rust/tests/ui/issues/issue-21763.rs

// Regression test for HashMap only impl'ing Send/Sync if its contents do

use std::collections::HashMap;
use std::rc::Rc;

fn foo<T: Send>() {}

fn main() {
    foo::<HashMap<Rc<()>, Rc<()>>>();
    //~^ ERROR `Rc<()>` cannot be sent between threads safely
}
make Send/Sync impl of RawTable manual 2015-01-29 22:18:45 -05:00			`// Regression test for HashMap only impl'ing Send/Sync if its contents do`

			`use std::collections::HashMap;`
			`use std::rc::Rc;`

			`fn foo<T: Send>() {}`

			`fn main() {`
			`foo::<HashMap<Rc<()>, Rc<()>>>();`
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 10:40:56 +03:00			//~^ ERROR `Rc<()>` cannot be sent between threads safely
make Send/Sync impl of RawTable manual 2015-01-29 22:18:45 -05:00			`}`