uni-app 3.1.9 版本偶尔打包时CPU跑满，进程hang死，有系统日志
uni-app 3.1.9 版本偶尔打包时CPU跑满，进程hang死，有系统日志
操作步骤：
- 云打包偶现
预期结果：
- 不Hang死
实际结果：
- Hang死，只能kill掉
bug描述：
详细日志见附件 包含HBuilderX的日志和System Crash 的日志
| 信息项 | 值 |
|---|---|
| Date/Time | 2021-04-15 14:03:59.547 +0800 |
| End time | 2021-04-15 14:17:03.632 +0800 |
| OS Version | macOS 11.2.3 (Build 20D91) |
| Architecture | x86_64h |
| Report Version | 32 |
| Command | HBuilderX |
| Path | /Applications/HBuilderX.app/Contents/MacOS/HBuilderX |
| Identifier | io.dcloud.HBuilderX |
| Version | 3.1.9.20210413 (3.1.9.20210413) |
| Parent | launchd [1] |
| PID | 59132 |
| Time Since Fork | 1629s |
| Event | hang |
| Duration | 784.09s |
| Duration Sampled | 4.40s (process was unresponsive for 780 seconds before sampling) |
| Steps | 44 (100ms sampling interval) |
| Report threshold | 2.5s |
| Hardware model | MacBookPro16,1 |
| Active cpus | 12 |
| Boot args | chunklist-security-epoch=0 -chunklist-no-rev2-dev |
| Time Awake Since Boot | 248057s |
| Time Since Wake | 15696s |
| Fan speed | 5261 rpm |
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