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Bail out of MIR construction if
check_match fails
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| // regression test for #108683 | ||
| // edition:2021 | ||
|
|
||
| enum Refutable { | ||
| A, | ||
| B, | ||
| } | ||
|
|
||
| fn example(v1: u32, v2: [u32; 4], v3: Refutable) { | ||
| const PAT: u32 = 0; | ||
| let v4 = &v2[..]; | ||
| || { | ||
| let 0 = v1; //~ ERROR refutable pattern in local binding | ||
| let (0 | 1) = v1; //~ ERROR refutable pattern in local binding | ||
| let 1.. = v1; //~ ERROR refutable pattern in local binding | ||
| let [0, 0, 0, 0] = v2; //~ ERROR refutable pattern in local binding | ||
| let [0] = v4; //~ ERROR refutable pattern in local binding | ||
| let Refutable::A = v3; //~ ERROR refutable pattern in local binding | ||
| let PAT = v1; //~ ERROR refutable pattern in local binding | ||
| }; | ||
| } | ||
|
|
||
| fn main() {} |
113 changes: 113 additions & 0 deletions
113
tests/ui/closures/2229_closure_analysis/bad-pattern.stderr
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| error[E0005]: refutable pattern in local binding | ||
| --> $DIR/bad-pattern.rs:13:13 | ||
| | | ||
| LL | let 0 = v1; | ||
| | ^ pattern `1_u32..=u32::MAX` not covered | ||
| | | ||
| = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant | ||
| = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html | ||
| = note: the matched value is of type `u32` | ||
| help: you might want to use `if let` to ignore the variant that isn't matched | ||
| | | ||
| LL | if let 0 = v1 { todo!() }; | ||
| | ++ +++++++++++ | ||
| help: alternatively, you could prepend the pattern with an underscore to define a new named variable; identifiers cannot begin with digits | ||
| | | ||
| LL | let _0 = v1; | ||
| | + | ||
|
|
||
| error[E0005]: refutable pattern in local binding | ||
| --> $DIR/bad-pattern.rs:14:14 | ||
| | | ||
| LL | let (0 | 1) = v1; | ||
| | ^^^^^ pattern `2_u32..=u32::MAX` not covered | ||
| | | ||
| = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant | ||
| = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html | ||
| = note: the matched value is of type `u32` | ||
| help: you might want to use `if let` to ignore the variant that isn't matched | ||
| | | ||
| LL | if let (0 | 1) = v1 { todo!() }; | ||
| | ++ +++++++++++ | ||
|
|
||
| error[E0005]: refutable pattern in local binding | ||
| --> $DIR/bad-pattern.rs:15:13 | ||
| | | ||
| LL | let 1.. = v1; | ||
| | ^^^ pattern `0_u32` not covered | ||
| | | ||
| = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant | ||
| = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html | ||
| = note: the matched value is of type `u32` | ||
| help: you might want to use `if let` to ignore the variant that isn't matched | ||
| | | ||
| LL | if let 1.. = v1 { todo!() }; | ||
| | ++ +++++++++++ | ||
|
|
||
| error[E0005]: refutable pattern in local binding | ||
| --> $DIR/bad-pattern.rs:16:13 | ||
| | | ||
| LL | let [0, 0, 0, 0] = v2; | ||
| | ^^^^^^^^^^^^ pattern `[1_u32..=u32::MAX, _, _, _]` not covered | ||
| | | ||
| = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant | ||
| = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html | ||
| = note: the matched value is of type `[u32; 4]` | ||
| help: you might want to use `if let` to ignore the variant that isn't matched | ||
| | | ||
| LL | if let [0, 0, 0, 0] = v2 { todo!() }; | ||
| | ++ +++++++++++ | ||
|
|
||
| error[E0005]: refutable pattern in local binding | ||
| --> $DIR/bad-pattern.rs:17:13 | ||
| | | ||
| LL | let [0] = v4; | ||
| | ^^^ patterns `&[]` and `&[_, _, ..]` not covered | ||
| | | ||
| = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant | ||
| = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html | ||
| = note: the matched value is of type `&[u32]` | ||
| help: you might want to use `if let` to ignore the variants that aren't matched | ||
| | | ||
| LL | if let [0] = v4 { todo!() }; | ||
| | ++ +++++++++++ | ||
|
|
||
| error[E0005]: refutable pattern in local binding | ||
| --> $DIR/bad-pattern.rs:18:13 | ||
| | | ||
| LL | let Refutable::A = v3; | ||
| | ^^^^^^^^^^^^ pattern `Refutable::B` not covered | ||
| | | ||
| = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant | ||
| = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html | ||
| note: `Refutable` defined here | ||
| --> $DIR/bad-pattern.rs:4:6 | ||
| | | ||
| LL | enum Refutable { | ||
| | ^^^^^^^^^ | ||
| LL | A, | ||
| LL | B, | ||
| | - not covered | ||
| = note: the matched value is of type `Refutable` | ||
| help: you might want to use `if let` to ignore the variant that isn't matched | ||
| | | ||
| LL | if let Refutable::A = v3 { todo!() }; | ||
| | ++ +++++++++++ | ||
|
|
||
| error[E0005]: refutable pattern in local binding | ||
| --> $DIR/bad-pattern.rs:19:13 | ||
| | | ||
| LL | let PAT = v1; | ||
| | ^^^ | ||
| | | | ||
| | pattern `1_u32..=u32::MAX` not covered | ||
| | missing patterns are not covered because `PAT` is interpreted as a constant pattern, not a new variable | ||
| | help: introduce a variable instead: `PAT_var` | ||
| | | ||
| = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant | ||
| = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html | ||
| = note: the matched value is of type `u32` | ||
|
|
||
| error: aborting due to 7 previous errors | ||
|
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||
| For more information about this error, try `rustc --explain E0005`. |