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Nov 18, 2024

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@jieyouxu jieyouxu added S-blocked Status: this PR is blocked waiting for something A-diagnostics Area: diagnostics A-test-suite Area: rust-lang/rust test suites T-compiler Relevant to compiler team labels Nov 13, 2024
jhpratt added a commit to jhpratt/rust that referenced this pull request Nov 18, 2024
…ukang

Make rustc consider itself a stable compiler when `RUSTC_BOOTSTRAP=-1`

Addresses rust-lang#123404 to allow test writers to specify `//@ rustc-env:RUSTC_BOOTSTRAP=-1` to have a given rustc consider itself a stable rustc. This is only intended for testing usages.

I did not use `RUSTC_BOOTSTRAP=0` because that can be confusing, i.e. one might think that means "not bootstrapping", but "forcing a given rustc to consider itself a stable compiler" is a different use case.

I also added a specific test to check `RUSTC_BOOTSTRAP`'s various values and how that interacts with rustc's stability story w.r.t. features and cli flags.

Noticed when trying to write a test for enabling ICE file dumping on stable.

Dunno if this needs a compiler FCP or MCP, but I can file an MCP or ask someone to start an FCP if needed. Note that `RUSTC_BOOTSTRAP` is a perma-unstable env var and has no stability guarantees (heh) whatsoever. This does not affect bootstrapping because bootstrap never sets `RUSTC_BOOTSTRAP=-1`. If someone does set that when bootstrapping, it is considered PEBKAC.

Accompanying dev-guide PR: rust-lang/rustc-dev-guide#2136

cc `@estebank` and `@rust-lang/wg-diagnostics` for FYI
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request Nov 18, 2024
Rollup merge of rust-lang#132993 - jieyouxu:i_am_very_stable, r=chenyukang

Make rustc consider itself a stable compiler when `RUSTC_BOOTSTRAP=-1`

Addresses rust-lang#123404 to allow test writers to specify `//@ rustc-env:RUSTC_BOOTSTRAP=-1` to have a given rustc consider itself a stable rustc. This is only intended for testing usages.

I did not use `RUSTC_BOOTSTRAP=0` because that can be confusing, i.e. one might think that means "not bootstrapping", but "forcing a given rustc to consider itself a stable compiler" is a different use case.

I also added a specific test to check `RUSTC_BOOTSTRAP`'s various values and how that interacts with rustc's stability story w.r.t. features and cli flags.

Noticed when trying to write a test for enabling ICE file dumping on stable.

Dunno if this needs a compiler FCP or MCP, but I can file an MCP or ask someone to start an FCP if needed. Note that `RUSTC_BOOTSTRAP` is a perma-unstable env var and has no stability guarantees (heh) whatsoever. This does not affect bootstrapping because bootstrap never sets `RUSTC_BOOTSTRAP=-1`. If someone does set that when bootstrapping, it is considered PEBKAC.

Accompanying dev-guide PR: rust-lang/rustc-dev-guide#2136

cc `@estebank` and `@rust-lang/wg-diagnostics` for FYI
@jieyouxu jieyouxu marked this pull request as ready for review November 18, 2024 08:18
@jieyouxu jieyouxu removed the S-blocked Status: this PR is blocked waiting for something label Nov 18, 2024
@jieyouxu jieyouxu merged commit b679e71 into rust-lang:master Nov 18, 2024
1 check passed
@jieyouxu jieyouxu deleted the i_am_very_stable branch November 18, 2024 08:18
GuillaumeGomez added a commit to GuillaumeGomez/rust that referenced this pull request Nov 18, 2024
Update books

## rust-lang/edition-guide

2 commits in 2d482e203eb6d6e353814cf1415c5f94e590b9e0..915f9b319c2823f310430ecdecd86264a7870d7e
2024-11-06 07:23:07 UTC to 2024-11-05 09:03:41 UTC

- 2021: Update for raw lifetimes (rust-lang/edition-guide#330)
- CI: Switch to merge queue (rust-lang/edition-guide#333)

## rust-lang/nomicon

1 commits in 456b904f791751892b01282fd2757904993c4c26..eac89a3cbe6c4714e5029ae8b5a1c556fd4e8c42
2024-11-16 14:05:28 UTC to 2024-11-16 14:05:28 UTC

- Fix typo in what-unsafe-does (rust-lang/nomicon#469)

