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-rw-r--r--combine-diff.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/combine-diff.c b/combine-diff.c
index 01a8437f5..76ca65136 100644
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -491,7 +491,11 @@ static void show_parent_lno(struct sline *sline, unsigned long l0, unsigned long
static int hunk_comment_line(const char *bol)
{
- int ch = *bol & 0xff;
+ int ch;
+
+ if (!bol)
+ return 0;
+ ch = *bol & 0xff;
return (isalpha(ch) || ch == '_' || ch == '$');
}