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make noop_method_call warn by default #111916

Merged
merged 3 commits into from Jul 29, 2023
Merged

make noop_method_call warn by default #111916

merged 3 commits into from Jul 29, 2023

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fee1-dead
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@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels May 24, 2023
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erikdesjardins
erikdesjardins reviewed May 24, 2023
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tests/ui/lint/noop-method-call.stderr Outdated
@@ -1,62 +1,58 @@
warning: call to `.clone()` on a reference in this situation does nothing
--> $DIR/noop-method-call.rs:16:71
--> $DIR/noop-method-call.rs:15:71
|
LL | let non_clone_type_ref_clone: &PlainType<u32> = non_clone_type_ref.clone();
| ^^^^^^^^ unnecessary method call
|
= note: the type `&PlainType<u32>` which `clone` is being called on is the same as the type returned from `clone`, so the method call does not do anything and can be removed
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This note doesn't really make sense. Vec<i32>::clone also returns the same type it's called on, but that doesn't mean it does nothing. (Alternatively, if you argue that autoref means Vec::new().clone() actually calls clone on &Vec, then clone never returns the type it's called on and the note is still incorrect, because then we're calling clone on &&PlainType<u32>)

I would suggest something like:

Suggested change
= note: the type `&PlainType<u32>` which `clone` is being called on is the same as the type returned from `clone`, so the method call does not do anything and can be removed
= note: the type `PlainType<u32>` does not implement `Clone`, so calling `clone` on `&PlainType<u32>` clones the reference, which does not do anything and can be removed

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@rustbot rustbot added A-testsuite Area: The testsuite used to check the correctness of rustc T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) labels May 26, 2023
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bors commented May 27, 2023

☔ The latest upstream changes (presumably #111348) made this pull request unmergeable. Please resolve the merge conflicts.

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rustbot commented May 28, 2023

Some changes occurred in src/tools/clippy

cc @rust-lang/clippy

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compiler-errors
compiler-errors approved these changes May 29, 2023
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Does bumping a lint from allow -> warn need an fcp or anything? Implementation looks fine now -- I like the new rewording too.

compiler/rustc_lint/src/noop_method_call.rs Outdated Show resolved Hide resolved
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Not sure about whether a fcp is needed.

cc @rust-lang/compiler-contributors

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cc @rust-lang/compiler-contributors

(That's a huge ping group with more than 40 people, most of whom do not have FCP power. It's probably not what you wanted to ping here.)

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It's the group that gets pinged for MCPs so I pinged.

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oli-obk commented May 30, 2023

This lint was made allow-by-default in the original PR, but there was never the proposed follow up to make it warn-by-default. I think it was mostly allow-by-default to make it easier for clippy to transition?

This implemented the lint proposed in the following lang-team MCP: rust-lang/lang-team#67

The lang team would like to see a crater run with this lint denied to judge its effects on existing code.

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experiment PR now up at #112160

@compiler-errors compiler-errors added S-waiting-on-crater Status: Waiting on a crater run to be completed. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jun 5, 2023
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experiment completed. Should I add a suggestion to the diagnostic?

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fee1-dead commented Jun 7, 2023 •
edited

Marking as S-waiting-on(-lang)-team

@fee1-dead fee1-dead added T-lang Relevant to the language team, which will review and decide on the PR/issue. S-waiting-on-team Status: Awaiting decision from the relevant subteam (see the T-<team> label). and removed S-waiting-on-crater Status: Waiting on a crater run to be completed. labels Jun 7, 2023
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oli-obk commented Jun 8, 2023

experiment completed. Should I add a suggestion to the diagnostic?

Please summarize the crater results. You can then add the lang team nominated label so their triage picks it up

@rustbot rustbot added the T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) label Jul 23, 2023
@fee1-dead fee1-dead removed the T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) label Jul 23, 2023
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I have added a suggestion.

@fee1-dead fee1-dead added the T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) label Jul 23, 2023
@rfcbot rfcbot added finished-final-comment-period The final comment period is finished for this PR / Issue. to-announce Announce this issue on triage meeting and removed final-comment-period In the final comment period and will be merged soon unless new substantive objections are raised. labels Jul 28, 2023
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rfcbot commented Jul 28, 2023

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.

