07e7823c01
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.
29 lines
1.1 KiB
Plaintext
29 lines
1.1 KiB
Plaintext
error: lifetime may not live long enough
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--> $DIR/object-lifetime-default-from-box-error.rs:18:5
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LL | fn load(ss: &mut SomeStruct) -> Box<dyn SomeTrait> {
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| -- has type `&mut SomeStruct<'1>`
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...
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LL | ss.r
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| ^^^^ returning this value requires that `'1` must outlive `'static`
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error[E0507]: cannot move out of `ss.r` which is behind a mutable reference
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--> $DIR/object-lifetime-default-from-box-error.rs:18:5
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LL | ss.r
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| ^^^^ move occurs because `ss.r` has type `Box<dyn SomeTrait>`, which does not implement the `Copy` trait
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error[E0621]: explicit lifetime required in the type of `ss`
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--> $DIR/object-lifetime-default-from-box-error.rs:31:5
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LL | fn store1<'b>(ss: &mut SomeStruct, b: Box<dyn SomeTrait+'b>) {
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| --------------- help: add explicit lifetime `'b` to the type of `ss`: `&mut SomeStruct<'b>`
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...
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LL | ss.r = b;
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| ^^^^ lifetime `'b` required
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error: aborting due to 3 previous errors
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Some errors have detailed explanations: E0507, E0621.
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For more information about an error, try `rustc --explain E0507`.
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