| Issue |
165899
|
| Summary |
FileCheck: strange regexp match behavior on CFI tests
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
Mephistophiles
|
I encountered CFI test failures in tests similar to compiler-rt/test/cfi/multiple-inheritance.cpp when using a libc implementation that outputs additional debug information.
The issue occurs with FileCheck patterns like:
```
// RUN: FileCheck -check-prefix=CFI -input-file %s %s
Some string 12
1
CFI: 1
CFI-NOT: {{^2$}}
```
This test fails, but if 1 is replaced with `{{^1$}}`, it passes.
Expected Behavior:
- `CFI: 1` should match the digit 1 on owns line
- `CFI-NOT: {{^2$}}` should not find 2 (because in this test there is no string that contains only '2')
Current Behavior:
- `CFI-NOT: {{^2$}}` pattern incorrectly matches, suggesting that after matching 1.
Questions:
- Is this the expected behavior of FileCheck?
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