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@bors r+

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bors commented Jul 28, 2023

📌 Commit 2a76c57 has been approved by compiler-errors

It is now in the queue for this repository.

@bors bors added the S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. label Jul 28, 2023
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bors commented Jul 29, 2023

⌛ Testing commit 2a76c57 with merge 4734ac0...

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bors commented Jul 29, 2023

☀️ Test successful - checks-actions
Approved by: compiler-errors
Pushing 4734ac0 to master...

@bors bors added the merged-by-bors This PR was explicitly merged by bors. label Jul 29, 2023
@bors bors merged commit 4734ac0 into rust-lang:master Jul 29, 2023
12 checks passed
@rustbot rustbot added this to the 1.73.0 milestone Jul 29, 2023
@fee1-dead fee1-dead deleted the noop-method-call-warn branch July 29, 2023 06:56
@fee1-dead fee1-dead added relnotes Marks issues that should be documented in the release notes of the next release. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. S-waiting-on-fcp Status: PR is in FCP and is awaiting for FCP to complete. labels Jul 29, 2023
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Finished benchmarking commit (4734ac0): comparison URL.

Overall result: no relevant changes - no action needed

@rustbot label: -perf-regression

Instruction count

This benchmark run did not return any relevant results for this metric.

Max RSS (memory usage)

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

mean range count
Regressions ❌
(primary)		 3.9% [3.9%, 3.9%] 1
Regressions ❌
(secondary)		 - - 0
Improvements ✅
(primary)		 -0.6% [-0.6%, -0.6%] 1
Improvements ✅
(secondary)		 - - 0
All ❌✅ (primary) 1.7% [-0.6%, 3.9%] 2

Cycles

This benchmark run did not return any relevant results for this metric.

Binary size

This benchmark run did not return any relevant results for this metric.

Bootstrap: 651.453s -> 650.829s (-0.10%)

@apiraino apiraino removed the to-announce Announce this issue on triage meeting label Aug 4, 2023
flip1995 pushed a commit to flip1995/rust that referenced this pull request Aug 11, 2023
@bors
Auto merge of rust-lang#111916 - fee1-dead-contrib:noop-method-call-w…
0c0026e 
…arn, r=compiler-errors

make `noop_method_call` warn by default

r? `@compiler-errors`
wip-sync pushed a commit to NetBSD/pkgsrc-wip that referenced this pull request Oct 6, 2023
@jperkin
rust: Upgrade to 1.73.0.
3a92f61 
Language
--------

- [Uplift `clippy::fn_null_check` lint as `useless_ptr_null_checks`.]
  (rust-lang/rust#111717)
- [Make `noop_method_call` warn by default.]
  (rust-lang/rust#111916)
- [Support interpolated block for `try` and `async` in macros.]
  (rust-lang/rust#112953)
- [Make `unconditional_recursion` lint detect recursive drops.]
  (rust-lang/rust#113902)
- [Future compatibility warning for some impls being incorrectly
  considered not overlapping.]
  (rust-lang/rust#114023)
- [The `invalid_reference_casting` lint is now **deny-by-default**
  (instead of allow-by-default)]
  (rust-lang/rust#112431)

Compiler
--------

- [Write version information in a `.comment` section like GCC/Clang.]
  (rust-lang/rust#97550)
- [Add documentation on v0 symbol mangling.]
  (rust-lang/rust#97571)
- [Stabilize `extern "thiscall"` and `"thiscall-unwind"` ABIs.]
  (rust-lang/rust#114562)
- [Only check outlives goals on impl compared to trait.]
  (rust-lang/rust#109356)
- [Infer type in irrefutable slice patterns with fixed length as array.]
  (rust-lang/rust#113199)
- [Discard default auto trait impls if explicit ones exist.]
  (rust-lang/rust#113312)
- Add several new tier 3 targets:
    - [`aarch64-unknown-teeos`]
      (rust-lang/rust#113480)
    - [`csky-unknown-linux-gnuabiv2`]
      (rust-lang/rust#113658)
    - [`riscv64-linux-android`]
      (rust-lang/rust#112858)
    - [`riscv64gc-unknown-hermit`]
      (rust-lang/rust#114004)
    - [`x86_64-unikraft-linux-musl`]
      (rust-lang/rust#113411)
    - [`x86_64-unknown-linux-ohos`]
      (rust-lang/rust#113061)
- [Add `wasm32-wasi-preview1-threads` as a tier 2 target.]
  (rust-lang/rust#112922)

Refer to Rust's [platform support page][platform-support-doc]
for more information on Rust's tiered platform support.

