Rollup merge of #41637 - eddyb:used-not-dead, r=petrochenkov
Don't ever warn about #[used] items being dead code. Fixes #41628 by whitelisting `#[used]` items in `rustc::middle::dead`.
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commit
43cb7c4212
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@ -283,6 +283,12 @@ fn has_allow_dead_code_or_lang_attr(attrs: &[ast::Attribute]) -> bool {
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return true;
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}
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// #[used] also keeps the item alive forcefully,
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// e.g. for placing it in a specific section.
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if attr::contains_name(attrs, "used") {
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return true;
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}
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let dead_code = lint::builtin::DEAD_CODE.name_lower();
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for attr in lint::gather_attrs(attrs) {
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match attr {
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@ -0,0 +1,17 @@
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// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![deny(dead_code)]
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#![feature(used)]
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#[used]
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static FOO: u32 = 0;
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fn main() {}
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