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One invalid Rust toolchain causes prek to fail #1695

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#1699
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One invalid Rust toolchain causes prek to fail#1695
#1699
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j178copilot-swe-agent
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bugSomething isn't working
@m4tx

Description

@m4tx
m4tx
opened on Feb 26, 2026

Summary

When running a Rust-based hook, I've got the following error:

error: Failed to install hook `oxipng`
  caused by: Failed to install rust
  caused by: Failed to read version from /home/m4tx/projects/rust/build/host/stage0-sysroot/bin/rustc
  caused by: Run command `rustc version` failed
  caused by: No such file or directory (os error 2)

This was very concerning for me at first, since /home/m4tx/projects is a very arbitrary path that I happen to store various repositories in, and I would never expect prek to look for anything in there. Running prek with -vvv did shine some light on this:

2026-02-26T16:45:23.963699Z TRACE Executing `/home/m4tx/.rustup/toolchains/nightly-2025-07-03-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.963942Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.42.0-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.964608Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.57.0-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.964848Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.60-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.965053Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.64.0-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.965181Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.70.0-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.965471Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.966651Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.77.2-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.972872Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.78.0-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.975137Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.79.0-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.977357Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.80.1-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.977749Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.81.0-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.977995Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.84.1-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.978252Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.85-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.978423Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.85.1-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.978681Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.93-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.983378Z TRACE Executing `/home/m4tx/projects/rust/build/host/stage0-sysroot/bin/rustc --version`

Turns out that I was trying to compile Rust from scratch, which resulted in the toolchain being added to rustup. For the next 6 months ran into any issues because of this (since I had a number of other perfectly working toolchains installed) until I tried prek. Removing the problematic toolchain from rustup has fixed the problem.

I don't think that prek should fail on any when it encounters failure using any toolchain; rather, I would expect it to work if at least one Rust toolchain is usable.

Willing to submit a PR?

  • Yes — I’m willing to open a PR to fix this.

Platform

Arch Linux, Linux 6.12.74-1-lts x86_64 GNU/Linux

Version

prek 0.3.3

.pre-commit-config.yaml

repos:
  - repo: https://github.com/oxipng/oxipng
    rev: v9.1.4
    hooks:
      - id: oxipng
        args: ["-o", "max", "--strip", "safe", "--alpha"]