Libraries
---------

- [Add `Read`, `Write` and `Seek` impls for `Arc<File>`.]
  (rust-lang/rust#94748)
- [Merge functionality of `io::Sink` into `io::Empty`.]
  (rust-lang/rust#98154)
- [Implement `RefUnwindSafe` for `Backtrace`]
  (rust-lang/rust#100455)
- [Make `ExitStatus` implement `Default`]
  (rust-lang/rust#106425)
- [`impl SliceIndex<str> for (Bound<usize>, Bound<usize>)`]
  (rust-lang/rust#111081)
- [Change default panic handler message format.]
  (rust-lang/rust#112849)
- [Cleaner `assert_eq!` & `assert_ne!` panic messages.]
  (rust-lang/rust#111071)
- [Correct the (deprecated) Android `stat` struct definitions.]
  (rust-lang/rust#113130)

Stabilized APIs
---------------

- [Unsigned `{integer}::div_ceil`]
  (https://doc.rust-lang.org/stable/std/primitive.u32.html#method.div_ceil)
- [Unsigned `{integer}::next_multiple_of`]
  (https://doc.rust-lang.org/stable/std/primitive.u32.html#method.next_multiple_of)
- [Unsigned `{integer}::checked_next_multiple_of`]
  (https://doc.rust-lang.org/stable/std/primitive.u32.html#method.checked_next_multiple_of)
- [`std::ffi::FromBytesUntilNulError`]
  (https://doc.rust-lang.org/stable/std/ffi/struct.FromBytesUntilNulError.html)
- [`std::os::unix::fs::chown`]
  (https://doc.rust-lang.org/stable/std/os/unix/fs/fn.chown.html)
- [`std::os::unix::fs::fchown`]
  (https://doc.rust-lang.org/stable/std/os/unix/fs/fn.fchown.html)
- [`std::os::unix::fs::lfchown`]
  (https://doc.rust-lang.org/stable/std/os/unix/fs/fn.lchown.html)
- [`LocalKey::<Cell<T>>::get`]
  (https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.get)
- [`LocalKey::<Cell<T>>::set`]
  (https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.set)
- [`LocalKey::<Cell<T>>::take`]
  (https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.take)
- [`LocalKey::<Cell<T>>::replace`]
  (https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.replace)
- [`LocalKey::<RefCell<T>>::with_borrow`]
  (https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.with_borrow)
- [`LocalKey::<RefCell<T>>::with_borrow_mut`]
  (https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.with_borrow_mut)
- [`LocalKey::<RefCell<T>>::set`]
  (https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.set-1)
- [`LocalKey::<RefCell<T>>::take`]
  (https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.take-1)
- [`LocalKey::<RefCell<T>>::replace`]
  (https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.replace-1)

These APIs are now stable in const contexts:

- [`rc::Weak::new`]
  (https://doc.rust-lang.org/stable/alloc/rc/struct.Weak.html#method.new)
- [`sync::Weak::new`]
  (https://doc.rust-lang.org/stable/alloc/sync/struct.Weak.html#method.new)
- [`NonNull::as_ref`]
  (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.as_ref)

Cargo
-----

- [Encode URL params correctly for `SourceId` in `Cargo.lock`.]
  (rust-lang/cargo#12280)
- [Bail out an error when using `cargo::` in custom build script.]
  (rust-lang/cargo#12332)

Compatibility Notes
-------------------

- [Update the minimum external LLVM to 15.]
  (rust-lang/rust#114148)
- [Check for non-defining uses of return position `impl Trait`.]
  (rust-lang/rust#112842)

Internal Changes
----------------

These changes do not affect any public interfaces of Rust, but they represent
significant improvements to the performance or internals of rustc and related
tools.

