From 8404c4668d7e29be524efdd18f0a3e102d0d716d Mon Sep 17 00:00:00 2001
From: John Hawthorn <john@hawthorn.email>
Date: Thu, 14 Aug 2025 17:32:13 -0700
Subject: [PATCH] Don't check for stack overflow when ec is NULL

---
 signal.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/signal.c b/signal.c
index 9edac5a789..b34b38c60b 100644
--- a/signal.c
+++ b/signal.c
@@ -877,6 +877,8 @@ static void
 check_stack_overflow(int sig, const void *addr)
 {
     int ruby_stack_overflowed_p(const rb_thread_t *, const void *);
+    rb_execution_context_t *ec = rb_current_execution_context(false);
+    if (!ec) return;
     rb_thread_t *th = GET_THREAD();
     if (ruby_stack_overflowed_p(th, addr)) {
         reset_sigmask(sig);