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Rollup of 6 pull requests #95552

Merged
merged 15 commits into from
Apr 1, 2022
Merged

Rollup of 6 pull requests #95552

merged 15 commits into from
Apr 1, 2022

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matthiaskrgr
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Successful merges:

Failed merges:

r? @ghost
@rustbot modify labels: rollup

Create a similar rollup

compiler-errors and others added 15 commits March 23, 2022 21:46
Before:

```
Item { name: Some("Send"), attrs: Attributes { doc_strings: [DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:15:1: 15:60 (#0), parent_module: None, doc: " Types that can be transferred across thread boundaries.", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:16:1: 16:4 (#0), parent_module: None, doc: "", kind: SugaredDoc, indent: 0 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:17:1: 17:78 (#0), parent_module: None, doc: " This trait is automatically implemented when the compiler determines it's", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:18:1: 18:17 (#0), parent_module: None, doc: " appropriate.", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:19:1: 19:4 (#0), parent_module: None, doc: "", kind: SugaredDoc, indent: 0 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:20:1: 20:70 (#0), parent_module: None, doc: " An example of a non-`Send` type is the reference-counting pointer", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:21:1: 21:85 (#0), parent_module: None, doc: " [`rc::Rc`][`Rc`]. If two threads attempt to clone [`Rc`]s that point to the same", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:22:1: 22:81 (#0), parent_module: None, doc: " reference-counted value, they might try to update the reference count at the", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:23:1: 23:83 (#0), parent_module: None, doc: " same time, which is [undefined behavior][ub] because [`Rc`] doesn't use atomic", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:24:1: 24:84 (#0), parent_module: None, doc: " operations. Its cousin [`sync::Arc`][arc] does use atomic operations (incurring", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:25:1: 25:39 (#0), parent_module: None, doc: " some overhead) and thus is `Send`.", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:26:1: 26:4 (#0), parent_module: None, doc: "", kind: SugaredDoc, indent: 0 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:27:1: 27:74 (#0), parent_module: None, doc: " See [the Nomicon](../../nomicon/send-and-sync.html) for more details.", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:28:1: 28:4 (#0), parent_module: None, doc: "", kind: SugaredDoc, indent: 0 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:29:1: 29:40 (#0), parent_module: None, doc: " [`Rc`]: ../../std/rc/struct.Rc.html", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:30:1: 30:42 (#0), parent_module: None, doc: " [arc]: ../../std/sync/struct.Arc.html", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:31:1: 31:61 (#0), parent_module: None, doc: " [ub]: ../../reference/behavior-considered-undefined.html", kind: SugaredDoc, indent: 1 }], other_attrs: [Attribute { kind: Normal(AttrItem { path: Path { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:3: 32:9 (#0), segments: [PathSegment { ident: stable#0, id: NodeId(33577), args: None }], tokens: None }, args: Delimited(DelimSpan { open: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:9: 32:10 (#0), close: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:44: 32:45 (#0) }, Parenthesis, TokenStream([(Token(Token { kind: Ident("feature", false), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:10: 32:17 (#0) }), Alone), (Token(Token { kind: Eq, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:18: 32:19 (#0) }), Alone), (Token(Token { kind: Literal(Lit { kind: Str, symbol: "rust1", suffix: None }), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:20: 32:27 (#0) }), Joint), (Token(Token { kind: Comma, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:27: 32:28 (#0) }), Alone), (Token(Token { kind: Ident("since", false), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:29: 32:34 (#0) }), Alone), (Token(Token { kind: Eq, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:35: 32:36 (#0) }), Alone), (Token(Token { kind: Literal(Lit { kind: Str, symbol: "1.0.0", suffix: None }), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:37: 32:44 (#0) }), Alone)])), tokens: None }, None), id: AttrId(48), style: Outer, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:1: 32:46 (#0) }, Attribute { kind: Normal(AttrItem { path: Path { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:33:23: 33:44 (#0), segments: [PathSegment { ident: rustc_diagnostic_item#0, id: NodeId(33578), args: None }], tokens: None }, args: Eq(/rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:33:45: 33:46 (#0), Token { kind: Literal(Lit { kind: Str, symbol: "Send", suffix: None }), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:33:47: 33:53 (#0) }), tokens: None }, None), id: AttrId(49), style: Outer, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:33:23: 33:53 (#0) }, Attribute { kind: Normal(AttrItem { path: Path { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:34:3: 34:25 (#0), segments: [PathSegment { ident: rustc_on_unimplemented#0, id: NodeId(33580), args: None }], tokens: None }, args: Delimited(DelimSpan { open: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:34:25: 34:26 (#0), close: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:37:1: 37:2 (#0) }, Parenthesis, TokenStream([(Token(Token { kind: Ident("message", false), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:35:5: 35:12 (#0) }), Alone), (Token(Token { kind: Eq, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:35:13: 35:14 (#0) }), Alone), (Token(Token { kind: Literal(Lit { kind: Str, symbol: "`{Self}` cannot be sent between threads safely", suffix: None }), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:35:15: 35:63 (#0) }), Joint), (Token(Token { kind: Comma, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:35:63: 35:64 (#0) }), Alone), (Token(Token { kind: Ident("label", false), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:36:5: 36:10 (#0) }), Alone), (Token(Token { kind: Eq, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:36:11: 36:12 (#0) }), Alone), (Token(Token { kind: Literal(Lit { kind: Str, symbol: "`{Self}` cannot be sent between threads safely", suffix: None }), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:36:13: 36:61 (#0) }), Alone)])), tokens: None }, None), id: AttrId(50), style: Outer, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:34:1: 37:3 (#0) }] }, visibility: Public, kind: TraitItem(Trait { unsafety: Unsafe, items: [], generics: Generics { params: [], where_predicates: [] }, bounds: [], is_auto: true }), def_id: DefId(DefId(2:3027 ~ core[7f4a]::marker::Send)), cfg: None }
```

