Stabilize `#[cfg(panic = "...")]` #93658

cchiw · 2022-02-04T19:06:40Z

rust-highfive · 2022-02-04T19:06:43Z

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @michaelwoerister (or someone else) soon.

Please see the contribution instructions for more information.

bors · 2022-02-07T19:15:00Z

☔ The latest upstream changes (presumably #93738) made this pull request unmergeable. Please resolve the merge conflicts.

joshtriplett · 2022-02-08T18:41:54Z

Note: when announcing this in the release notes, we should document that people shouldn't write code assuming only two panic strategies (e.g. #[cfg(panic = "abort")] being equivalent to #[cfg(not(panic = "unwind"))] and vice versa).

joshtriplett · 2022-02-08T18:43:06Z

Shall we stabilize #[cfg(panic = "...")]?

@rfcbot merge

rfcbot · 2022-02-08T18:43:07Z

scottmcm · 2022-02-08T18:49:10Z

@rfcbot reviewed

(I don't know if this is a complex enough feature for compiler folks to want to be included, BTW.)

joshtriplett · 2022-02-08T22:40:34Z

Yeah, I missed that this was also tagged T-compiler.

Removing T-compiler for a T-lang FCP, but if anyone on T-compiler has concerns with this feature, please feel free to raise them.

@rfcbot cancel

rfcbot · 2022-02-08T22:40:34Z

@joshtriplett proposal cancelled.

joshtriplett · 2022-02-08T22:40:47Z

@rfcbot merge

rfcbot · 2022-02-08T22:40:48Z

Team member @joshtriplett has proposed to merge this. The next step is review by the rest of the tagged team members:

No concerns currently listed.

Once a majority of reviewers approve (and at most 2 approvals are outstanding), this will enter its final comment period. If you spot a major issue that hasn't been raised at any point in this process, please speak up!

See this document for info about what commands tagged team members can give me.

rfcbot · 2022-02-08T22:41:13Z

🔔 This is now entering its final comment period, as per the review above. 🔔

nikomatsakis · 2022-02-14T15:32:25Z

@rfcbot reviewed

cchiw · 2022-02-14T18:20:44Z

The documentation previously in src/doc/unstable-book/src/language-features/cfg-panic.md (minus the bits about the unstable feature gate) should go somewhere, such as in the reference. We shouldn't just delete it without replacement.

Otherwise, LGTM.

Just FYI, additional documentation was accepted by Rust for Example

rfcbot · 2022-02-18T22:41:55Z

The final comment period, with a disposition to merge, as per the review above, is now complete.

As the automated representative of the governance process, I would like to thank the author for their work and everyone else who contributed.

This will be merged soon.

Manishearth · 2022-02-18T22:58:03Z

@bors r=joshtriplett

(#93658 (comment))

bors · 2022-02-18T22:58:04Z

📌 Commit dbeab9c has been approved by joshtriplett

…askrgr Rollup of 7 pull requests Successful merges: - rust-lang#92902 (Improve the documentation of drain members) - rust-lang#93658 (Stabilize `#[cfg(panic = "...")]`) - rust-lang#93954 (rustdoc-json: buffer output) - rust-lang#93979 (Add debug assertions to validate NUL terminator in c strings) - rust-lang#93990 (pre rust-lang#89862 cleanup) - rust-lang#94006 (Use a `Field` in `ConstraintCategory::ClosureUpvar`) - rust-lang#94086 (Fix ScalarInt to char conversion) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup

