'<' followed by a letter makes cargo doc hang on nightly

[tiby312]

If I run cargo doc on the below code, it never finishes.

///<a
fn main() {
    println!("Hello, world!");
}

I expected to see it finish.

Problem does not exist on stable

[jonas-schievink]

cc @rust-lang/rustdoc

[tmiasko]

Fixed upstream in pulldown-cmark/pulldown-cmark#438, but not released yet.

[GuillaumeGomez]

Let's hope next version will be released soon then! :)

[ollie27]

Unfortunately this also affects 1.43 beta.

[Mark-Simulacrum]

Hm so this will hit stable in less than a week then. Do we consider it high priority enough to try to push through a release ourselves? (e.g. we can temporarily fork or whatever, perhaps only on the beta branch).

I personally lean towards no but wouldn't be opposed to doing so if t-rustdoc wanted to.

[sjackman]

This issue halted development at our company for a day until we bisected the issue down to the particular line of code (a comment) that was causing cargo test to hang indefinitely. 😢

Thank you for all of your hard work on Rust. It is my most favourite language. I've been waiting for a suitable replacement for C++, and it has arrived! 😁

[Mark-Simulacrum]

Looks like there's movement on a point release, pulldown-cmark/pulldown-cmark#439.

I would be in favor of backporting this to beta, since it's a really painful bug to hit...