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When encountering <&T as Clone>::clone(x) because T: Clone, suggest #[derive(Clone)] #121471

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merged 1 commit into from
Feb 23, 2024
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When encountering <&T as Clone>::clone(x) because T: Clone, suggest #[derive(Clone)] #121471

merged 1 commit into from
Feb 23, 2024

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estebank
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CC #40699.

warning: call to `.clone()` on a reference in this situation does nothing
  --> $DIR/noop-method-call.rs:23:71
   |
LL |     let non_clone_type_ref_clone: &PlainType<u32> = non_clone_type_ref.clone();
   |                                                                       ^^^^^^^^
   |
   = note: the type `PlainType<u32>` does not implement `Clone`, so calling `clone` on `&PlainType<u32>` copies the reference, which does not do anything and can be removed
help: remove this redundant call
   |
LL -     let non_clone_type_ref_clone: &PlainType<u32> = non_clone_type_ref.clone();
LL +     let non_clone_type_ref_clone: &PlainType<u32> = non_clone_type_ref;
   |
help: if you meant to clone `PlainType<u32>`, implement `Clone` for it
   |
LL + #[derive(Clone)]
LL | struct PlainType<T>(T);
   |

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rustbot commented Feb 22, 2024

r? @TaKO8Ki

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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 Feb 22, 2024
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TaKO8Ki commented Feb 22, 2024

@bors r+ rollup

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bors commented Feb 22, 2024

📌 Commit 6017de4 has been approved by TaKO8Ki

It is now in the queue for this repository.

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 22, 2024
@estebank estebank mentioned this pull request Feb 22, 2024
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@matthiaskrgr matthiaskrgr mentioned this pull request Feb 23, 2024
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bors added a commit to rust-lang-ci/rust that referenced this pull request Feb 23, 2024
@bors
Auto merge of rust-lang#121491 - matthiaskrgr:rollup-wkzqawy, r=matth…
fdf8b29 
…iaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#121434 (Fix rust-lang#121208 fallout)
 - rust-lang#121471 (When encountering `<&T as Clone>::clone(x)` because `T: Clone`, suggest `#[derive(Clone)]`)
 - rust-lang#121476 (remove `llvm.assertions=true` in compiler profile)
 - rust-lang#121479 (fix generalizer unsoundness)
 - rust-lang#121480 (Fix more rust-lang#121208 fallout)
 - rust-lang#121482 (Allow for a missing `adt_def` in `NamePrivacyVisitor`.)
 - rust-lang#121484 (coverage: Use variable name `this` in `CoverageGraph::from_mir`)
 - rust-lang#121487 (Explicitly call `emit_stashed_diagnostics`.)

r? `@ghost`
`@rustbot` modify labels: rollup
bors added a commit to rust-lang-ci/rust that referenced this pull request Feb 23, 2024
@bors
Auto merge of rust-lang#121491 - matthiaskrgr:rollup-wkzqawy, r=matth…
52cea08 
…iaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#121434 (Fix rust-lang#121208 fallout)
 - rust-lang#121471 (When encountering `<&T as Clone>::clone(x)` because `T: Clone`, suggest `#[derive(Clone)]`)
 - rust-lang#121476 (remove `llvm.assertions=true` in compiler profile)
 - rust-lang#121479 (fix generalizer unsoundness)
 - rust-lang#121480 (Fix more rust-lang#121208 fallout)
 - rust-lang#121482 (Allow for a missing `adt_def` in `NamePrivacyVisitor`.)
 - rust-lang#121484 (coverage: Use variable name `this` in `CoverageGraph::from_mir`)
 - rust-lang#121487 (Explicitly call `emit_stashed_diagnostics`.)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 86727df into rust-lang:master Feb 23, 2024
11 checks passed
@rustbot rustbot added this to the 1.78.0 milestone Feb 23, 2024
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request Feb 23, 2024
@rust-timer
Unrolled build for rust-lang#121471
52f223a 
Rollup merge of rust-lang#121471 - estebank:lint-clone, r=TaKO8Ki

When encountering `<&T as Clone>::clone(x)` because `T: Clone`, suggest `#[derive(Clone)]`

CC rust-lang#40699.

```
warning: call to `.clone()` on a reference in this situation does nothing
  --> $DIR/noop-method-call.rs:23:71
   |
LL |     let non_clone_type_ref_clone: &PlainType<u32> = non_clone_type_ref.clone();
   |                                                                       ^^^^^^^^
   |
   = note: the type `PlainType<u32>` does not implement `Clone`, so calling `clone` on `&PlainType<u32>` copies the reference, which does not do anything and can be removed
help: remove this redundant call
   |
LL -     let non_clone_type_ref_clone: &PlainType<u32> = non_clone_type_ref.clone();
LL +     let non_clone_type_ref_clone: &PlainType<u32> = non_clone_type_ref;
   |
help: if you meant to clone `PlainType<u32>`, implement `Clone` for it
   |
LL + #[derive(Clone)]
LL | struct PlainType<T>(T);
   |
```
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