Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
2ad0f96d48
This PR replaces `exit(-1)` with `_exit(-1)` in the forked child branches of `lean_io_process_spawn` (the `chdir` failure and `execvp` failure paths). `exit` flushes inherited C stdio buffers, which share underlying file descriptors with the parent. If the parent had a file handle open with unflushed data, that data would be written to the file in the child and then again when the parent later flushes, resulting in duplicated output. `_exit` skips the stdio flush, so the parent's buffered writes are no longer duplicated into inherited files. Closes https://github.com/leanprover/lean4/issues/13463. 🤖 Prepared with [Claude Code](https://claude.com/claude-code) Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com> |
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| lean-toolchain | ||
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| RELEASES.md | ||
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