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Reduce optimization level #149428

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Reduce optimization level #149428

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3 changes: 3 additions & 0 deletions Cargo.toml
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Expand Up @@ -59,6 +59,9 @@ exclude = [
"obj",
]

[profile.release]
opt-level = 1

[profile.release.package.rustc_thread_pool]
# The rustc fork of Rayon has deadlock detection code which intermittently
# causes overflows in the CI (see https://github.com/rust-lang/rust/issues/90227)
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4 changes: 4 additions & 0 deletions src/bootstrap/src/core/builder/cargo.rs
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Expand Up @@ -1387,6 +1387,10 @@ impl Builder<'_> {
rustflags.arg("-Zmir_strip_debuginfo=locals-in-tiny-functions");
}

if !matches!(mode, Mode::Std) {
cargo.env(cargo_profile_var("OPT_LEVEL", &self.config), "1");
}

// take target-specific extra rustflags if any otherwise take `rust.rustflags`
let extra_rustflags = self
.config
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