If user never gave an explicit name

Fixes rust-lang#119731

Fixes rust-lang#116599

Fixes rust-lang#114464

…c_const_exprs rust-lang#113133

Fixes rust-lang#113133

…d: Leaf(0x0000000000000000) }]) is not fully resolved rust-lang#113045

Fixes rust-lang#113045

Fixes rust-lang#108220

…sued, expected ReFree to map to ReEarlyBound rust-lang#108580

Fixes rust-lang#108580

Fixes rust-lang#109020

…ype, None in compiler/rustc_mir_build/src/build/expr/as_place.rs rust-lang#110453

Fixes rust-lang#110453

…with default method and no impls

Fixes rust-lang#109869

Rustc gives a warning when compiling proc macros with panic=abort.

…ister

Don't emit an error about failing to produce a file with a specific name if user never gave an explicit name

Fixes rust-lang#122509

You can ask `rustc` to produce some intermediate results with `--emit foo`, this operation comes in two flavors: `--emit asm` and `--emit asm=foo.s`. First one produces one or more `.s` files without any name guarantees, second one renames it into `foo.s`. Second version only works when compiler produces a single file - for asm files this means using a single compilation unit for example.

In case compilation produced more than a single file `rustc` runs following check to emit some warnings:

```rust
            if crate_output.outputs.contains_key(&output_type) {
                // 2) Multiple codegen units, with `--emit foo=some_name`. We have
                //    no good solution for this case, so warn the user.
                sess.dcx().emit_warn(errors::IgnoringEmitPath { extension });
            } else if crate_output.single_output_file.is_some() {
                // 3) Multiple codegen units, with `-o some_name`. We have
                //    no good solution for this case, so warn the user.
                sess.dcx().emit_warn(errors::IgnoringOutput { extension });
            } else {
                // 4) Multiple codegen units, but no explicit name. We
                //    just leave the `foo.0.x` files in place.
                // (We don't have to do any work in this case.)
            }
```

Comment in the final `else` branch implies that if user didn't ask for a specific name - there's no need to emit warnings. However because of the internal representation of `crate_output.outputs` - this doesn't work as expected: if user asked to produce an asm file without giving it an implicit name it will contain `Some(None)`.

To fix the problem new code actually checks if user gave an explicit name. I think this was an original intentional behavior, at least comments imply that.

…trochenkov

Delegation: fix ICE on `bound_vars` divergence

Fixes rust-lang#122550.

Bug was caused by divergence  between lowered type and corresponding `bound_vars` in `late_bound_vars_map`. In this patch `bound_vars` calculation for delegation item is moved from `lower_fn_ty` to `resolve_bound_vars` query.

r? `@petrochenkov`

…h-pat-only, r=petrochenkov

Validate that we're only matching on unit struct for path pattern

Resolution doesn't validate that we only really take `CtorKind::Unit` in path patterns, since all it sees is `Res::SelfCtor(def_id)`. Check this instead during pattern typeck.

r? petrochenkov

Fixes rust-lang#122809

…acrum

Use `chunk_by` when building `ReverseSccGraph`

With stable `chunk_by` in Rust 1.77, this code doesn't need `Itertools::group_by` anymore.

add even more tests!

Fixes rust-lang#109869
Fixes rust-lang#110453
Fixes rust-lang#109020
Fixes rust-lang#108580
Fixes rust-lang#108220
Fixes rust-lang#113045
Fixes rust-lang#113133
Fixes rust-lang#114464
Fixes rust-lang#116599
Fixes rust-lang#119731

…t, r=petrochenkov

Fix unpretty UI test when /tmp does not exist

On Windows this test fails if e.g. `C:\tmp` is created successfully

Rename `{enter,exit}_lint_attrs` to `check_attributes{,_post}`

Several places in Clippy want to check all the attributes of a node, we end up using `hir().attrs()` from several different `check_` functions (e.g. [in our doc lints](https://github.com/rust-lang/rust-clippy/blob/95c62ffae9bbce793f68a6f1473e3fc24af19bdd/clippy_lints/src/doc/mod.rs#L396)) but this is error prone, we recently found that doc lints weren't triggering on struct fields for example

I went to add a `check_attributes` function but realised `enter_lint_attrs` is already this, the rename is to encourage their use

Also removes `LateContextAndPass::visit_attribute` since it's unused - `visit_attribute` for HIR visitors is only called by `hir().walk_attributes()` which lint passes do not use

…losure, r=bjorn3

Add `async-closures/once.rs` back to cranelift tests

This was fixed afaict by rust-lang#120717

r? `@bjorn3`

…rors

Add a bunch of needs-unwind annotations to tests

To filter out tests that fail with cg_clif due to missing panic=unwind support.