Matthias Krüger d02a221d31 Rollup merge of #102945 - compiler-errors:placeholder-region-outlives, r=lcnr ...

Do not register placeholder `RegionOutlives` obligations when `considering_regions` is false

**NOTE:** I'm kinda just putting this up for discussion. I'm not certain this is correct...?

This was introduced in [`608625d`](https://github.com/rust-lang/rust/commit/608625dae95cde00e4570eb6c2d63b2244bbf34c#diff-6e54b18681342ec725d75591dbf384ad08cd73df29db00485fe51b4e90f76ff7R361).

Interestingly, we only check `data.has_placeholders()` for `RegionOutlives`, and not for `TypeOutlives`... why? For the record, that different treatment between `RegionOutlives` and `TypeOutlives` is why the fix "The compiling succeeds when all `'a : 'b` are replaced with `&'a () : 'b`" in #100689 _"works"_, but it seems like an implementation detail considering this.

Also, why do we care about placeholder regions being registered if `considering_regions` is false? It doesn't seem to affect any UI tests, for example.

r? `@lcnr`

Fixes #102899
Fixes #100689

2022-10-17 17:15:50 +02:00

..

src

Rollup merge of #102945 - compiler-errors:placeholder-region-outlives, r=lcnr

2022-10-17 17:15:50 +02:00

Cargo.toml

Remove from compiler/ crates

2022-09-29 16:49:04 +09:00