After:

```
Item { name: Some("Send"), visibility: Public, def_id: DefId(DefId(2:3027 ~ core[7f4a]::marker::Send)), kind: Trait, docs: "Types that can be transferred across thread boundaries.\n\nThis trait is automatically implemented when the compiler determines it's\nappropriate.\n\nAn example of a non-`Send` type is the reference-counting pointer\n[`rc::Rc`][`Rc`]. If two threads attempt to clone [`Rc`]s that point to the same\nreference-counted value, they might try to update the reference count at the\nsame time, which is [undefined behavior][ub] because [`Rc`] doesn't use atomic\noperations. Its cousin [`sync::Arc`][arc] does use atomic operations (incurring\nsome overhead) and thus is `Send`.\n\nSee [the Nomicon](../../nomicon/send-and-sync.html) for more details.\n\n[`Rc`]: ../../std/rc/struct.Rc.html\n[arc]: ../../std/sync/struct.Arc.html\n[ub]: ../../reference/behavior-considered-undefined.html" }
```
Clean up, categorize and sort unstable features in std.
Better suggestions for `Fn`-family trait selection errors

1. Suppress suggestions to add `std::ops::Fn{,Mut,Once}` bounds when a type already implements `Fn{,Mut,Once}`
2. Add a note that points out that a type does in fact implement `Fn{,Mut,Once}`, but the arguments vary (either by number or by actual arguments)
3. Add a note that points out that a type does in fact implement `Fn{,Mut,Once}`, but not the right one (e.g. implements `FnMut`, but `Fn` is required).

Fixes rust-lang#95147
suggest wrapping single-expr blocks in square brackets

Suggests a fix in cases like:

```diff
- const A: [i32; 1] = { 1 };

+ const A: [i32; 1] = [ 1 ];
                      ^   ^
```

Also edit the message for the same suggestion in the parser (e.g. `{ 1, 2 }`).

