cocos-creator-cli-build-debug

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name: cocos-creator-cli-build-debug description: Use when Cocos Creator 3.x CLI build fails with scene or library errors. version: 2.0.0 author: Hermes Agent tags: [cocos-creator, cli, build, debug, error] triggers: - cocos build - build error - compile fail - build fail

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Cocos Creator CLI Build Debug

Debug Cocos Creator 3.x CLI build failures — scene JSON corruption, library import errors, and resource missing errors.

Common CLI Build Errors

Error	Likely Cause	Check
Error 1222/1223	Scene JSON corrupt	python3 -c "import json; json.load(open('assets/scenes/MainScene.scene'))"
resource.ac not found	Asset bundle missing	Check assets/bundle/ exists
Module import failed	TS compile error	Run npx tsc --noEmit
Library version mismatch	Cocos version conflict	Check package.json @cocos/creator version

WeChat Mini Game (wechatgame) Known Issues

Cannot set property 'w' of undefined (2026-06-16)

• Symptom: Console shows TypeError: Cannot set property 'w' of undefined at trt (virtual cc-XXX.js:2)
• Root cause: Cocos engine rendering pipeline initialization fail → FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT in OpenGL framebuffer
• NOT fixed by: Disabling video/webview engine modules, delaying bootstrap init, or changing camera settings
• Status: Confirmed as Cocos 3.8.8 engine bug on WeChat mini game platform
• Workaround: Not found yet — needs Cocos official patch or engine config deep-dive
• Evidence: Bootstrapper mounts successfully, 7 menu buttons created, project starts — but black screen due to rendering pipeline fail

Build Performance

• First build with full engine modules: ~42 seconds
• After disabling unused modules: ~7 seconds
• Key modules to keep for 2D zen game: base, 2d, ui, graphics, gfx-webgl, animation, audio, tween, particle-2d
• Modules safe to disable: video, webview, 3d (if 2D only), physics-3d, gfx-webgpu

Scene Config Tips

• project.json startScene must match the actual scene UUID
• Build uses profiles/v2/packages/builder.json scenes[] list — all listed scenes get built
• overwriteProjectSettings in builder.json can override engine module settings
• After changing engine.json modules, run a full rebuild (not incremental)

Build Command (CLI, no GUI needed)

/Applications/Cocos/Creator/3.8.8/CocosCreator.app/Contents/MacOS/CocosCreator --project . --build "platform=wechatgame"

Recovery Flow

1. Fix any TS compile errors first
2. If scene corrupt: restore from git or rebuild in Editor
3. Clear library cache: rm -rf library/
4. Re-import assets: Open project in Cocos Creator (GUI)

See references/error-catalog.md for complete error code reference.