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-rw-r--r--builtin-grep.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/builtin-grep.c b/builtin-grep.c
index 761799d7d0..1df25b07b5 100644
--- a/builtin-grep.c
+++ b/builtin-grep.c
@@ -631,7 +631,7 @@ static int file_callback(const struct option *opt, const char *arg, int unset)
struct grep_opt *grep_opt = opt->value;
FILE *patterns;
int lno = 0;
- struct strbuf sb;
+ struct strbuf sb = STRBUF_INIT;
patterns = fopen(arg, "r");
if (!patterns)