rust/tests/rustdoc-ui/error-in-impl-trait/README.md

Each of these needs to be in a separate file,
because the `delay_span_bug` ICE in rustdoc won't be triggerred
if even a single other error was emitted.

However, conceptually they are all testing basically the same thing.
See https://github.com/rust-lang/rust/pull/73566#issuecomment-653689128
for more details.
Recurse into function bodies, but don't typeck closures Previously, rustdoc would issue a delay_span_bug ICE on the following code: ```rust pub fn a() -> impl Fn() -> u32 { \|\| content::doesnt::matter() } ``` This wasn't picked up earlier because having `type Alias = impl Trait;` in the same module caused _all closures_ to be typechecked, even if they wouldn't normally. Additionally, if _any_ error was emitted, no delay_span_bug would be emitted. So as part of this commit all of the tests were separated out into different files. 2020-07-09 08:13:59 -05:00			`Each of these needs to be in a separate file,`
			because the `delay_span_bug` ICE in rustdoc won't be triggerred
			`if even a single other error was emitted.`

			`However, conceptually they are all testing basically the same thing.`
			`See https://github.com/rust-lang/rust/pull/73566#issuecomment-653689128`
			`for more details.`