## rust-lang/reference

10 commits in da0f6dad767670da0e8cd5af8a7090db3272f626..41ccb0e6478305401dad92e8fd3d04a4304edb4c
2024-11-15 21:45:16 UTC to 2024-11-05 21:46:30 UTC

- Add identifiers to attributes.md and its subchapters (rust-lang/reference#1560)
- Fix 2 typos (rust-lang/reference#1674)
- Add examples to clarify the casting rules (rust-lang/reference#686)
- Explaining how to link mixed C/Rust binaries. (rust-lang/reference#838)
- Add Arm64EC to inline-assembly documentation (rust-lang/reference#1653)
- Add three more WebAssembly features to the list of accepted ones (rust-lang/reference#1638)
- Add s390x to inline-assembly documentation (rust-lang/reference#1643)
- trait object constraint correction (rust-lang/reference#1670)
- Update some "default" representation references (rust-lang/reference#1667)
- Update lifetimes for pre-expansion validation (rust-lang/reference#1668)

## rust-lang/rustc-dev-guide

12 commits in 6a5accd..b679e71
2024-11-18 08:18:15 UTC to 2024-11-05 07:22:17 UTC

- Mention `RUSTC_BOOTSTRAP` for misc testing (rust-lang/rustc-dev-guide#2136)
- Document how to acquire `cdb.exe` (rust-lang/rustc-dev-guide#2137)
- Document `max-llvm-major-version` directive (rust-lang/rustc-dev-guide#2129)
- Document `exact-llvm-major-version` directive (rust-lang/rustc-dev-guide#2135)
- Note Rustfmt for separate rust-analyzer directory (rust-lang/rustc-dev-guide#2134)
- still accurate (rust-lang/rustc-dev-guide#2133)
- typo (rust-lang/rustc-dev-guide#2132)
- add valid date-check marker (rust-lang/rustc-dev-guide#2131)
- Update parallel-rustc.md (rust-lang/rustc-dev-guide#1926)
- Rename `{ignore,only}-debug` -> `{ignore,needs}-{rustc,std}-debug-assertions` (rust-lang/rustc-dev-guide#2101)
- update const stability docs (rust-lang/rustc-dev-guide#2111)
- Ask folks to use the Oxford comma in diagnostics (rust-lang/rustc-dev-guide#2093)
fmease added a commit to fmease/rust that referenced this pull request Nov 19, 2024
Update books

## rust-lang/edition-guide

2 commits in 2d482e203eb6d6e353814cf1415c5f94e590b9e0..915f9b319c2823f310430ecdecd86264a7870d7e
2024-11-06 07:23:07 UTC to 2024-11-05 09:03:41 UTC

- 2021: Update for raw lifetimes (rust-lang/edition-guide#330)
- CI: Switch to merge queue (rust-lang/edition-guide#333)

## rust-lang/nomicon

1 commits in 456b904f791751892b01282fd2757904993c4c26..eac89a3cbe6c4714e5029ae8b5a1c556fd4e8c42
2024-11-16 14:05:28 UTC to 2024-11-16 14:05:28 UTC

- Fix typo in what-unsafe-does (rust-lang/nomicon#469)

## rust-lang/reference

10 commits in da0f6dad767670da0e8cd5af8a7090db3272f626..41ccb0e6478305401dad92e8fd3d04a4304edb4c
2024-11-15 21:45:16 UTC to 2024-11-05 21:46:30 UTC

- Add identifiers to attributes.md and its subchapters (rust-lang/reference#1560)
- Fix 2 typos (rust-lang/reference#1674)
- Add examples to clarify the casting rules (rust-lang/reference#686)
- Explaining how to link mixed C/Rust binaries. (rust-lang/reference#838)
- Add Arm64EC to inline-assembly documentation (rust-lang/reference#1653)
- Add three more WebAssembly features to the list of accepted ones (rust-lang/reference#1638)
- Add s390x to inline-assembly documentation (rust-lang/reference#1643)
- trait object constraint correction (rust-lang/reference#1670)
- Update some "default" representation references (rust-lang/reference#1667)
- Update lifetimes for pre-expansion validation (rust-lang/reference#1668)

## rust-lang/rustc-dev-guide

12 commits in 6a5accd..b679e71
2024-11-18 08:18:15 UTC to 2024-11-05 07:22:17 UTC

