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Jan 16, 2023
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Update instrument-coverage.md #105954

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2 changes: 2 additions & 0 deletions src/doc/rustc/src/instrument-coverage.md
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Expand Up @@ -201,6 +201,8 @@ $ RUSTFLAGS="-C instrument-coverage" \
cargo test --tests
```

> **Note**: The default for `LLVM_PROFILE_FILE` is `default_%m_%p.profraw`. Versions prior to 1.65 had a default of `default.profraw`, so if using those earlier versions, it is recommended to explicitly set `LLVM_PROFILE_FILE="default_%m_%p.profraw"` to avoid having multiple tests overwrite the `.profraw` files.
Make note of the test binary file paths, displayed after the word "`Running`" in the test output:

```text
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