Pkgsrc changes: * Bump available bootstraps to 1.59.0. * Delete one patch which no longer applies, adjust another. Upstream changes: Version 1.60.0 (2022-04-07) ========================== Language -------- - [Stabilize `#[cfg(panic = "...")]` for either `"unwind"` or `"abort"`.] [93658] - [Stabilize `#[cfg(target_has_atomic = "...")]` for each integer size and `"ptr"`.][93824] Compiler -------- - [Enable combining `+crt-static` and `relocation-model=pic` on `x86_64-unknown-linux-gnu`][86374] - [Fixes wrong `unreachable_pub` lints on nested and glob public reexport][87487] - [Stabilize `-Z instrument-coverage` as `-C instrument-coverage`][90132] - [Stabilize `-Z print-link-args` as `--print link-args`][91606] - [Add new Tier 3 target `mips64-openwrt-linux-musl`\*][92300] - [Add new Tier 3 target `armv7-unknown-linux-uclibceabi` (softfloat)\*][92383] - [Fix invalid removal of newlines from doc comments][92357] - [Add kernel target for RustyHermit][92670] - [Deny mixing bin crate type with lib crate types][92933] - [Make rustc use `RUST_BACKTRACE=full` by default][93566] - [Upgrade to LLVM 14][93577] \* Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support. Libraries --------- - [Guarantee call order for `sort_by_cached_key`][89621] - [Improve `Duration::try_from_secs_f32`/`f64` accuracy by directly processing exponent and mantissa][90247] - [Make `Instant::{duration_since, elapsed, sub}` saturating][89926] - [Remove non-monotonic clocks workarounds in `Instant::now`][89926] - [Make `BuildHasherDefault`, `iter::Empty` and `future::Pending` covariant][92630] Stabilized APIs --------------- - [`Arc::new_cyclic`][arc_new_cyclic] - [`Rc::new_cyclic`][rc_new_cyclic] - [`slice::EscapeAscii`][slice_escape_ascii] - [`<[u8]>::escape_ascii`][slice_u8_escape_ascii] - [`u8::escape_ascii`][u8_escape_ascii] - [`Vec::spare_capacity_mut`][vec_spare_capacity_mut] - [`MaybeUninit::assume_init_drop`][assume_init_drop] - [`MaybeUninit::assume_init_read`][assume_init_read] - [`i8::abs_diff`][i8_abs_diff] - [`i16::abs_diff`][i16_abs_diff] - [`i32::abs_diff`][i32_abs_diff] - [`i64::abs_diff`][i64_abs_diff] - [`i128::abs_diff`][i128_abs_diff] - [`isize::abs_diff`][isize_abs_diff] - [`u8::abs_diff`][u8_abs_diff] - [`u16::abs_diff`][u16_abs_diff] - [`u32::abs_diff`][u32_abs_diff] - [`u64::abs_diff`][u64_abs_diff] - [`u128::abs_diff`][u128_abs_diff] - [`usize::abs_diff`][usize_abs_diff] - [`Display for io::ErrorKind`][display_error_kind] - [`From<u8> for ExitCode`][from_u8_exit_code] - [`Not for !` (the "never" type)][not_never] - [_Op_`Assign<$t> for Wrapping<$t>`][wrapping_assign_ops] - [`arch::is_aarch64_feature_detected!`][is_aarch64_feature_detected] Cargo ----- - [Port cargo from `toml-rs` to `toml_edit`][cargo/10086] - [Stabilize `-Ztimings` as `--timings`][cargo/10245] - [Stabilize namespaced and weak dependency features.][cargo/10269] - [Accept more `cargo:rustc-link-arg-*` types from build script output.][cargo/10274] - [cargo-new should not add ignore rule on Cargo.lock inside subdirs][cargo/10379] Misc ---- - [Ship docs on Tier 2 platforms by reusing the closest Tier 1 platform docs][92800] - [Drop rustc-docs from complete profile][93742] - [bootstrap: tidy up flag handling for llvm build][93918] Compatibility Notes ------------------- - [Remove compiler-rt linking hack on Android][83822] - [Mitigations for platforms with non-monotonic clocks have been removed from `Instant::now`][89926]. On platforms that don't provide monotonic clocks, an instant is not guaranteed to be greater than an earlier instant anymore. - [`Instant::{duration_since, elapsed, sub}` do not panic anymore on underflow, saturating to `0` instead][89926]. In the real world the panic happened mostly on platforms with buggy monotonic clock implementations rather than catching programming errors like reversing the start and end times. Such programming errors will now results in `0` rather than a panic. - In a future release we're planning to increase the baseline requirements for the Linux kernel to version 3.2, and for glibc to version 2.17. We'd love your feedback in [PR #95026][95026]. Internal Changes ---------------- These changes provide no direct user facing benefits, but represent significant improvements to the internals and overall performance of rustc and related tools. - [Switch all libraries to the 2021 edition][92068] [83822]: rust-lang/rust#83822 [86374]: rust-lang/rust#86374 [87487]: rust-lang/rust#87487 [89621]: rust-lang/rust#89621 [89926]: rust-lang/rust#89926 [90132]: rust-lang/rust#90132 [90247]: rust-lang/rust#90247 [91606]: rust-lang/rust#91606 [92068]: rust-lang/rust#92068 [92300]: rust-lang/rust#92300 [92357]: rust-lang/rust#92357 [92383]: rust-lang/rust#92383 [92630]: rust-lang/rust#92630 [92670]: rust-lang/rust#92670 [92800]: rust-lang/rust#92800 [92933]: rust-lang/rust#92933 [93566]: rust-lang/rust#93566 [93577]: rust-lang/rust#93577 [93658]: rust-lang/rust#93658 [93742]: rust-lang/rust#93742 [93824]: rust-lang/rust#93824 [93918]: rust-lang/rust#93918 [95026]: rust-lang/rust#95026 [cargo/10086]: rust-lang/cargo#10086 [cargo/10245]: rust-lang/cargo#10245 [cargo/10269]: rust-lang/cargo#10269 [cargo/10274]: rust-lang/cargo#10274 [cargo/10379]: rust-lang/cargo#10379 [arc_new_cyclic]: https://doc.rust-lang.org/stable/std/sync/struct.Arc.html#method.new_cyclic [rc_new_cyclic]: https://doc.rust-lang.org/stable/std/rc/struct.Rc.html#method.new_cyclic [slice_escape_ascii]: https://doc.rust-lang.org/stable/std/slice/struct.EscapeAscii.html [slice_u8_escape_ascii]: https://doc.rust-lang.org/stable/std/primitive.slice.html#method.escape_ascii [u8_escape_ascii]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.escape_ascii [vec_spare_capacity_mut]: https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.spare_capacity_mut [assume_init_drop]: https://doc.rust-lang.org/stable/std/mem/union.MaybeUninit.html#method.assume_init_drop [assume_init_read]: https://doc.rust-lang.org/stable/std/mem/union.MaybeUninit.html#method.assume_init_read [i8_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.abs_diff [i16_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.abs_diff [i32_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.abs_diff [i64_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.abs_diff [i128_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.abs_diff [isize_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.abs_diff [u8_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.abs_diff [u16_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.abs_diff [u32_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.abs_diff [u64_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.abs_diff [u128_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.abs_diff [usize_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.abs_diff [display_error_kind]: https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#impl-Display [from_u8_exit_code]: https://doc.rust-lang.org/stable/std/process/struct.ExitCode.html#impl-From%3Cu8%3E [not_never]: https://doc.rust-lang.org/stable/std/primitive.never.html#impl-Not [wrapping_assign_ops]: https://doc.rust-lang.org/stable/std/num/struct.Wrapping.html#trait-implementations [is_aarch64_feature_detected]: https://doc.rust-lang.org/stable/std/arch/macro.is_aarch64_feature_detected.html

