mirror of https://github.com/rust-lang/rust
59 lines
1.7 KiB
Plaintext
59 lines
1.7 KiB
Plaintext
error[E0070]: invalid left-hand side of assignment
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--> $DIR/assign-non-lval-derefmut.rs:5:23
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LL | x.lock().unwrap() = 2;
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| ----------------- ^
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| cannot assign to this expression
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help: consider dereferencing here to assign to the mutably borrowed value
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LL | *x.lock().unwrap() = 2;
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| +
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error[E0368]: binary assignment operation `+=` cannot be applied to type `MutexGuard<'_, usize>`
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--> $DIR/assign-non-lval-derefmut.rs:7:5
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LL | x.lock().unwrap() += 1;
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| -----------------^^^^^
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| cannot use `+=` on type `MutexGuard<'_, usize>`
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help: `+=` can be used on `usize` if you dereference the left-hand side
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LL | *x.lock().unwrap() += 1;
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| +
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error[E0308]: mismatched types
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--> $DIR/assign-non-lval-derefmut.rs:11:9
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LL | let mut y = x.lock().unwrap();
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| ----------------- expected due to this value
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LL | y = 2;
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| ^ expected `MutexGuard<'_, usize>`, found integer
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= note: expected struct `MutexGuard<'_, usize>`
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found type `{integer}`
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help: consider dereferencing here to assign to the mutably borrowed value
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LL | *y = 2;
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| +
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error[E0368]: binary assignment operation `+=` cannot be applied to type `MutexGuard<'_, usize>`
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--> $DIR/assign-non-lval-derefmut.rs:13:5
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LL | y += 1;
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| -^^^^^
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| cannot use `+=` on type `MutexGuard<'_, usize>`
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help: `+=` can be used on `usize` if you dereference the left-hand side
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LL | *y += 1;
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| +
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error: aborting due to 4 previous errors
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Some errors have detailed explanations: E0070, E0308, E0368.
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For more information about an error, try `rustc --explain E0070`.
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