rust/src/test/ui/block-result/issue-13428.stderr
Dan Aloni 07e7823c01 pretty: trim paths of unique symbols
If a symbol name can only be imported from one place for a type, and
as long as it was not glob-imported anywhere in the current crate, we
can trim its printed path and print only the name.

This has wide implications on error messages with types, for example,
shortening `std::vec::Vec` to just `Vec`, as long as there is no other
`Vec` importable anywhere.

This adds a new '-Z trim-diagnostic-paths=false' option to control this
feature.

On the good path, with no diagnosis printed, we should try to avoid
issuing this query, so we need to prevent trimmed_def_paths query on
several cases.

This change also relies on a previous commit that differentiates
between `Debug` and `Display` on various rustc types, where the latter
is trimmed and presented to the user and the former is not.
2020-09-02 22:26:37 +03:00

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error[E0308]: mismatched types
--> $DIR/issue-13428.rs:3:13
|
LL | fn foo() -> String {
| --- ^^^^^^ expected struct `String`, found `()`
| |
| implicitly returns `()` as its body has no tail or `return` expression
...
LL | ;
| - help: consider removing this semicolon
error[E0308]: mismatched types
--> $DIR/issue-13428.rs:11:13
|
LL | fn bar() -> String {
| --- ^^^^^^ expected struct `String`, found `()`
| |
| implicitly returns `()` as its body has no tail or `return` expression
LL | "foobar".to_string()
LL | ;
| - help: consider removing this semicolon
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0308`.