37 lines
951 B
Rust
37 lines
951 B
Rust
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// compile-flags: -O
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// ignore-debug: the debug assertions get in the way
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#![crate_type = "lib"]
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#![feature(shrink_to)]
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// Make sure that `Vec::shrink_to_fit` never emits panics via `RawVec::shrink_to_fit`,
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// "Tried to shrink to a larger capacity", because the length is *always* <= capacity.
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// CHECK-LABEL: @shrink_to_fit
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#[no_mangle]
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pub fn shrink_to_fit(vec: &mut Vec<u32>) {
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// CHECK-NOT: panic
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vec.shrink_to_fit();
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}
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// CHECK-LABEL: @issue71861
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#[no_mangle]
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pub fn issue71861(n: usize) -> Box<[u32]> {
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// CHECK-NOT: panic
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vec![0; n].into_boxed_slice()
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}
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// CHECK-LABEL: @issue75636
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#[no_mangle]
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pub fn issue75636<'a>(iter: &[&'a str]) -> Box<[&'a str]> {
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// CHECK-NOT: panic
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iter.iter().copied().collect()
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}
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// Sanity-check that we do see a possible panic for an arbitrary `Vec::shrink_to`.
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// CHECK-LABEL: @shrink_to
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#[no_mangle]
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pub fn shrink_to(vec: &mut Vec<u32>) {
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// CHECK: panic
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vec.shrink_to(42);
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}
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