cmd/compile: report error for unexported name only once

Fixes #22921

Change-Id: If29bd962335ac7676ea4f379727db3d55ae1bf8e
Reviewed-on: https://go-review.googlesource.com/c/go/+/250177
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/test/runtime.go b/test/runtime.go
index 0cf781b814..bccc9b53af 100644
--- a/test/runtime.go
+++ b/test/runtime.go
@@ -17,5 +17,5 @@ package main
 import "runtime"
 
 func main() {
-	runtime.printbool(true)	// ERROR "unexported" "undefined"
+	runtime.printbool(true)	// ERROR "unexported"
 }