UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36

Steps to reproduce the problem:
Execute the function:

function test() {
    let canvas = document.createElement('canvas');
    let gl = canvas.getContext('webgl2');
    let sync = gl.fenceSync(gl.SYNC_GPU_COMMANDS_COMPLETE, 0);
    gl.flush();
    gl.finish();

    let status = gl.getSyncParameter(sync, gl.SYNC_STATUS);
    console.log(sync, status, status === gl.UNSIGNALED);  // logs "true"
    gl.deleteSync(sync);
}

What is the expected behavior?
The console.log() logs false for status===gl.UNSIGNALED, and the status is equal to gl.SIGNALED.

What went wrong?
I'm expecting this to work, since gl.finish() should wait until all GPU commands have been processed - but it looks like the sync fence was not.

This also does not work in a more complete example, where I'm trying to use WebGLSyncs to determine whether a render has been finished.

Did this work before? N/A 

Does this work in other browsers? N/A

Chrome version: 70.0.3538.110  Channel: n/a
OS Version: 10.0
Flash Version: 

I would very much appreciate a minimal, working WebGLSync example that actually gets signaled. I searched GitHub for such but I found nothing.
 

Deleted: test.js 363 bytes

test.js 363 bytes View Download