Bug 267323 - REGRESSION(270429@main): [Win Wasm] Nothing is shown in https://threejs.org/examples/#webgl_animation_keyframes
Summary: REGRESSION(270429@main): [Win Wasm] Nothing is shown in https://threejs.org/e...
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: WebAssembly (show other bugs)
Version: WebKit Nightly Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL: https://threejs.org/examples/#webgl_a...
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2024-01-10 01:33 PST by Fujii Hironori
Modified: 2024-03-13 14:33 PDT (History)
5 users (show)

See Also:

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Fujii Hironori 2024-01-10 01:33:26 PST 
[Win] Nothing is shown in https://threejs.org/examples/#webgl_animation_keyframe

1. Start WinCairo Release MiniBrowser
2. Load https://threejs.org/examples/#webgl_animation_keyframe
3. Select the first demo
4. No object is shown

I did bisecting with my WinCairo collection.

270065@main good
270682@main bad
Comment 1 Fujii Hironori 2024-01-10 22:14:38 PST 
270429@main is the regression point.
Comment 2 Ian Grunert 2024-01-16 10:44:20 PST 
Looks like if webassembly is available it uses a wasm decoder for 3D meshes

https://github.com/mrdoob/three.js/tree/534737d242a82239d7e89457ba6005810a361153/examples/jsm/libs/draco

So something in Windows LLInt breaks on that wasm.
Comment 3 Radar WebKit Bug Importer 2024-01-17 01:34:16 PST 
<rdar://problem/121103304>
Comment 4 Fujii Hironori 2024-03-13 14:33:48 PDT 
This problem can be worked around by disabling WASM. 
$env:JSC_useWebAssembly = 0