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-rw-r--r--fast-import.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/fast-import.c b/fast-import.c
index 490f64003..d9492b988 100644
--- a/fast-import.c
+++ b/fast-import.c
@@ -1752,7 +1752,14 @@ static struct hash_list *cmd_merge(unsigned int *count)
if (oe->type != OBJ_COMMIT)
die("Mark :%" PRIuMAX " not a commit", idnum);
hashcpy(n->sha1, oe->sha1);
- } else if (get_sha1(from, n->sha1))
+ } else if (!get_sha1(from, n->sha1)) {
+ unsigned long size;
+ char *buf = read_object_with_reference(n->sha1,
+ type_names[OBJ_COMMIT], &size, n->sha1);
+ if (!buf || size < 46)
+ die("Not a valid commit: %s", from);
+ free(buf);
+ } else
die("Invalid ref name or SHA1 expression: %s", from);
n->next = NULL;