From d4ac4948e745ec83ed6c753bb21c711af7ecaa05 Mon Sep 17 00:00:00 2001
From: Joyee Cheung <joyeec9h3@gmail.com>
Date: Wed, 1 Dec 2021 00:58:16 +0800
Subject: [PATCH] src: use a higher limit in the NearHeapLimitCallback

V8 requires the NearHeapLimitCallback to return a limit that's higher
than the initial one or otherwise it will crash.
---
 src/env.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/env.cc b/src/env.cc
index 2cb2dccdf32ba4..2e28d5aab6dd51 100644
--- a/src/env.cc
+++ b/src/env.cc
@@ -1631,7 +1631,10 @@ size_t Environment::NearHeapLimitCallback(void* data,
   env->isolate()->AutomaticallyRestoreInitialHeapLimit(0.95);
 
   env->is_processing_heap_limit_callback_ = false;
-  return initial_heap_limit;
+
+  // The new limit must be higher than initial_heap_limit or V8 might
+  // crash.
+  return initial_heap_limit + 1;
 }
 
 inline size_t Environment::SelfSize() const {