Pkgsrc changes: * Bump available bootstraps to 1.59.0. * Adjust line number in patches which had non-zero offsets. Upstream changes: Version 1.60.0 (2022-04-07) =========================== Language -------- - [Stabilize `#[cfg(panic = "...")]` for either `"unwind"` or `"abort"`.] [93658] - [Stabilize `#[cfg(target_has_atomic = "...")]` for each integer size and `"ptr"`.][93824] Compiler -------- - [Enable combining `+crt-static` and `relocation-model=pic` on `x86_64-unknown-linux-gnu`][86374] - [Fixes wrong `unreachable_pub` lints on nested and glob public reexport][87487] - [Stabilize `-Z instrument-coverage` as `-C instrument-coverage`][90132] - [Stabilize `-Z print-link-args` as `--print link-args`][91606] - [Add new Tier 3 target `mips64-openwrt-linux-musl`\*][92300] - [Add new Tier 3 target `armv7-unknown-linux-uclibceabi` (softfloat)\*][92383] - [Fix invalid removal of newlines from doc comments][92357] - [Add kernel target for RustyHermit][92670] - [Deny mixing bin crate type with lib crate types][92933] - [Make rustc use `RUST_BACKTRACE=full` by default][93566] - [Upgrade to LLVM 14][93577] \* Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support. Libraries --------- - [Guarantee call order for `sort_by_cached_key`][89621] - [Improve `Duration::try_from_secs_f32`/`f64` accuracy by directly processing exponent and mantissa][90247] - [Make `Instant::{duration_since, elapsed, sub}` saturating][89926] - [Remove non-monotonic clocks workarounds in `Instant::now`][89926] - [Make `BuildHasherDefault`, `iter::Empty` and `future::Pending` covariant][92630] Stabilized APIs --------------- - [`Arc::new_cyclic`][arc_new_cyclic] - [`Rc::new_cyclic`][rc_new_cyclic] - [`slice::EscapeAscii`][slice_escape_ascii] - [`<[u8]>::escape_ascii`][slice_u8_escape_ascii] - [`u8::escape_ascii`][u8_escape_ascii] - [`Vec::spare_capacity_mut`][vec_spare_capacity_mut] - [`MaybeUninit::assume_init_drop`][assume_init_drop] - [`MaybeUninit::assume_init_read`][assume_init_read] - [`i8::abs_diff`][i8_abs_diff] - [`i16::abs_diff`][i16_abs_diff] - [`i32::abs_diff`][i32_abs_diff] - [`i64::abs_diff`][i64_abs_diff] - [`i128::abs_diff`][i128_abs_diff] - [`isize::abs_diff`][isize_abs_diff] - [`u8::abs_diff`][u8_abs_diff] - [`u16::abs_diff`][u16_abs_diff] - [`u32::abs_diff`][u32_abs_diff] - [`u64::abs_diff`][u64_abs_diff] - [`u128::abs_diff`][u128_abs_diff] - [`usize::abs_diff`][usize_abs_diff] - [`Display for io::ErrorKind`][display_error_kind] - [`From<u8> for ExitCode`][from_u8_exit_code] - [`Not for !` (the "never" type)][not_never] - [_Op_`Assign<$t> for Wrapping<$t>`][wrapping_assign_ops] - [`arch::is_aarch64_feature_detected!`][is_aarch64_feature_detected] Cargo ----- - [Port cargo from `toml-rs` to `toml_edit`][cargo/10086] - [Stabilize `-Ztimings` as `--timings`][cargo/10245] - [Stabilize namespaced and weak dependency features.][cargo/10269] - [Accept more `cargo:rustc-link-arg-*` types from build script output.][cargo/10274] - [cargo-new should not add ignore rule on Cargo.lock inside subdirs][cargo/10379] Misc ---- - [Ship docs on Tier 2 platforms by reusing the closest Tier 1 platform docs][92800] - [Drop rustc-docs from complete profile][93742] - [bootstrap: tidy up flag handling for llvm build][93918] Compatibility Notes ------------------- - [Remove compiler-rt linking hack on Android][83822] - [Mitigations for platforms with non-monotonic clocks have been removed from `Instant::now`][89926]. On platforms that don't provide monotonic clocks, an instant is not guaranteed to be greater than an earlier instant anymore. - [`Instant::{duration_since, elapsed, sub}` do not panic anymore on underflow, saturating to `0` instead][89926]. In