Fixes rust-lang#95289
Make `impl Debug for rustdoc::clean::Item` easier to read

Before:

```
Item { name: Some("Send"), attrs: Attributes { doc_strings: [DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:15:1: 15:60 (#0), parent_module: None, doc: " Types that can be transferred across thread boundaries.", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:16:1: 16:4 (#0), parent_module: None, doc: "", kind: SugaredDoc, indent: 0 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:17:1: 17:78 (#0), parent_module: None, doc: " This trait is automatically implemented when the compiler determines it's", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:18:1: 18:17 (#0), parent_module: None, doc: " appropriate.", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:19:1: 19:4 (#0), parent_module: None, doc: "", kind: SugaredDoc, indent: 0 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:20:1: 20:70 (#0), parent_module: None, doc: " An example of a non-`Send` type is the reference-counting pointer", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:21:1: 21:85 (#0), parent_module: None, doc: " [`rc::Rc`][`Rc`]. If two threads attempt to clone [`Rc`]s that point to the same", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:22:1: 22:81 (#0), parent_module: None, doc: " reference-counted value, they might try to update the reference count at the", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:23:1: 23:83 (#0), parent_module: None, doc: " same time, which is [undefined behavior][ub] because [`Rc`] doesn't use atomic", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:24:1: 24:84 (#0), parent_module: None, doc: " operations. Its cousin [`sync::Arc`][arc] does use atomic operations (incurring", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:25:1: 25:39 (#0), parent_module: None, doc: " some overhead) and thus is `Send`.", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:26:1: 26:4 (#0), parent_module: None, doc: "", kind: SugaredDoc, indent: 0 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:27:1: 27:74 (#0), parent_module: None, doc: " See [the Nomicon](../../nomicon/send-and-sync.html) for more details.", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:28:1: 28:4 (#0), parent_module: None, doc: "", kind: SugaredDoc, indent: 0 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:29:1: 29:40 (#0), parent_module: None, doc: " [`Rc`]: ../../std/rc/struct.Rc.html", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:30:1: 30:42 (#0), parent_module: None, doc: " [arc]: ../../std/sync/struct.Arc.html", kind: SugaredDoc, indent: 1 }, DocFragment { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:31:1: 31:61 (#0), parent_module: None, doc: " [ub]: ../../reference/behavior-considered-undefined.html", kind: SugaredDoc, indent: 1 }], other_attrs: [Attribute { kind: Normal(AttrItem { path: Path { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:3: 32:9 (#0), segments: [PathSegment { ident: stable#0, id: NodeId(33577), args: None }], tokens: None }, args: Delimited(DelimSpan { open: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:9: 32:10 (#0), close: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:44: 32:45 (#0) }, Parenthesis, TokenStream([(Token(Token { kind: Ident("feature", false), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:10: 32:17 (#0) }), Alone), (Token(Token { kind: Eq, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:18: 32:19 (#0) }), Alone), (Token(Token { kind: Literal(Lit { kind: Str, symbol: "rust1", suffix: None }), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:20: 32:27 (#0) }), Joint), (Token(Token { kind: Comma, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:27: 32:28 (#0) }), Alone), (Token(Token { kind: Ident("since", false), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:29: 32:34 (#0) }), Alone), (Token(Token { kind: Eq, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:35: 32:36 (#0) }), Alone), (Token(Token { kind: Literal(Lit { kind: Str, symbol: "1.0.0", suffix: None }), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:37: 32:44 (#0) }), Alone)])), tokens: None }, None), id: AttrId(48), style: Outer, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:32:1: 32:46 (#0) }, Attribute { kind: Normal(AttrItem { path: Path { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:33:23: 33:44 (#0), segments: [PathSegment { ident: rustc_diagnostic_item#0, id: NodeId(33578), args: None }], tokens: None }, args: Eq(/rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:33:45: 33:46 (#0), Token { kind: Literal(Lit { kind: Str, symbol: "Send", suffix: None }), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:33:47: 33:53 (#0) }), tokens: None }, None), id: AttrId(49), style: Outer, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:33:23: 33:53 (#0) }, Attribute { kind: Normal(AttrItem { path: Path { span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:34:3: 34:25 (#0), segments: [PathSegment { ident: rustc_on_unimplemented#0, id: NodeId(33580), args: None }], tokens: None }, args: Delimited(DelimSpan { open: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:34:25: 34:26 (#0), close: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:37:1: 37:2 (#0) }, Parenthesis, TokenStream([(Token(Token { kind: Ident("message", false), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:35:5: 35:12 (#0) }), Alone), (Token(Token { kind: Eq, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:35:13: 35:14 (#0) }), Alone), (Token(Token { kind: Literal(Lit { kind: Str, symbol: "`{Self}` cannot be sent between threads safely", suffix: None }), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:35:15: 35:63 (#0) }), Joint), (Token(Token { kind: Comma, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:35:63: 35:64 (#0) }), Alone), (Token(Token { kind: Ident("label", false), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:36:5: 36:10 (#0) }), Alone), (Token(Token { kind: Eq, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:36:11: 36:12 (#0) }), Alone), (Token(Token { kind: Literal(Lit { kind: Str, symbol: "`{Self}` cannot be sent between threads safely", suffix: None }), span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:36:13: 36:61 (#0) }), Alone)])), tokens: None }, None), id: AttrId(50), style: Outer, span: /rustc/37b55c8a0cafdb60b9168da34f904acc70157df8/library/core/src/marker.rs:34:1: 37:3 (#0) }] }, visibility: Public, kind: TraitItem(Trait { unsafety: Unsafe, items: [], generics: Generics { params: [], where_predicates: [] }, bounds: [], is_auto: true }), def_id: DefId(DefId(2:3027 ~ core[7f4a]::marker::Send)), cfg: None }
```

