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-rw-r--r--refs.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/refs.c b/refs.c
index 7405d1c96..787db21df 100644
--- a/refs.c
+++ b/refs.c
@@ -119,7 +119,8 @@ struct ref_value {
/*
* If REF_KNOWS_PEELED, then this field holds the peeled value
* of this reference, or null if the reference is known not to
- * be peelable.
+ * be peelable. See the documentation for peel_ref() for an
+ * exact definition of "peelable".
*/
unsigned char peeled[20];
};
@@ -1340,6 +1341,8 @@ int peel_ref(const char *refname, unsigned char *sha1)
struct ref_entry *r = get_packed_ref(refname);
if (r && (r->flag & REF_KNOWS_PEELED)) {
+ if (is_null_sha1(r->u.value.peeled))
+ return -1;
hashcpy(sha1, r->u.value.peeled);
return 0;
}