[PATCH 14/14] shallow: handle missing shallow commits gracefully

["Johannes Schindelin via GitGitGadget" <gitgitgadget@xxxxxxxxx>]

From: Johannes Schindelin <johannes.schindelin@xxxxxx>

As pointed out by CodeQL, `lookup_commit()` can return NULL.

Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
---
 shallow.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/shallow.c b/shallow.c
index 4bd9342c9a74..011f262cc7d4 100644
--- a/shallow.c
+++ b/shallow.c
@@ -702,7 +702,8 @@ void assign_shallow_commits_to_refs(struct shallow_info *info,
 	for (i = 0; i < nr_shallow; i++) {
 		struct commit *c = lookup_commit(the_repository,
 						 &oid[shallow[i]]);
-		c->object.flags |= BOTTOM;
+		if (c)
+			c->object.flags |= BOTTOM;
 	}
 
 	for (i = 0; i < ref->nr; i++)
-- 
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