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-rw-r--r--vm_insnhelper.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index a991e59562..695567ff21 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -2506,7 +2506,11 @@ vm_callee_setup_block_arg_arg0_check(VALUE *argv)
{
VALUE ary, arg0 = argv[0];
ary = rb_check_array_type(arg0);
+#if 0
argv[0] = arg0;
+#else
+ VM_ASSERT(argv[0] == arg0);
+#endif
return ary;
}