- [Remove LLVM pointee types, supporting only opaque pointers.]
  (rust-lang/rust#105545)
- [Port PGO/LTO/BOLT optimized build pipeline to Rust.]
  (rust-lang/rust#112235)
- [Replace in-tree `rustc_apfloat` with the new version of the crate.]
  (rust-lang/rust#113843)
- [Update to LLVM 17.]
  (rust-lang/rust#114048)
- [Add `internal_features` lint for internal unstable features.]
  (rust-lang/rust#108955)
- [Mention style for new syntax in tracking issue template.]
  (rust-lang/rust#113586)
@torives torives mentioned this pull request Oct 24, 2023
Merged
netbsd-srcmastr pushed a commit to NetBSD/pkgsrc that referenced this pull request Nov 16, 2023
@he32
rust: Upgrade to version 1.73.0.
9081e36 
Pkgsrc changes:
 * Adjust patches and cargo checksums to new versions.
 * For an external LLVM, set dependency of llvm >= 15, in accordance
   with the upstream changes.
 * Add a patch with a backport from LLVM 17.0.3 fixing codegen for
   PPC, ref. rust-lang/rust#116845

Upstream changes:

Version 1.73.0 (2023-10-05)
==========================

Language
--------

- [Uplift `clippy::fn_null_check` lint as `useless_ptr_null_checks`.]
  (rust-lang/rust#111717)
- [Make `noop_method_call` warn by default.]
  (rust-lang/rust#111916)
- [Support interpolated block for `try` and `async` in macros.]
  (rust-lang/rust#112953)
- [Make `unconditional_recursion` lint detect recursive drops.]
  (rust-lang/rust#113902)
- [Future compatibility warning for some impls being incorrectly
  considered not overlapping.]
  (rust-lang/rust#114023)
- [The `invalid_reference_casting` lint is now **deny-by-default**
  (instead of allow-by-default)]
  (rust-lang/rust#112431

Compiler
--------

- [Write version information in a `.comment` section like GCC/Clang.]
  (rust-lang/rust#97550)
- [Add documentation on v0 symbol mangling.]
  (rust-lang/rust#97571)
- [Stabilize `extern "thiscall"` and `"thiscall-unwind"` ABIs.]
  (rust-lang/rust#114562)
- [Only check outlives goals on impl compared to trait.]
  (rust-lang/rust#109356)
- [Infer type in irrefutable slice patterns with fixed length as array.]
  (rust-lang/rust#113199)
- [Discard default auto trait impls if explicit ones exist.]
  (rust-lang/rust#113312)
- Add several new tier 3 targets:
    - [`aarch64-unknown-teeos`]
      (rust-lang/rust#113480)
    - [`csky-unknown-linux-gnuabiv2`]
      (rust-lang/rust#113658)
    - [`riscv64-linux-android`]
      (rust-lang/rust#112858)
    - [`riscv64gc-unknown-hermit`]
      (rust-lang/rust#114004)
    - [`x86_64-unikraft-linux-musl`]
      (rust-lang/rust#113411)
    - [`x86_64-unknown-linux-ohos`]
      (rust-lang/rust#113061)
- [Add `wasm32-wasi-preview1-threads` as a tier 2 target.]
  (rust-lang/rust#112922)

Refer to Rust's [platform support page][platform-support-doc]
for more information on Rust's tiered platform support.

Libraries
---------

- [Add `Read`, `Write` and `Seek` impls for `Arc<File>`.]
  (rust-lang/rust#94748)
- [Merge functionality of `io::Sink` into `io::Empty`.]
  (rust-lang/rust#98154)
- [Implement `RefUnwindSafe` for `Backtrace`]
  (rust-lang/rust#100455)
- [Make `ExitStatus` implement `Default`]
  (rust-lang/rust#106425)
- [`impl SliceIndex<str> for (Bound<usize>, Bound<usize>)`]
  (rust-lang/rust#111081)
- [Change default panic handler message format.]
  (rust-lang/rust#112849)
- [Cleaner `assert_eq!` & `assert_ne!` panic messages.]
  (rust-lang/rust#111071)
- [Correct the (deprecated) Android `stat` struct definitions.]
  (rust-lang/rust#113130)

