LibCore+Userland: Make Promise's on_resolve fallible

This will be primarily necessary for BackgroundAction integration, but
it already allows us to add proper error handling in LibIMAP :^)

1 files changed, 2 insertions, 2 deletions

diff --git a/Userland/Applications/Browser/CookieJar.cpp b/Userland/Applications/Browser/CookieJar.cpp
index cb07e08566..1ad59b6453 100644
--- a/Userland/Applications/Browser/CookieJar.cpp
+++ b/Userland/Applications/Browser/CookieJar.cpp
@@ -571,10 +571,10 @@ void CookieJar::select_all_cookies_from_database(OnSelectAllCookiesResult on_res
                 on_result(cookie.release_value());
         },
         [&]() {
-            promise->resolve({});
+            MUST(promise->resolve({}));
         },
         [&](auto) {
-            promise->resolve({});
+            MUST(promise->resolve({}));
         });
 
     MUST(promise->await());