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Rollup merge of #136580 - bjorn3:miri_fixes, r=lqd

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Couple of changes to run rustc in miri

This is not the full set of patches required to run rustc in miri, but it is the fast majority of the changes to rustc itself. There is also a change to the jobserver crate necessary and on arm64 a change to the memchr crate. Running rustc in miri has already found some UB: https://github.com/rust-lang/rust/pull/136579

cc https://github.com/rust-lang/rust/issues/135870#issuecomment-2612470540
This commit is contained in:
Matthias Krüger 2025-02-06 21:56:27 +01:00 • committed by GitHub
commit 3eb1ef836e
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4 changed files with 24 additions and 12 deletions
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compiler/rustc_errors/src/emitter.rs
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@ -1765,7 +1765,7 @@ impl HumanEmitter {
let column_width = if let Some(width) = self.diagnostic_width {
width.saturating_sub(code_offset)
} else if self.ui_testing {
} else if self.ui_testing || cfg!(miri) {
DEFAULT_COLUMN_WIDTH
} else {
termize::dimensions()