gc: omit argument names from function types in error messages
Fixes #2563
R=rsc
CC=golang-dev
https://golang.org/cl/5495047
diff --git a/src/cmd/gc/fmt.c b/src/cmd/gc/fmt.c
index 886488a..c627adb 100644
--- a/src/cmd/gc/fmt.c
+++ b/src/cmd/gc/fmt.c
@@ -680,7 +680,7 @@
case TSTRUCT:
if(t->funarg) {
fmtstrcpy(fp, "(");
- if(fmtmode == FTypeId) { // no argument names on function signature, and no "noescape" tags
+ if(fmtmode == FTypeId || fmtmode == FErr) { // no argument names on function signature, and no "noescape" tags
for(t1=t->type; t1!=T; t1=t1->down)
if(t1->down)
fmtprint(fp, "%hT, ", t1);
diff --git a/test/fixedbugs/bug389.go b/test/fixedbugs/bug389.go
new file mode 100644
index 0000000..40d6c41
--- /dev/null
+++ b/test/fixedbugs/bug389.go
@@ -0,0 +1,12 @@
+// errchk $G $D/$F.go
+
+// 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.
+
+// Issue 2563
+package foo
+
+func fn(a float32) {}
+
+var f func(arg int) = fn // ERROR "cannot use fn .type func.float32.. as type func.int. in assignment"
\ No newline at end of file
