rust-lang / rust-lang/rust-analyzer
Non-reproducible builds
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Description
If I make two different copies of rust-analyzer, set them both to build with --remap-path-prefix by adding it to rustflags in .cargo/config, and build them with cargo xtask install, I see multiple differences in the output files, including librust_analyzer.rlib and a number of the rlibs in release/deps. Many of the rlib differences are non-obvious differences in rmeta files.
Now that this is part of the rustc tree, this affects rust-lang/rust#34902.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Reproduce the build from two copies using the rustflags entry in .cargo/config and cargo xtask install. Compare the output files, especially librust_analyzer.rlib and the rlibs under release/deps, then inspect the differing rmeta data. Done means equivalent builds produce identical output files when --remap-path-prefix is enabled.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- build-system
- Issue type
- Bug
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100