From b693847ea8de7fb87dca00eff357488674ce39ad Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@golang.org>
Date: Fri, 16 Jul 2010 21:38:51 -0700
Subject: [PATCH] gc: print error detail about failure to open import

R=ken2
CC=golang-dev
https://golang.org/cl/1872041
---
 src/cmd/gc/lex.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/cmd/gc/lex.c b/src/cmd/gc/lex.c
index 68aa915a91..1499c0426e 100644
--- a/src/cmd/gc/lex.c
+++ b/src/cmd/gc/lex.c
@@ -384,7 +384,7 @@ importfile(Val *f, int line)
 
 	imp = Bopen(namebuf, OREAD);
 	if(imp == nil) {
-		yyerror("can't open import: %Z", f->u.sval);
+		yyerror("can't open import: %Z: %r", f->u.sval);
 		errorexit();
 	}
 	file = strdup(namebuf);
-- 
2.50.0