rust/tests/ui/issues/issue-24819.rs

use std::collections::HashSet;

fn main() {
    let mut v = Vec::new();
    foo(&mut v);
    //~^ ERROR mismatched types
    //~| expected struct `HashSet`, found struct `Vec`
}

fn foo(h: &mut HashSet<u32>) {
}
refactor autoderef to avoid registering obligations Refactor `FnCtxt::autoderef` to use an external iterator and to not register any obligation from the main autoderef loop, but rather to register them after (and if) the loop successfully completes. Fixes #24819 Fixes #25801 Fixes #27631 Fixes #31258 Fixes #31964 Fixes #32320 Fixes #33515 Fixes #33755 2016-05-24 11:37:11 +00:00			`use std::collections::HashSet;`

			`fn main() {`
			`let mut v = Vec::new();`
			`foo(&mut v);`
			`//~^ ERROR mismatched types`
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 07:40:56 +00:00			//~\| expected struct `HashSet`, found struct `Vec`
refactor autoderef to avoid registering obligations Refactor `FnCtxt::autoderef` to use an external iterator and to not register any obligation from the main autoderef loop, but rather to register them after (and if) the loop successfully completes. Fixes #24819 Fixes #25801 Fixes #27631 Fixes #31258 Fixes #31964 Fixes #32320 Fixes #33515 Fixes #33755 2016-05-24 11:37:11 +00:00			`}`

			`fn foo(h: &mut HashSet<u32>) {`
			`}`