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8221f9c837
On functions with a default return type that influences the coerced type
of `match` arms, check if the failing arm is actually of type `!`. If
so, suggest changing the return type so the coercion against the prior
arms is successful.
```
error[E0308]: `match` arms have incompatible types
--> $DIR/match-tail-expr-never-type-error.rs:9:13
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LL | fn bar(a: bool) {
| - help: try adding a return type: `-> i32`
LL | / match a {
LL | | true => 1,
| | - this is found to be of type `{integer}`
LL | | false => {
LL | | never()
| | ^^^^^^^
| | |
| | expected integer, found `()`
| | this expression is of type `!`, but it get's coerced to `()` due to its surrounding expression
LL | | }
LL | | }
| |_____- `match` arms have incompatible types
```
Fix #24157.
22 lines
760 B
Plaintext
22 lines
760 B
Plaintext
error[E0308]: `match` arms have incompatible types
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--> $DIR/match-tail-expr-never-type-error.rs:9:13
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LL | fn bar(a: bool) {
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| - help: try adding a return type: `-> i32`
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LL | / match a {
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LL | | true => 1,
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| | - this is found to be of type `{integer}`
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LL | | false => {
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LL | | never()
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| | ^^^^^^^
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| | |
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| | expected integer, found `()`
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| | this expression is of type `!`, but it is coerced to `()` due to its surrounding expression
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LL | | }
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LL | | }
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| |_____- `match` arms have incompatible types
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error: aborting due to 1 previous error
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For more information about this error, try `rustc --explain E0308`.
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