)ptr(args[0]);
     if (!iscprim(args[0]) || cp_class(cp) != wchartype)
-        type_error("char-alphabetic?", "wchar", args[0]);
+        type_error("wchar", args[0]);
     return iswalpha(*(int32_t*)cp_data(cp)) ? FL_T : FL_F;
 }
 
@@ -253,13 +253,13 @@
     char cbuf[8];
     size_t start = 0;
     if (nargs == 3)
-        start = toulong(args[2], "string.find");
+        start = toulong(args[2]);
     else
-        argcount("string.find", nargs, 2);
-    char *s = tostring(args[0], "string.find");
+        argcount(nargs, 2);
+    char *s = tostring(args[0]);
     size_t len = cv_len((cvalue_t*)ptr(args[0]));
     if (start > len)
-        bounds_error("string.find", args[0], args[2]);
+        bounds_error(args[0], args[2]);
     char *needle; size_t needlesz;
 
     value_t v = args[1];
@@ -280,7 +280,7 @@
         needle = (char*)cv_data(cv);
     }
     else {
-        type_error("string.find", "string", args[1]);
+        type_error("string", args[1]);
     }
     if (needlesz > len-start)
         return FL_F;
@@ -301,16 +301,16 @@
 BUILTIN("string.inc", string_inc)
 {
     if (nargs < 2 || nargs > 3)
-        argcount("string.inc", nargs, 2);
-    char *s = tostring(args[0], "string.inc");
+        argcount(nargs, 2);
+    char *s = tostring(args[0]);
     size_t len = cv_len((cvalue_t*)ptr(args[0]));
-    size_t i = toulong(args[1], "string.inc");
+    size_t i = toulong(args[1]);
     size_t cnt = 1;
     if (nargs == 3)
-        cnt = toulong(args[2], "string.inc");
+        cnt = toulong(args[2]);
     while (cnt--) {
         if (i >= len)
-            bounds_error("string.inc", args[0], args[1]);
+            bounds_error(args[0], args[1]);
         (void)(isutf(s[++i]) || isutf(s[++i]) || isutf(s[++i]) || ++i);
     }
     return size_wrap(i);
@@ -319,29 +319,29 @@
 BUILTIN("string.dec", string_dec)
 {
     if (nargs < 2 || nargs > 3)
-        argcount("string.dec", nargs, 2);
-    char *s = tostring(args[0], "string.dec");
+        argcount(nargs, 2);
+    char *s = tostring(args[0]);
     size_t len = cv_len((cvalue_t*)ptr(args[0]));
-    size_t i = toulong(args[1], "string.dec");
+    size_t i = toulong(args[1]);
     size_t cnt = 1;
     if (nargs == 3)
-        cnt = toulong(args[2], "string.dec");
+        cnt = toulong(args[2]);
     // note: i is allowed to start at index len
     if (i > len)
-        bounds_error("string.dec", args[0], args[1]);
+        bounds_error(args[0], args[1]);
     while (cnt--) {
         if (i == 0)
-            bounds_error("string.dec", args[0], args[1]);
+            bounds_error(args[0], args[1]);
         (void)(isutf(s[--i]) || isutf(s[--i]) || isutf(s[--i]) || --i);
     }
     return size_wrap(i);
 }
 
-static unsigned long get_radix_arg(value_t arg, char *fname)
+static unsigned long get_radix_arg(value_t arg)
 {
-    unsigned long radix = toulong(arg, fname);
+    unsigned long radix = toulong(arg);
     if (radix < 2 || radix > 36)
-        lerrorf(ArgError, "%s: invalid radix", fname);
+        lerrorf(ArgError, "invalid radix");
     return radix;
 }
 
@@ -348,12 +348,12 @@
 BUILTIN("number->string", number_2_string)
 {
     if (nargs < 1 || nargs > 2)
-        argcount("number->string", nargs, 2);
+        argcount(nargs, 2);
     value_t n = args[0];
     int neg = 0;
     uint64_t num;
     if (isfixnum(n))      num = numval(n);
-    else if (!iscprim(n)) type_error("number->string", "integer", n);
+    else if (!iscprim(n)) type_error("integer", n);
     else num = conv_to_uint64(cp_data((cprim_t*)ptr(n)),
                               cp_numtype((cprim_t*)ptr(n)));
     if (numval(fl_compare(args[0],fixnum(0))) < 0) {
@@ -362,7 +362,7 @@
     }
     unsigned long radix = 10;
     if (nargs == 2)
-        radix = get_radix_arg(args[1], "number->string");
+        radix = get_radix_arg(args[1]);
     char buf[128];
     char *str = uint2str(buf, sizeof(buf), num, radix);
     if (neg && str > &buf[0])
@@ -373,12 +373,12 @@
 BUILTIN("string->number", string_2_number)
 {
     if (nargs < 1 || nargs > 2)
-        argcount("string->number", nargs, 2);
-    char *str = tostring(args[0], "string->number");
+        argcount(nargs, 2);
+    char *str = tostring(args[0]);
     value_t n;
     unsigned long radix = 0;
     if (nargs == 2)
-        radix = get_radix_arg(args[1], "string->number");
+        radix = get_radix_arg(args[1]);
     if (!isnumtok_base(str, &n, (int)radix))
         return FL_F;
     return n;
@@ -386,8 +386,8 @@
 
