docs: record particle target fail-closed fix
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docs/报告/STEP-055_Float_State_fail-closed小修复_Codex完成报告_v1.md
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docs/报告/STEP-055_Float_State_fail-closed小修复_Codex完成报告_v1.md
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# STEP-055 Float State fail-closed 小修复 Codex 完成报告 v1
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Starting HEAD:`f8027312e6e06d539e9ad222b60ac9a496b1758d`
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## 修改
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仅修改 `src/mbgl/renderer/layers/render_particle_validation_layer.cpp`。
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`createValidationTarget()` 对整个 target 创建与接线路径捕获:
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- `catch (const std::exception&)`:记录 `stage=exception error=...`,返回空 target;覆盖 `std::runtime_error`、`std::bad_alloc` 等标准异常。
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- `catch (...)`:记录 `stage=unknown_exception`,返回空 target。
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- 可渲染性或 texture validation 不通过:记录 `stage=validation`,返回空 target。
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因此异常不会从 Particle Validation target 创建路径继续传播,也不会静默降级为 `UnsignedByte`。
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## 冻结语义
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State A/B 仍为 `TextureChannelDataType::Float`;Trail A/B 仍为 `TextureChannelDataType::UnsignedByte`。未修改 canonical Field、Timeline、Runtime Window、WeatherColorLayer、REAL WEATHER UI 或 `visualSpeedScale=6000`。
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## 验证
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- Linux OpenGL CMake 精确编译 `render_particle_validation_layer.cpp`:PASS。
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- 既有非 Jest `style_layer.test.cpp` 精确编译:PASS。
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- `git diff --check`:PASS。
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- Android Gradle/APK/ADB/设备测试:未执行。
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- Jest:未执行。
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## Git
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功能提交:`7f66b10013fd851fc819c1fea580e0e19f4c934d`(`fix: fail closed on particle target creation exceptions`)。
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已成功 push 至 `origin/particle/main`;本报告为随后的文档元数据提交。用户既有未跟踪文件未修改、未 stage。
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最终状态:**IMPLEMENTED / WAITING_ANDROID_VALIDATION**。
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