Stabilized APIs
---------------

- [Unsigned `{integer}::div_ceil`]
  (https://doc.rust-lang.org/stable/std/primitiv e.u32.html#method.div_ceil)
- [Unsigned `{integer}::next_multiple_of`]
  (https://doc.rust-lang.org/stable/std/primitive.u32.html#method.next_multiple_of)
- [Unsigned `{integer}::checked_next_multiple_of`]
  (https://doc.rust-lang.org/stable/std/primitive.u32.html#method.checked_next_multiple_of)
- [`std::ffi::FromBytesUntilNulError`]
  (https://doc.rust-lang.org/stable/std/ffi/struct.FromBytesUntilNulError.html)
- [`std::os::unix::fs::chown`]
  (https://doc.rust-lang.org/stable/std/os/unix/fs/fn.chown.html)
- [`std::os::unix::fs::fchown`]
  (https://doc.rust-lang.org/stable/std/os/unix/fs/fn.fchown.html)
- [`std::os::unix::fs::lfchown`]
  (https://doc.rust-lang.org/stable/std/os/unix/fs/fn.lchown.html)
- [`LocalKey::<Cell<T>>::get`]
  (https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.get)
- [`LocalKey::<Cell<T>>::set`]
  (https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.set)
- [`LocalKey::<Cell<T>>::take`]
  (https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.take)
- [`LocalKey::<Cell<T>>::replace`]
  (https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.replace)
- [`LocalKey::<RefCell<T>>::with_borrow`]
  (https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.with_borrow)
- [`LocalKey::<RefCell<T>>::with_borrow_mut`]
  (https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.with_borrow_mut)
- [`LocalKey::<RefCell<T>>::set`]
  (https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.set-1)
- [`LocalKey::<RefCell<T>>::take`]
  (https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.take-1)
- [`LocalKey::<RefCell<T>>::replace`]
  (https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.replace-1)

These APIs are now stable in const contexts:

- [`rc::Weak::new`]
  (https://doc.rust-lang.org/stable/alloc/rc/struct.Weak.html#method.new)
- [`sync::Weak::new`]
  (https://doc.rust-lang.org/stable/alloc/sync/struct.Weak.html#method.new)
- [`NonNull::as_ref`]
  (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.as_ref)

Cargo
-----

- [Encode URL params correctly for `SourceId` in `Cargo.lock`.]
  (rust-lang/cargo#12280)
- [Bail out an error when using `cargo::` in custom build script.]
  (rust-lang/cargo#12332)

Misc
----

Compatibility Notes
-------------------

- [Update the minimum external LLVM to 15.]
  (rust-lang/rust#114148)
- [Check for non-defining uses of return position `impl Trait`.]
  (rust-lang/rust#112842)

Internal Changes
----------------

These changes do not affect any public interfaces of Rust, but they
represent significant improvements to the performance or internals
of rustc and related tools.

- [Remove LLVM pointee types, supporting only opaque pointers.]
  (rust-lang/rust#105545)
- [Port PGO/LTO/BOLT optimized build pipeline to Rust.]
  (rust-lang/rust#112235)
- [Replace in-tree `rustc_apfloat` with the new version of the crate.]
  (rust-lang/rust#113843)
- [Update to LLVM 17.]
  (rust-lang/rust#114048)
- [Add `internal_features` lint for internal unstable features.]
  (rust-lang/rust#108955)
- [Mention style for new syntax in tracking issue template.]
  (rust-lang/rust#113586)
@kalil-pelissier kalil-pelissier mentioned this pull request Jan 26, 2024
Merged
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A-testsuite Area: The testsuite used to check the correctness of rustc disposition-merge This issue / PR is in PFCP or FCP with a disposition to merge it. finished-final-comment-period The final comment period is finished for this PR / Issue. I-lang-nominated The issue / PR has been nominated for discussion during a lang team meeting. merged-by-bors This PR was explicitly merged by bors. relnotes Marks issues that should be documented in the release notes of the next release. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-lang Relevant to the language team, which will review and decide on the PR/issue.
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