- Mention `RUSTC_BOOTSTRAP` for misc testing (rust-lang/rustc-dev-guide#2136)
- Document how to acquire `cdb.exe` (rust-lang/rustc-dev-guide#2137)
- Document `max-llvm-major-version` directive (rust-lang/rustc-dev-guide#2129)
- Document `exact-llvm-major-version` directive (rust-lang/rustc-dev-guide#2135)
- Note Rustfmt for separate rust-analyzer directory (rust-lang/rustc-dev-guide#2134)
- still accurate (rust-lang/rustc-dev-guide#2133)
- typo (rust-lang/rustc-dev-guide#2132)
- add valid date-check marker (rust-lang/rustc-dev-guide#2131)
- Update parallel-rustc.md (rust-lang/rustc-dev-guide#1926)
- Rename `{ignore,only}-debug` -> `{ignore,needs}-{rustc,std}-debug-assertions` (rust-lang/rustc-dev-guide#2101)
- update const stability docs (rust-lang/rustc-dev-guide#2111)
- Ask folks to use the Oxford comma in diagnostics (rust-lang/rustc-dev-guide#2093)
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request Nov 19, 2024
Rollup merge of rust-lang#133181 - rustbot:docs-update, r=ehuss

Update books

## rust-lang/edition-guide

2 commits in 2d482e203eb6d6e353814cf1415c5f94e590b9e0..915f9b319c2823f310430ecdecd86264a7870d7e
2024-11-06 07:23:07 UTC to 2024-11-05 09:03:41 UTC

- 2021: Update for raw lifetimes (rust-lang/edition-guide#330)
- CI: Switch to merge queue (rust-lang/edition-guide#333)

## rust-lang/nomicon

1 commits in 456b904f791751892b01282fd2757904993c4c26..eac89a3cbe6c4714e5029ae8b5a1c556fd4e8c42
2024-11-16 14:05:28 UTC to 2024-11-16 14:05:28 UTC

- Fix typo in what-unsafe-does (rust-lang/nomicon#469)

## rust-lang/reference

10 commits in da0f6dad767670da0e8cd5af8a7090db3272f626..41ccb0e6478305401dad92e8fd3d04a4304edb4c
2024-11-15 21:45:16 UTC to 2024-11-05 21:46:30 UTC

- Add identifiers to attributes.md and its subchapters (rust-lang/reference#1560)
- Fix 2 typos (rust-lang/reference#1674)
- Add examples to clarify the casting rules (rust-lang/reference#686)
- Explaining how to link mixed C/Rust binaries. (rust-lang/reference#838)
- Add Arm64EC to inline-assembly documentation (rust-lang/reference#1653)
- Add three more WebAssembly features to the list of accepted ones (rust-lang/reference#1638)
- Add s390x to inline-assembly documentation (rust-lang/reference#1643)
- trait object constraint correction (rust-lang/reference#1670)
- Update some "default" representation references (rust-lang/reference#1667)
- Update lifetimes for pre-expansion validation (rust-lang/reference#1668)

## rust-lang/rustc-dev-guide

12 commits in 6a5accd..b679e71
2024-11-18 08:18:15 UTC to 2024-11-05 07:22:17 UTC

- Mention `RUSTC_BOOTSTRAP` for misc testing (rust-lang/rustc-dev-guide#2136)
- Document how to acquire `cdb.exe` (rust-lang/rustc-dev-guide#2137)
- Document `max-llvm-major-version` directive (rust-lang/rustc-dev-guide#2129)
- Document `exact-llvm-major-version` directive (rust-lang/rustc-dev-guide#2135)
- Note Rustfmt for separate rust-analyzer directory (rust-lang/rustc-dev-guide#2134)
- still accurate (rust-lang/rustc-dev-guide#2133)
- typo (rust-lang/rustc-dev-guide#2132)
- add valid date-check marker (rust-lang/rustc-dev-guide#2131)
- Update parallel-rustc.md (rust-lang/rustc-dev-guide#1926)
- Rename `{ignore,only}-debug` -> `{ignore,needs}-{rustc,std}-debug-assertions` (rust-lang/rustc-dev-guide#2101)
- update const stability docs (rust-lang/rustc-dev-guide#2111)
- Ask folks to use the Oxford comma in diagnostics (rust-lang/rustc-dev-guide#2093)
Kobzol pushed a commit to Kobzol/rustc-dev-guide that referenced this pull request Jan 3, 2025
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