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[PATCH 02/13] am: handle --no-patch-format option




Running "git am --no-patch-format" will currently segfault, since it
tries to parse a NULL argument. Instead, let's have it cancel any
previous --patch-format option.

Signed-off-by: Jeff King <peff@xxxxxxxx>
---
 builtin/am.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/builtin/am.c b/builtin/am.c
index 3ee9a9d2a9..dcb880b699 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -2165,7 +2165,9 @@ static int parse_opt_patchformat(const struct option *opt, const char *arg, int
 {
 	int *opt_value = opt->value;
 
-	if (!strcmp(arg, "mbox"))
+	if (unset)
+		*opt_value = PATCH_FORMAT_UNKNOWN;
+	else if (!strcmp(arg, "mbox"))
 		*opt_value = PATCH_FORMAT_MBOX;
 	else if (!strcmp(arg, "stgit"))
 		*opt_value = PATCH_FORMAT_STGIT;
-- 
2.19.1.1505.g9cd28186cf