 BUILTIN("string.isutf8", string_isutf8)
 {
-    argcount("string.isutf8", nargs, 1);
-    char *s = tostring(args[0], "string.isutf8");
+    argcount(nargs, 1);
+    char *s = tostring(args[0]);
     size_t len = cv_len((cvalue_t*)ptr(args[0]));
     return u8_isvalid(s, len) ? FL_T : FL_F;
 }
--- a/table.c
+++ b/table.c
@@ -64,14 +64,14 @@
 
 BUILTIN("table?", tablep)
 {
-    argcount("table?", nargs, 1);
+    argcount(nargs, 1);
     return ishashtable(args[0]) ? FL_T : FL_F;
 }
 
-static htable_t *totable(value_t v, char *fname)
+static htable_t *totable(value_t v)
 {
     if (!ishashtable(v))
-        type_error(fname, "table", v);
+        type_error("table", v);
     return (htable_t*)cv_data((cvalue_t*)ptr(v));
 }
 
@@ -79,7 +79,7 @@
 {
     size_t cnt = (size_t)nargs;
     if (cnt & 1)
-        lerrorf(ArgError, "table: arguments must come in pairs");
+        lerrorf(ArgError, "arguments must come in pairs");
     value_t nt;
     // prevent small tables from being added to finalizer list
     if (cnt <= HT_N_INLINE) {
@@ -106,8 +106,8 @@
 // (put! table key value)
 BUILTIN("put!", put)
 {
-    argcount("put!", nargs, 3);
-    htable_t *h = totable(args[0], "put!");
+    argcount(nargs, 3);
+    htable_t *h = totable(args[0]);
     void **table0 = h->table;
     equalhash_put(h, (void*)args[1], (void*)args[2]);
     // register finalizer if we outgrew inline space
@@ -119,9 +119,9 @@
     return args[0];
 }
 
-static void key_error(char *fname, value_t key)
+static void key_error(value_t key)
 {
-    lerrorf(fl_list2(KeyError, key), "%s: key not found", fname);
+    lerrorf(fl_list2(KeyError, key), "key not found");
 }
 
 // (get table key [default])
@@ -128,13 +128,13 @@
 BUILTIN("get", get)
 {
     if (nargs != 3)
-        argcount("get", nargs, 2);
-    htable_t *h = totable(args[0], "get");
+        argcount(nargs, 2);
+    htable_t *h = totable(args[0]);
     value_t v = (value_t)equalhash_get(h, (void*)args[1]);
     if (v == (value_t)HT_NOTFOUND) {
         if (nargs == 3)
             return args[2];
-        key_error("get", args[1]);
+        key_error(args[1]);
     }
     return v;
 }
@@ -142,8 +142,8 @@
 // (has? table key)
 BUILTIN("has?", has)
 {
-    argcount("has?", nargs, 2);
-    htable_t *h = totable(args[0], "has?");
+    argcount(nargs, 2);
+    htable_t *h = totable(args[0]);
     return equalhash_has(h, (void*)args[1]) ? FL_T : FL_F;
 }
 
@@ -150,18 +150,18 @@
 // (del! table key)
 BUILTIN("del!", del)
 {
-    argcount("del!", nargs, 2);
-    htable_t *h = totable(args[0], "del!");
+    argcount(nargs, 2);
+    htable_t *h = totable(args[0]);
     if (!equalhash_remove(h, (void*)args[1]))
-        key_error("del!", args[1]);
+        key_error(args[1]);
     return args[0];
 }
 
 BUILTIN("table.foldl", table_foldl)
 {
-    argcount("table.foldl", nargs, 3);
+    argcount(nargs, 3);
     value_t f=args[0], zero=args[1], t=args[2];
-    htable_t *h = totable(t, "table.foldl");
+    htable_t *h = totable(t);
     size_t i, n = h->size;
     void **table = h->table;
     fl_gc_handle(&f);
@@ -176,7 +176,7 @@
             // reload pointer
             h = (htable_t*)cv_data((cvalue_t*)ptr(t));
             if (h->size != n)
-                lerrorf(EnumerationError, "table.foldl: table modified");
+                lerrorf(EnumerationError, "table modified");
             table = h->table;
         }
     }