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Fix diagnostic suggests adding type `[type error]` 

Fixes #79040

Unresolved questions:

Why does this change output the diagnostic twice?

Why does the CI fail when the errors are pointed out (UI tests)?
This commit is contained in:
Henry Boisdequin 2021-03-03 16:50:07 +05:30
parent 1279b3b923
commit d9d69212c3
5 changed files with 27 additions and 21 deletions
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2
compiler/rustc_typeck/src/collect/type_of.rs
View File

@ -659,7 +659,7 @@ fn infer_placeholder_type(
format!("{}: {}", item_ident, ty),
Applicability::MachineApplicable,
)
.emit();
.emit_unless(matches!(ty.kind(), ty::Error(_)));
}
None => {
let mut diag = bad_placeholder_type(tcx, vec![span]);

5
src/test/ui/79040.rs Normal file
View File

@ -0,0 +1,5 @@
fn main() {
const FOO = "hello" + 1;
//^~ ERROR cannot add `{integer}` to `&str`
println!("{}", FOO);
}

19
src/test/ui/79040.stderr Normal file
View File

@ -0,0 +1,19 @@
error[E0369]: cannot add `{integer}` to `&str`
--> $DIR/79040.rs:2:25
|
LL | const FOO = "hello" + 1;
| ------- ^ - {integer}
| |
| &str
error[E0369]: cannot add `{integer}` to `&str`
--> $DIR/79040.rs:2:25
|
LL | const FOO = "hello" + 1;
| ------- ^ - {integer}
| |
| &str
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0369`.

8
src/test/ui/parser/item-free-const-no-body-semantic-fail.stderr
View File

@ -14,11 +14,5 @@ LL | const B;
| |
| help: provide a definition for the constant: `= <expr>;`
error: missing type for `const` item
--> $DIR/item-free-const-no-body-semantic-fail.rs:6:7
|
LL | const B;
| ^ help: provide a type for the item: `B: [type error]`
error: aborting due to 3 previous errors
error: aborting due to 2 previous errors

14
src/test/ui/parser/item-free-static-no-body-semantic-fail.stderr
View File

@ -30,17 +30,5 @@ LL | static mut D;
| |
| help: provide a definition for the static: `= <expr>;`
error: missing type for `static` item
--> $DIR/item-free-static-no-body-semantic-fail.rs:6:8
|
LL | static B;
| ^ help: provide a type for the item: `B: [type error]`
error: missing type for `static mut` item
--> $DIR/item-free-static-no-body-semantic-fail.rs:10:12
|
LL | static mut D;
| ^ help: provide a type for the item: `D: [type error]`
error: aborting due to 6 previous errors
error: aborting due to 4 previous errors