gc: print error detail about failure to open import

R=ken2 CC=golang-dev https://golang.org/cl/1872041

gc: print error detail about failure to open import
R=ken2 CC=golang-dev https://golang.org/cl/1872041
b693847e · Russ Cox · 08e65f79 · b693847e
Commit b693847e authored Jul 17, 2010 by Russ Cox
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lex.c src/cmd/gc/lex.c +1 -1

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--- 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);