The output of `rustc -C help` generally has one option per line. There was one
exception because of a (presumably) forgotten line continuation escape.

We don't see a reason to explicitly pass the default here, so just use
the default instead of explicitly passing it and needing an ifdef.

@rustbot label: +llvm-main

…, r=dtolnay

Stabilise `const_char_encode_utf16`.

Closes: rust-lang#130660

This PR stabilises the `const_char_encode_utf16` feature gate (i.e. support for `char::encode_utf16` in constant expressions).

~~Note that the linked tracking issue is as of this writing currently awaiting FCP until 2024-11-02.~~

…=cuviper

PassWrapper: adapt for llvm/llvm-project@b01e2a8b5620466c3b

A boolean turned into an enum. None matches the old behavior of false, so we pass that.

`@rustbot` label: +llvm-main

…r=jieyouxu

coverage: Regression test for inlining into an uninstrumented crate

Regression test for rust-lang#132395, after I was able to figure out a simple way to reproduce it. See also rust-lang#132436.

In addition to confirming that there is no ICE, this test also demonstrates that the affected code is undercounted, because executing the inlined copy doesn't increment coverage counters.

…manieu

get rid of a whole bunch of unnecessary rustc_const_unstable attributes

In general, when a `const fn` is still unstable, it doesn't need a `#[rustc_const_unstable]` attribute. The only exception is functions that internally use things that can't be used in stable const fn yet.

So this gets rid of a whole bunch of `#[rustc_const_unstable]` in libcore.

NFC add known bug nr to test

r? `@jieyouxu`

…r=compiler-errors

make codegen help output more consistent

The output of `rustc -C help` generally has one option per line. There was one exception because of a (presumably) forgotten line continuation escape.

…ompiler-errors

Added regression test for generics index out of bounds

Added a regression test for  rust-lang#117446
This ICE was fixed in Rust 1.75 but a regression test was never added.

This PR adds a UI test with a reduced version of the original bug report that does not rely on external crates.

… r=jieyouxu

Use `*_opt` typeck results fns to not ICE in fallback suggestion

Self-explanatory. Fixes rust-lang#132517.