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-rw-r--r--sha1_file.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/sha1_file.c b/sha1_file.c
index 34d527f670..a38854ce55 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -315,7 +315,8 @@ static int link_alt_odb_entry(const char *entry, const char *relative_base, int
* thing twice, or object directory itself.
*/
for (alt = alt_odb_list; alt; alt = alt->next) {
- if (!memcmp(ent->base, alt->base, pfxlen)) {
+ if (pfxlen == alt->name - alt->base - 1 &&
+ !memcmp(ent->base, alt->base, pfxlen)) {
free(ent);
return -1;
}