…smute_obligation_for_reporting`

Lex and parse emoji in lifetimes, and disallow them in the parser with a hard error. Allow emoji to start a lifetime name even if they are not XID_Start.

```
error: lifetimes cannot contain emoji
  --> $DIR/emoji-in-lifetime.rs:1:22
   |
LL | fn bad_lifetime_name<'🐛🐛🐛family👨👩👧👦>(
   |                      ^^^^^^^^^^^^^^^^^^^^^
```

avoid ICE on invalid param-env normalization

remove 120033 crash test

fix comments

use rustc_no_implicit_bounds

set #![allow(incomplete_features)]

Remove the `compiler-builtins` feature from default because it prevents
testing via the default `cargo test` command. It made more sense as a
default when `compiler-builtins` was a dependency that some crates added
via crates.io, but is no longer needed.

The `rustc-dep-of-std` feature is also removed since it doesn't do
anything beyond what the `compiler-builtins` feature already does.

compiler-builtins: Clean up features

Remove the `compiler-builtins` feature from default because it prevents
testing via the default `cargo test` command. It made more sense as a
default when `compiler-builtins` was a dependency that some crates added
via crates.io, but is no longer needed.

The `rustc-dep-of-std` feature is also removed since it doesn't do
anything beyond what the `compiler-builtins` feature already does.

…-normalization-ice, r=lcnr

Avoid ICE when param-env normalization leaves unresolved inference variables

Fixes rust-lang#153354

Because the impl is already ill-formed, those variables are not fully constrained, so zfully_resolve` fails. We previously treated that as an immediate compiler bug with `span_bug!`, which caused an ICE on invalid input.

…donszelmann,bjorn3

Fix EII function aliases eliminated by LTO

Add EII function aliases to `llvm.compiler.used` so that LLVM's LTO passes do not eliminate them.

Fixes rust-lang#153645

Tracking issue: rust-lang#125418

…r=jdonszelmann

Fix regression when dealing with generics/values with unresolved inference

Follow up for rust-lang#151703, fixing regression caused in rollup rust-lang#152825

Forgot to handle generics & unresolved inference variables (as in `get_safe_transmute_error_and_reason`) in my previous PR. This followup checks for them before trying to normalize.

I am not completely sure its right approach to have this check cloned but as `select_transmute_obligation_for_reporting` fn just chooses obligation and doesn't actually return an error, this check shouldn't be removed from `get_safe_transmute_error_and_reasnon`. If there is any better solution, let me kmow.

Fixes: rust-lang#153755

r? @jdonszelmann

…lmann,Veykril

Lex lifetimes as identifiers, recover from emoji and emit appropriate error

Lex and parse emoji in lifetimes by using the identifier logic, and disallow them in the parser with a hard error. Allow emoji to start a lifetime name even if they are not XID_Start.

```
error: identifiers cannot contain emoji: `'🐛🐛🐛family👨👩👧👦`
  --> $DIR/emoji-in-lifetime.rs:1:22
   |
LL | fn bad_lifetime_name<'🐛🐛🐛family👨👩👧👦>(
   |                      ^^^^^^^^^^^^^^^^^^^^^
```

Address rust-lang#141081 (but we could provide more information in the diagnostic, pointing at the specific chars, providing a link to the reference on identifiers and/or some other extra information).

…o, r=jdonszelmann

refactor: move doc(rust_logo) check to parser

Reducing `check_attr.rs` size by moving the `#[doc(rust_logo)]` feature gate into `DocParser`.

…t-ne-suggestion-span, r=JohnTitor

Skip suggestions pointing to macro def for assert_eq

Fixes rust-lang#146204

It's better to suggest:
```console
help: consider borrowing here
 --> src/main.rs:3:16
  |
 3|      assert_ne!(&buf, b"----");
  |                 +
```
but i don't want to give a too heuristic but not general enough fix, let suppress them.