Log file

2026-02-26T16:45:23.937725Z DEBUG prek: 0.3.3
2026-02-26T16:45:23.937755Z DEBUG Args: ["prek", "-vvv"]
2026-02-26T16:45:23.938885Z TRACE get_root: close time.busy=1.10ms time.idle=2.87µs
2026-02-26T16:45:23.938914Z DEBUG Git root: /home/m4tx/projects/m4txblog
2026-02-26T16:45:23.938928Z TRACE Executing `/usr/bin/git ls-files --unmerged`
2026-02-26T16:45:23.939978Z DEBUG Found workspace root at `/home/m4tx/projects/m4txblog`
2026-02-26T16:45:23.939988Z TRACE Include selectors: ``
2026-02-26T16:45:23.939993Z TRACE Skip selectors: ``
2026-02-26T16:45:23.940045Z DEBUG discover{root="/home/m4tx/projects/m4txblog" config=None refresh=false}: Loaded workspace from cache
2026-02-26T16:45:23.940061Z DEBUG discover{root="/home/m4tx/projects/m4txblog" config=None refresh=false}: Loading project configuration path=.pre-commit-config.yaml
2026-02-26T16:45:23.940757Z TRACE discover{root="/home/m4tx/projects/m4txblog" config=None refresh=false}: close time.busy=748µs time.idle=1.18µs
2026-02-26T16:45:23.940780Z TRACE Executing `/usr/bin/git diff --exit-code --name-only -z /home/m4tx/projects/m4txblog/.pre-commit-config.yaml`
2026-02-26T16:45:23.941978Z TRACE Checking lock resource="store" path=/home/m4tx/.cache/prek/.lock
2026-02-26T16:45:23.941999Z DEBUG Acquired lock resource="store"
2026-02-26T16:45:23.942414Z TRACE Using go.mod-derived language_version hook=yamlfmt version=>= 1.21.0
2026-02-26T16:45:23.942428Z TRACE Skipping reading PEP 723 metadata for hook `taplo-fmt` because it already has `additional_dependencies`
2026-02-26T16:45:23.942500Z TRACE No requires-python found in pyproject.toml hook=beautysh
2026-02-26T16:45:23.942539Z TRACE No requires-python found in pyproject.toml hook=shellcheck
2026-02-26T16:45:23.942570Z TRACE No requires-python found in pyproject.toml hook=hadolint
2026-02-26T16:45:23.942645Z TRACE Using pyproject.toml-derived language_version hook=djlint version=>=3.9
2026-02-26T16:45:23.942673Z DEBUG Hooks going to run: ["check-added-large-files", "check-case-conflict", "check-executables-have-shebangs", "check-toml", "detect-private-key", "end-of-file-fixer", "mixed-line-ending", "trailing-whitespace", "yamlfmt", "taplo-fmt", "cargo-fmt", "cargo-clippy", "beautysh", "shellcheck", "hadolint", "oxipng", "djlint"]
2026-02-26T16:45:23.943443Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-FyObJ8sY1LiR7sAKE1L6/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-FyObJ8sY1LiR7sAKE1L6
2026-02-26T16:45:23.943457Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-HHuG4cKRiOVzM3qGb6ss/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-HHuG4cKRiOVzM3qGb6ss
2026-02-26T16:45:23.943465Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-QbZzBUQfSZFtRdaVE8NL/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-QbZzBUQfSZFtRdaVE8NL
2026-02-26T16:45:23.943473Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-LhWxECYz2d70EzKVjsmh/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-LhWxECYz2d70EzKVjsmh
2026-02-26T16:45:23.943484Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-7YuF5G4WLkVq6LWHrMtz/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-7YuF5G4WLkVq6LWHrMtz
2026-02-26T16:45:23.943491Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-7ak4WzdX9JUR8HcC6O5p/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-7ak4WzdX9JUR8HcC6O5p
2026-02-26T16:45:23.943498Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-6cplfcUEyPyw6JpRWxGI/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-6cplfcUEyPyw6JpRWxGI
2026-02-26T16:45:23.943508Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-lwkuRxnh9JeXKKX3Qyw0/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-lwkuRxnh9JeXKKX3Qyw0
2026-02-26T16:45:23.943516Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-8Au7cNq09aOQbybqDBFG/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-8Au7cNq09aOQbybqDBFG
2026-02-26T16:45:23.943526Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-OgWVAVNu33iSWtRs0UVd/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-OgWVAVNu33iSWtRs0UVd
2026-02-26T16:45:23.943532Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-1SquCI7ANmZ0Lgb5DymF/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-1SquCI7ANmZ0Lgb5DymF
2026-02-26T16:45:23.943538Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-yQMOqE3RUqnio1WM7de2/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-yQMOqE3RUqnio1WM7de2
2026-02-26T16:45:23.943544Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-rKhhF0oi9nzg3CeQF0dK/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-rKhhF0oi9nzg3CeQF0dK
2026-02-26T16:45:23.943550Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-Xz43mREJYCXuFtlprWjp/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-Xz43mREJYCXuFtlprWjp
2026-02-26T16:45:23.943556Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-U26PbDyVUlhlq1D63F0f/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-U26PbDyVUlhlq1D63F0f
2026-02-26T16:45:23.943562Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-8V8qsGUPhwEvoPo0Zb6Y/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-8V8qsGUPhwEvoPo0Zb6Y
2026-02-26T16:45:23.943568Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-CSxbBP8W2yBqFeokZ1E8/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-CSxbBP8W2yBqFeokZ1E8
2026-02-26T16:45:23.943574Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-aPj6Yvh3e96YBmEoGZlQ/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-aPj6Yvh3e96YBmEoGZlQ
2026-02-26T16:45:23.943580Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-7fFsK80IBBLWzv6MSpwv/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-7fFsK80IBBLWzv6MSpwv
2026-02-26T16:45:23.943586Z  WARN Skipping invalid installed hook err=failed to read from file `/home/m4tx/.cache/prek/hooks/python-tvRfW0xVrwxVLifqmOVd/.prek-hook.json`: No such file or directory (os error 2) path=/home/m4tx/.cache/prek/hooks/python-tvRfW0xVrwxVLifqmOVd
2026-02-26T16:45:23.943653Z TRACE Using system installed rustup at /usr/bin/rustup