After:

```
Item { name: Some("Send"), visibility: Public, def_id: DefId(DefId(2:3027 ~ core[7f4a]::marker::Send)), kind: Trait, docs: "Types that can be transferred across thread boundaries.\n\nThis trait is automatically implemented when the compiler determines it's\nappropriate.\n\nAn example of a non-`Send` type is the reference-counting pointer\n[`rc::Rc`][`Rc`]. If two threads attempt to clone [`Rc`]s that point to the same\nreference-counted value, they might try to update the reference count at the\nsame time, which is [undefined behavior][ub] because [`Rc`] doesn't use atomic\noperations. Its cousin [`sync::Arc`][arc] does use atomic operations (incurring\nsome overhead) and thus is `Send`.\n\nSee [the Nomicon](../../nomicon/send-and-sync.html) for more details.\n\n[`Rc`]: ../../std/rc/struct.Rc.html\n[arc]: ../../std/sync/struct.Arc.html\n[ub]: ../../reference/behavior-considered-undefined.html" }
```

The previous output is still present if you really want it for some reason by using `{:#?}` instead of `{:?}`.

r? `@camelid`
interpret: make isize::MAX the limit for dynamic value sizes

We are currently enforcing `data_layout.obj_size_bound()` as the maximal dynamic size of a Rust value (including for `size_of_val_raw`), but that does not match the docs.

In particular, Miri currently falsely says that this code has UB:
```rust
#![feature(layout_for_ptr)]
fn main() {
    let size = isize::MAX as usize;
    // Creating a raw slice of size isize::MAX and asking for its size is okay.
    let s = std::ptr::slice_from_raw_parts(1usize as *const u8, size);
    assert_eq!(size, unsafe { std::mem::size_of_val_raw(s) });
}
```
@rustbot rustbot added T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue. rollup A PR which is a rollup labels Apr 1, 2022
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@bors r+ rollup=never p=6

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bors commented Apr 1, 2022

📌 Commit c6750e4 has been approved by matthiaskrgr

@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 Apr 1, 2022
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bors commented Apr 1, 2022

⌛ Testing commit c6750e4 with merge dfc72a01342dcf501dfd996d1e3f036d6c09299e...

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bors commented Apr 1, 2022

💥 Test timed out

@bors bors added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Apr 1, 2022
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@bors retry

@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 Apr 1, 2022
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bors commented Apr 1, 2022

⌛ Testing commit c6750e4 with merge 9f05ab25ff78615e9eca8dbb1ec4a5e1a56d6661...

@matthiaskrgr matthiaskrgr reopened this Apr 1, 2022
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@bors retry

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A job failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

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A job failed! Check out the build log: (web) (plain)

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bors commented Apr 1, 2022

⌛ Testing commit c6750e4 with merge 297a801...

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bors commented Apr 1, 2022

☀️ Test successful - checks-actions
Approved by: matthiaskrgr
Pushing 297a801 to master...

@bors bors added the merged-by-bors This PR was explicitly merged by bors. label Apr 1, 2022
@bors bors merged commit 297a801 into rust-lang:master Apr 1, 2022
@rustbot rustbot added this to the 1.61.0 milestone Apr 1, 2022
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📣 Toolstate changed by #95552!

Tested on commit 297a801.
Direct link to PR: #95552

💔 miri on windows: test-pass → test-fail (cc @eddyb @RalfJung @oli-obk).
💔 miri on linux: test-pass → test-fail (cc @eddyb @RalfJung @oli-obk).

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Finished benchmarking commit (297a801): comparison url.

Summary: This benchmark run did not return any relevant results.

If you disagree with this performance assessment, please file an issue in rust-lang/rustc-perf.

@rustbot label: -perf-regression

@matthiaskrgr matthiaskrgr deleted the rollup-bxminn9 branch July 30, 2022 10:32
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