the real world the panic happened mostly on platforms with buggy monotonic clock implementations rather than catching programming errors like reversing the start and end times. Such programming errors will now results in `0` rather than a panic. - In a future release we're planning to increase the baseline requirements for the Linux kernel to version 3.2, and for glibc to version 2.17. We'd love your feedback in [PR #95026][95026]. Internal Changes ---------------- These changes provide no direct user facing benefits, but represent significant improvements to the internals and overall performance of rustc and related tools. - [Switch all libraries to the 2021 edition][92068] [83822]: rust-lang/rust#83822 [86374]: rust-lang/rust#86374 [87487]: rust-lang/rust#87487 [89621]: rust-lang/rust#89621 [89926]: rust-lang/rust#89926 [90132]: rust-lang/rust#90132 [90247]: rust-lang/rust#90247 [91606]: rust-lang/rust#91606 [92068]: rust-lang/rust#92068 [92300]: rust-lang/rust#92300 [92357]: rust-lang/rust#92357 [92383]: rust-lang/rust#92383 [92630]: rust-lang/rust#92630 [92670]: rust-lang/rust#92670 [92800]: rust-lang/rust#92800 [92933]: rust-lang/rust#92933 [93566]: rust-lang/rust#93566 [93577]: rust-lang/rust#93577 [93658]: rust-lang/rust#93658 [93742]: rust-lang/rust#93742 [93824]: rust-lang/rust#93824 [93918]: rust-lang/rust#93918 [95026]: rust-lang/rust#95026 [cargo/10086]: rust-lang/cargo#10086 [cargo/10245]: rust-lang/cargo#10245 [cargo/10269]: rust-lang/cargo#10269 [cargo/10274]: rust-lang/cargo#10274 [cargo/10379]: rust-lang/cargo#10379 [arc_new_cyclic]: https://doc.rust-lang.org/stable/std/sync/struct.Arc.html#method.new_cyclic [rc_new_cyclic]: https://doc.rust-lang.org/stable/std/rc/struct.Rc.html#method.new_cyclic [slice_escape_ascii]: https://doc.rust-lang.org/stable/std/slice/struct.EscapeAscii.html [slice_u8_escape_ascii]: https://doc.rust-lang.org/stable/std/primitive.slice.html#method.escape_ascii [u8_escape_ascii]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.escape_ascii [vec_spare_capacity_mut]: https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.spare_capacity_mut [assume_init_drop]: https://doc.rust-lang.org/stable/std/mem/union.MaybeUninit.html#method.assume_init_drop [assume_init_read]: https://doc.rust-lang.org/stable/std/mem/union.MaybeUninit.html#method.assume_init_read [i8_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.abs_diff [i16_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.abs_diff [i32_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.abs_diff [i64_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.abs_diff [i128_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.abs_diff [isize_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.abs_diff [u8_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.abs_diff [u16_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.abs_diff [u32_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.abs_diff [u64_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.abs_diff [u128_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.abs_diff [usize_abs_diff]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.abs_diff [display_error_kind]: https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#impl-Display [from_u8_exit_code]: https://doc.rust-lang.org/stable/std/process/struct.ExitCode.html#impl-From%3Cu8%3E [not_never]: https://doc.rust-lang.org/stable/std/primitive.never.html#impl-Not [wrapping_assign_ops]: https://doc.rust-lang.org/stable/std/num/struct.Wrapping.html#trait-implementations [is_aarch64_feature_detected]: https://doc.rust-lang.org/stable/std/arch/macro.is_aarch64_feature_detected.html

