diff options
Diffstat (limited to 'byterun/compare.c')
| -rw-r--r-- | byterun/compare.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/byterun/compare.c b/byterun/compare.c index 720940fbc..fa4b092df 100644 --- a/byterun/compare.c +++ b/byterun/compare.c @@ -163,7 +163,10 @@ static long compare_val(value v1, value v2) break; } case Custom_tag: { - int res = Custom_ops_val(v1)->compare(v1, v2); + int res; + int (*compare)(value v1, value v2) = Custom_ops_val(v1)->compare; + if (compare == NULL) failwith("equal: abstract value"); + res = Custom_ops_val(v1)->compare(v1, v2); if (res != 0) return res; break; } |