code review 5319065: gc: small fixes for printing.

src/cmd/gc/fmt.c

 // Copyright 2011 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        "opnames.h"
 
 //
@@ skipping 535 matching lines @@
         if(t == T)
                 return fmtstrcpy(fp, "<T>");
 
         if (t == bytetype || t == runetype) {
                 // in %-T mode collapse rune and byte with their originals.
                 if(fmtmode != FTypeId)
                         return fmtprint(fp, "%hS", t->sym);
                 t = types[t->etype];
         }
 
+        if(t == errortype)
+                return fmtstrcpy(fp, "error");
+
         // Unless the 'l' flag was specified, if the type has a name, just print that name.
         if(!(fp->flags&FmtLong) && t->sym && t->etype != TFIELD && t != types[t->etype]) {
                 switch(fmtmode) {
                 case FTypeId:
                         if(fp->flags&FmtShort)
                                 return fmtprint(fp, "%hS", t->sym);
                         if(fp->flags&FmtUnsigned)
                                 return fmtprint(fp, "%uS", t->sym);
                         // fallthrough
                 case FExp:
@@ skipping 941 matching lines @@
 dumplist(char *s, NodeList *l)
 {
         print("%s\n%+H", s, l);
 }
 
 void
 dump(char *s, Node *n)
 {
         print("%s [%p]\n%+N", s, n, n);
 }