[Bug]: LimitChunkCount plugin results in "user-provided comparison function does not correctly implement a total order" #8337
Description
System Info
System:
OS: Linux 6.11 Ubuntu 24.10 24.10 (Oracular Oriole)
CPU: (16) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
Memory: 18.66 GB / 30.60 GB
Container: Yes
Shell: 5.9 - /bin/zsh
Binaries:
Node: 22.8.0 - /run/user/1001/fnm_multishells/44973_1730729366596/bin/node
Yarn: 1.22.22 - /run/user/1001/fnm_multishells/44973_1730729366596/bin/yarn
npm: 10.8.2 - /run/user/1001/fnm_multishells/44973_1730729366596/bin/npm
Browsers:
Chrome: 130.0.6723.69
Chromium: 130.0.6723.69
npmPackages:
@rspack/cli: next => 1.1.0-beta.0
@rspack/core: next => 1.1.0-beta.0
Details
I found that if I delete the LimitChunkCount plugin from the build then it it works, but including it in our build results in the error
yarn run v1.22.22
$ npm-run-all build:webpack:*
$ cross-env NODE_ENV=development rspack build
Panic occurred at runtime. Please file an issue on GitHub with the backtrace below: https://github.com/web-infra-dev/rspack/issues
Message: user-provided comparison function does not correctly implement a total order
Location: core/src/slice/sort/shared/smallsort.rs:860
Backtrace omitted.
Run with RUST_BACKTRACE=1 environment variable to display it.
Run with RUST_BACKTRACE=full to include source snippets.
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
ERROR: "build:webpack:dev" exited with 1.
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
Reproduce link
https://github.com/cmdcolin/rspack-error-repro
Reproduce Steps
- clone repo
- run "yarn"
- run "yarn build"
build outputs
Panic occurred at runtime. Please file an issue on GitHub with the backtrace below: https://github.com/web-infra-dev/rspack/issues
Message: user-provided comparison function does not correctly implement a total order
Location: core/src/slice/sort/shared/smallsort.rs:860
the code fails particularly when LimitChunkCount plugin is on and it uses our library (which is admittedly quite large, i don't know quite what it is inside our library that would trigger this)