Guard array when appending

This prevents early collection of the array.  The GC doesn't see the
array on the stack when Ruby is compiled with optimizations enabled

[ruby-core:105099] [Bug #18140]

1 files changed, 1 insertions, 0 deletions

diff --git a/array.c b/array.c
index 34fdc7b22a..50a61db876 100644
--- a/array.c
+++ b/array.c
@@ -4845,6 +4845,7 @@ ary_append(VALUE x, VALUE y)
     if (n > 0) {
         rb_ary_splice(x, RARRAY_LEN(x), 0, RARRAY_CONST_PTR_TRANSIENT(y), n);
     }
+    RB_GC_GUARD(y);
     return x;
 }