Fix ICE with impl Trait #49730
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Fix ICE with impl Trait #49730
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Fix ICE with impl Trait Fixes rust-lang#49556 (comment). May or may not fix 49556 itself. Closures like `|x: &'a _| x` has `ClosureSubsts` of `fn(&'a _) -> &'(ReScope) _`, so `tcx.note_and_explain_free_region` (called [here](https://github.com/rust-lang/rust/blob/a143462783cec88b7b733e8aa09990bfeb59f754/src/librustc/infer/anon_types/mod.rs#L572)) panics.
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Rollup of 14 pull requests Successful merges: - #49525 (Use sort_by_cached_key where appropriate) - #49575 (Stabilize `Option::filter`.) - #49614 (in which the non-shorthand patterns lint keeps its own counsel in macros) - #49665 (Small nits to make couple of tests pass on mips targets.) - #49781 (add regression test for #16223 (NLL): use of collaterally moved value) - #49795 (Properly look for uninhabitedness of variants in niche-filling check) - #49809 (Stop emitting color codes on TERM=dumb) - #49856 (Do not uppercase-lint #[no_mangle] statics) - #49863 (fixed typo) - #49857 (Fix "fp" target feature for AArch64) - #49849 (Add --enable-debug flag to musl CI build script) - #49734 (proc_macro: Generalize `FromIterator` impl) - #49730 (Fix ICE with impl Trait) - #48270 (Replace `structurally_resolved_type` in casts check.) Failed merges:
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Fixes #49556 (comment). May or may not fix 49556 itself. Closures like
|x: &'a _| xhasClosureSubstsoffn(&'a _) -> &'(ReScope) _, sotcx.note_and_explain_free_region(called here) panics.