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Manishearth changed the title ~~Issue 77443 fix~~ Stabilize #[cfg(panic = "...")] Feb 4, 2022

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Tracking Issue for #[cfg(panic = "...")] #77443

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Charisee added 4 commits February 10, 2022 22:08

Rebase

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remove reference of cfg-panic from the unstable book

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remove mention of cfg_panic from library tests

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add cfg_panic bootstrap

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Update abort_unwind.md rust-lang/rust-by-example#1505

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matthiaskrgr mentioned this pull request Feb 19, 2022

Rollup of 7 pull requests #94148

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jplatte mentioned this pull request Mar 5, 2022

Add cfg_panic jplatte/caniuse.rs#53

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ehuss mentioned this pull request Mar 14, 2022

Documentation PR for cfg_panic rust-lang/reference#1157

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Document panic=abort limitation iex-rs/iex#4

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Stabilize `#[cfg(panic = "...")]` #93658

Stabilize `#[cfg(panic = "...")]` #93658

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Stabilize #[cfg(panic = "...")] #93658

Stabilize #[cfg(panic = "...")] #93658

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Stabilize `#[cfg(panic = "...")]` #93658

Stabilize `#[cfg(panic = "...")]` #93658

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edited by joshtriplett

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Manishearth commented Feb 18, 2022 •

edited

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