From c2a0c4f58126e9db833e482b7611c3cea18622f6 Mon Sep 17 00:00:00 2001
From: Diego <96022404+dzfrias@users.noreply.github.com>
Date: Sun, 16 Jun 2024 07:11:49 -0700
Subject: [PATCH] LibWasm: Report start function traps during instantiation

---
 .../Libraries/LibWasm/AbstractMachine/AbstractMachine.cpp     | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Userland/Libraries/LibWasm/AbstractMachine/AbstractMachine.cpp b/Userland/Libraries/LibWasm/AbstractMachine/AbstractMachine.cpp
index 5b1adfb8b76..7187c314d8d 100644
--- a/Userland/Libraries/LibWasm/AbstractMachine/AbstractMachine.cpp
+++ b/Userland/Libraries/LibWasm/AbstractMachine/AbstractMachine.cpp
@@ -425,7 +425,9 @@ InstantiationResult AbstractMachine::instantiate(Module const& module, Vector<Ex
             instantiation_result = InstantiationError { ByteString::formatted("Start section function referenced invalid index {} of max {} entries", index.value(), functions.size()) };
             return;
         }
-        invoke(functions[index.value()], {});
+        auto result = invoke(functions[index.value()], {});
+        if (result.is_trap())
+            instantiation_result = InstantiationError { ByteString::formatted("Start function trapped: {}", result.trap().reason) };
     });
 
     if (instantiation_result.has_value())