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Previously, when borrowck failed it would taint all promoteds within the MIR body. An attempt to evaluated the promoteds would subsequently fail with spurious "note: erroneous constant used". For example: ```console ... note: erroneous constant used --> tests/ui/borrowck/tainted-promoteds.rs:7:9 | 7 | a = &0 * &1 * &2 * &3; | ^^ note: erroneous constant used --> tests/ui/borrowck/tainted-promoteds.rs:7:14 | 7 | a = &0 * &1 * &2 * &3; | ^^ note: erroneous constant used --> tests/ui/borrowck/tainted-promoteds.rs:7:19 | 7 | a = &0 * &1 * &2 * &3; | ^^ note: erroneous constant used --> tests/ui/borrowck/tainted-promoteds.rs:7:24 | 7 | a = &0 * &1 * &2 * &3; | ^^ ``` Borrowck failure doesn't indicate that there is anything wrong with promoteds. Leave them untainted.
15 lines
466 B
Plaintext
15 lines
466 B
Plaintext
error[E0384]: cannot assign twice to immutable variable `a`
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--> $DIR/tainted-promoteds.rs:7:5
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LL | let a = 0;
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| -
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| first assignment to `a`
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| help: consider making this binding mutable: `mut a`
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LL | a = &0 * &1 * &2 * &3;
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| ^^^^^^^^^^^^^^^^^^^^^ cannot assign twice to immutable variable
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error: aborting due to previous error
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For more information about this error, try `rustc --explain E0384`.
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