From 8322c441eeb62f3ab189c2c33f7f21652ad3ed53 Mon Sep 17 00:00:00 2001
From: dearblue <dearblue@users.osdn.me>
Date: Sun, 31 Dec 2023 14:49:59 +0900
Subject: [PATCH] Remove unreachable blocks in `OP_RETURN`

When `mrb->c->prev` is non `NULL` and `mrb->c->noexec` is false, switching source fiber should suspend with `Fiber#resume`.
In this case, the condition `mrb->c->ci == mrb->c->cibase` is not satisfied.
---
 src/vm.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/src/vm.c b/src/vm.c
index 759fd977a..30bdbf849 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -2340,16 +2340,6 @@ RETRY_TRY_BLOCK:
 
       NORMAL_RETURN:
         ci = mrb->c->ci;
-
-        if (ci == mrb->c->cibase) {
-          struct mrb_context *c;
-          c = mrb->c;
-
-          if (c->prev && !c->vmexec && c->prev->ci == c->prev->cibase) {
-            RAISE_LIT(mrb, E_FIBER_ERROR, "double resume");
-          }
-        }
-
         v = regs[a];
         mrb_gc_protect(mrb, v);
         CHECKPOINT_RESTORE(RBREAK_TAG_BREAK) {