Eric Traut a4076ab4b1 Avoid AbsolutePathBuf::parent() panic under EMFILE by skipping re-absolutization (#12647) ...

Fixes #12216

Fixes a panic in `AbsolutePathBuf::parent()` when the process hits file
descriptor exhaustion (`EMFILE` / "Too many open files").

### Root cause

`AbsolutePathBuf::parent()` was re-validating the parent path via
`from_absolute_path(...).expect(...)`.

`from_absolute_path()` calls `path_absolutize::absolutize()`, which can
depend on `std::env::current_dir()`. Under `EMFILE`, that can fail,
causing `parent()` to panic even though the parent of an absolute path
is already known.

### Change

- Stop re-absolutizing the result of `self.0.parent()`
- Construct `AbsolutePathBuf` directly from the known parent path
- Keep an invariant check with `debug_assert!(p.is_absolute())`

### Why this is safe

`self` is already an `AbsolutePathBuf`, so `self.0` is
absolute/normalized. The parent of an absolute path is expected to be
absolute, so re-running fallible normalization here is unnecessary and
can introduce unrelated panics.

a4076ab4b1 · 2026-02-23 21:59:33 -08:00

History

..

src

Avoid AbsolutePathBuf::parent() panic under EMFILE by skipping re-absolutization (#12647)

2026-02-23 21:59:33 -08:00

BUILD.bazel

feat: add support for building with Bazel (#8875)

2026-01-09 11:09:43 -08:00

Cargo.toml

fix: writable_roots doesn't recognize home directory symbol in non-windows OS (#9193)

2026-01-20 10:55:01 -08:00