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-rw-r--r--array.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/array.c b/array.c
index 0b825dab5f..52981a2b4f 100644
--- a/array.c
+++ b/array.c
@@ -1570,6 +1570,7 @@ ary_join_1(VALUE obj, VALUE ary, VALUE sep, long i, VALUE result)
rb_str_buf_append(result, val);
break;
case T_ARRAY:
+ obj = val;
ary_join:
if (val == ary) {
val = rb_usascii_str_new2("[...]");