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a1a3abb08f
``` error[E0505]: cannot move out of `a` because it is borrowed --> $DIR/variance-issue-20533.rs:28:14 | LL | let a = AffineU32(1); | - binding `a` declared here LL | let x = foo(&a); | -- borrow of `a` occurs here LL | drop(a); | ^ move out of `a` occurs here LL | drop(x); | - borrow later used here | help: consider cloning the value if the performance cost is acceptable | LL | let x = foo(&a).clone(); | ++++++++ ```
63 lines
1.2 KiB
Rust
63 lines
1.2 KiB
Rust
// Regression test for issue #20533. At some point, only 1 out of the
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// 3 errors below were being reported.
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use std::marker::PhantomData;
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fn foo<'a, T>(_x: &'a T) -> PhantomData<&'a ()> {
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PhantomData
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}
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struct Wrap<T>(T);
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fn bar<'a, T>(_x: &'a T) -> Wrap<PhantomData<&'a ()>> {
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Wrap(PhantomData)
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}
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struct Baked<'a>(PhantomData<&'a ()>);
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fn baz<'a, T>(_x: &'a T) -> Baked<'a> {
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Baked(PhantomData)
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}
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fn bat(x: &AffineU32) -> &u32 {
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&x.0
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}
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struct AffineU32(u32);
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#[derive(Clone)]
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struct ClonableAffineU32(u32);
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fn main() {
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{
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let a = AffineU32(1);
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let x = foo(&a);
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drop(a); //~ ERROR cannot move out of `a`
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drop(x);
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}
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{
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let a = AffineU32(1);
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let x = bar(&a);
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drop(a); //~ ERROR cannot move out of `a`
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drop(x);
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}
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{
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let a = AffineU32(1);
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let x = baz(&a);
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drop(a); //~ ERROR cannot move out of `a`
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drop(x);
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}
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{
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let a = AffineU32(1);
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let x = bat(&a);
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drop(a); //~ ERROR cannot move out of `a`
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drop(x);
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}
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{
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let a = ClonableAffineU32(1);
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let x = foo(&a);
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drop(a); //~ ERROR cannot move out of `a`
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drop(x);
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}
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}
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