code review 5331043: gc: add error type

src/cmd/gc/subr.c

 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 #include        <u.h>
 #include        <libc.h>
 #include        "go.h"
 #include        "md5.h"
 #include        "y.tab.h"
 #include        "yerr.h"
@@ skipping 1465 matching lines @@
         free(p);
         return md5sum(&d);
 }
 
 Type*
 ptrto(Type *t)
 {
         Type *t1;
 
         if(tptr == 0)
-                fatal("ptrto: nil");
+                fatal("ptrto: no tptr");
         t1 = typ(tptr);
         t1->type = t;
         t1->width = widthptr;
         t1->align = widthptr;
         return t1;
 }
 
 void
 frame(int context)
 {
@@ skipping 1476 matching lines @@
 Strlit*
 strlit(char *s)
 {
         Strlit *t;
 ········
         t = mal(sizeof *t + strlen(s));
         strcpy(t->s, s);
         t->len = strlen(s);
         return t;
 }