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-rw-r--r--src/cmd/yacc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/cmd/yacc.c b/src/cmd/yacc.c
index d9e30761..0ff114bd 100644
--- a/src/cmd/yacc.c
+++ b/src/cmd/yacc.c
@@ -401,7 +401,7 @@ others(void)
finput = Bopen(parser, OREAD);
if(finput == 0)
- error("cannot find parser %s", parser);
+ error("cannot open parser %s: %r", parser);
warray("yyr1", levprd, nprod);
aryfil(temp1, nprod, 0);
PLOOP(1, i)