2026-02-26T16:45:23.943665Z DEBUG Hook `check-added-large-files` is a meta or builtin hook, no installation needed
2026-02-26T16:45:23.943670Z DEBUG Hook `check-case-conflict` is a meta or builtin hook, no installation needed
2026-02-26T16:45:23.943675Z DEBUG Hook `check-executables-have-shebangs` is a meta or builtin hook, no installation needed
2026-02-26T16:45:23.943680Z DEBUG Hook `check-toml` is a meta or builtin hook, no installation needed
2026-02-26T16:45:23.943686Z DEBUG Hook `detect-private-key` is a meta or builtin hook, no installation needed
2026-02-26T16:45:23.943691Z DEBUG Hook `end-of-file-fixer` is a meta or builtin hook, no installation needed
2026-02-26T16:45:23.943695Z DEBUG Hook `mixed-line-ending` is a meta or builtin hook, no installation needed
2026-02-26T16:45:23.943700Z DEBUG Hook `trailing-whitespace` is a meta or builtin hook, no installation needed
2026-02-26T16:45:23.943706Z DEBUG Hook `cargo-fmt` does not need installation
2026-02-26T16:45:23.943711Z DEBUG Hook `cargo-clippy` does not need installation
2026-02-26T16:45:23.943718Z DEBUG Found installed environment for hook `yamlfmt` at `/home/m4tx/.cache/prek/hooks/golang-T8YZ8MqThemvD6aRFcFO`
2026-02-26T16:45:23.943746Z TRACE Executing `/usr/bin/python3.14 -I -c import sys, json
info = {
    "version": ".".join(map(str, sys.version_info[:3])),
    "base_exec_prefix": sys.base_exec_prefix,
}
print(json.dumps(info))
 [...]`
2026-02-26T16:45:23.943927Z TRACE Checking lock resource="rustup" path=/home/m4tx/.cache/prek/tools/rustup/.lock
2026-02-26T16:45:23.943941Z DEBUG Acquired lock resource="rustup"
2026-02-26T16:45:23.943957Z TRACE Executing `/usr/bin/rustup toolchain list -v`
2026-02-26T16:45:23.948688Z TRACE Executing `/usr/bin/rustup toolchain list -v`
2026-02-26T16:45:23.953715Z TRACE Executing `/home/m4tx/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.953859Z TRACE Executing `/home/m4tx/.rustup/toolchains/beta-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.953958Z TRACE Executing `/home/m4tx/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.954068Z TRACE Executing `/home/m4tx/.rustup/toolchains/nightly-2024-08-11-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.954174Z TRACE Executing `/home/m4tx/.rustup/toolchains/nightly-2024-09-23-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.954309Z TRACE Executing `/home/m4tx/.rustup/toolchains/nightly-2024-11-14-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.954423Z TRACE Executing `/home/m4tx/.rustup/toolchains/nightly-2025-02-22-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.954548Z TRACE Executing `/home/m4tx/.rustup/toolchains/nightly-2025-02-27-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.960363Z DEBUG Found installed environment for hook `taplo-fmt` at `/home/m4tx/.cache/prek/hooks/python-xJZzuG7TLt4arAwyMlpf`
2026-02-26T16:45:23.960442Z DEBUG Found installed environment for hook `beautysh` at `/home/m4tx/.cache/prek/hooks/python-FJ9SWwb4vVGT8mZmYAZ9`
2026-02-26T16:45:23.960452Z DEBUG Found installed environment for hook `shellcheck` at `/home/m4tx/.cache/prek/hooks/python-1n2w9vxOTWdgSaEyHCdk`
2026-02-26T16:45:23.960462Z DEBUG Found installed environment for hook `hadolint` at `/home/m4tx/.cache/prek/hooks/python-4NRu4vDu1I2oWOGzmI4p`
2026-02-26T16:45:23.960468Z DEBUG Found installed environment for hook `djlint` at `/home/m4tx/.cache/prek/hooks/python-yE1XO8FIDPY4gOj5ABCn`
2026-02-26T16:45:23.963699Z TRACE Executing `/home/m4tx/.rustup/toolchains/nightly-2025-07-03-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.963942Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.42.0-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.964608Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.57.0-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.964848Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.60-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.965053Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.64.0-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.965181Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.70.0-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.965471Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.966651Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.77.2-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.972872Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.78.0-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.975137Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.79.0-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.977357Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.80.1-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.977749Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.81.0-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.977995Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.84.1-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.978252Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.85-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.978423Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.85.1-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.978681Z TRACE Executing `/home/m4tx/.rustup/toolchains/1.93-x86_64-unknown-linux-gnu/bin/rustc --version`
2026-02-26T16:45:23.983378Z TRACE Executing `/home/m4tx/projects/rust/build/host/stage0-sysroot/bin/rustc --version`
2026-02-26T16:45:23.983718Z TRACE Released lock path=/home/m4tx/.cache/prek/tools/rustup/.lock
2026-02-26T16:45:23.983833Z TRACE Released lock path=/home/m4tx/.cache/prek/.lock
error: Failed to install hook `oxipng`
  caused by: Failed to install rust
  caused by: Failed to read version from /home/m4tx/projects/rust/build/host/stage0-sysroot/bin/rustc
  caused by: Run command `rustc version` failed
  caused by: No such file or directory (os error 2)

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