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.
16 lines
373 B
Rust
16 lines
373 B
Rust
// Verify the compiler fails with an error on infinite function
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// recursions.
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// build-fail
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fn generic<T>() { //~ WARN function cannot return without recursing
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generic::<Option<T>>();
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}
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//~^^ ERROR reached the recursion limit while instantiating `generic::<Option<
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fn main () {
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// Use generic<T> at least once to trigger instantiation.
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generic::<i32>();
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}
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