Add `ary_modify_check()` to `Array#unshift`; ref #3737

059d707e · Yukihiro "Matz" Matsumoto · e1de8613 · 059d707e
Commit 059d707e authored Jul 12, 2017 by Yukihiro "Matz" Matsumoto
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src/array.c src/array.c +1 -0

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--- a/src/array.c
+++ b/src/array.c
@@ -533,6 +533,7 @@ mrb_ary_unshift_m(mrb_state *mrb, mrb_value self)
  if (ARY_SHARED_P(a)
      && a->aux.shared->refcnt == 1 /* shared only referenced from this array */
      && a->ptr - a->aux.shared->ptr >= len) /* there's room for unshifted item */ {
+    ary_modify_check(mrb, a);
    a->ptr -= len;
  }
  else {