From 0f05aac290d22d04cbdf0d222199f8cc64010669 Mon Sep 17 00:00:00 2001
From: Timothy Flynn <trflynn89@pm.me>
Date: Sat, 8 Mar 2025 12:17:55 -0500
Subject: [PATCH] LibCore: Mark the lambda in Promise::when_resolved as mutable

This allows the handler passed into this function to also be mutable.
---
 Libraries/LibCore/Promise.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Libraries/LibCore/Promise.h b/Libraries/LibCore/Promise.h
index 8db457e2d9b..add93c1c074 100644
--- a/Libraries/LibCore/Promise.h
+++ b/Libraries/LibCore/Promise.h
@@ -82,7 +82,7 @@ public:
     template<CallableAs<void, Result&> F>
     Promise& when_resolved(F handler)
     {
-        return when_resolved([handler = move(handler)](Result& result) -> ErrorOr<void> {
+        return when_resolved([handler = move(handler)](Result& result) mutable -> ErrorOr<void> {
             handler(result);
             return {};
         });