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-rw-r--r--eval_intern.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/eval_intern.h b/eval_intern.h
index 549953a..428a2d8 100644
--- a/eval_intern.h
+++ b/eval_intern.h
@@ -172,7 +172,7 @@ enum ruby_tag_type {
#define SCOPE_SET(f) (rb_vm_cref()->nd_visi = (f))
#define CHECK_STACK_OVERFLOW(cfp, margin) do \
- if (((VALUE *)(cfp)->sp) + (margin) + sizeof(rb_control_frame_t) >= ((VALUE *)cfp)) { \
+ if ((VALUE *)((char *)(((VALUE *)(cfp)->sp) + (margin)) + sizeof(rb_control_frame_t)) >= ((VALUE *)cfp)) { \
rb_exc_raise(sysstack_error); \
} \
while (0)