Errors in async top-level functions do not result in traps

[jeffcharles]

Operating system: MacOS 14.4.1 (Sanoma)
Processor architecture: Apple M3
Rust version: 1.77.1
Javy version: f270956

Problem

Errors in async functions do not result in error messages or traps.

Error Message and Context

Compiling and running:

(async function() {
    adfasdfsa;
})();

should throw a syntax error and trap. Right now it exits successfully with no error messages.

This does not require the experimental_event_loop feature to be enabled.

[jeffcharles]

It looks like this behaviour reproduces with the latest native QuickJS:

➜  quickjs git:(master) ./qjs    
QuickJS - Type "\h" for help
qjs > (async function() {
({  ...         asdfasd;
({  ...         })()
{  }
qjs > (function() {
({  ...         asdfasdf;
({  ...         })()
ReferenceError: 'asdfasdf' is not defined
    at <anonymous> (<evalScript>:2)
    at <eval> (<evalScript>:3)