LGTM.com - false positive `unreachable statement` for numpy boolean conversion
- 主要語言
- CodeQL
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- 10.1k
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- 2.1k
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- 2 天 15 小時
- 30 天內合併 PR
- 141
描述
Consider this scenario:
```python
import numpy as np
cond = np.arange(25) < 5
try:
less_than_5 = bool(cond)
except ValueError:
less_than_5 = False
```
The `try` block is necessary, since array comparisons by definition raise `ValueError`s. This is certainly not an "unreachable statement". Am I missing something?
**URL to the alert on the project page on LGTM.com**
https://lgtm.com/projects/g/ntjess/s3a/snapshot/8565aa0f07a734d5b92e29b61cd3e6169e67f704/files/s3a/models/tablemodel.py?sort=name&dir=ASC&mode=heatmap#L77
貢獻指南
研究方向
Open the linked LGTM alert and compare it with the Python reproducer, then locate the CodeQL query responsible for the `unreachable statement` alert. Verify how the analysis handles `bool(cond)` when the NumPy array conversion can raise `ValueError`, and use the relevant query coverage to confirm the false positive is resolved.
由索引模型根據 Issue 內容生成。
評估
- 技術堆疊
- numpy, python
- 領域
- devtools
- Issue 類型
- 缺陷
- 難度
- 4/5
- 預估耗時
- 3-5 天
- 活躍度
- 停滯
- 描述清晰度
- 基本清楚
- 新手友好度
- 35/100