mirror of https://github.com/rust-lang/rust
29 lines
709 B
Rust
29 lines
709 B
Rust
//@ run-pass
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// Regression test for Issue #30530: alloca's created for storing
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// intermediate scratch values during brace-less match arms need to be
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// initialized with their drop-flag set to "dropped" (or else we end
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// up running the destructors on garbage data at the end of the
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// function).
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pub enum Handler {
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Default,
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#[allow(dead_code)]
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Custom(*mut Box<dyn Fn()>),
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}
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fn main() {
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#[allow(unused_must_use)] {
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take(Handler::Default, Box::new(main));
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}
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}
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#[inline(never)]
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pub fn take(h: Handler, f: Box<dyn Fn()>) -> Box<dyn Fn()> {
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unsafe {
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match h {
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Handler::Custom(ptr) => *Box::from_raw(ptr),
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Handler::Default => f,
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}
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}
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}
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