Can't build documentation

[michaelmior]

When trying to build documentation for my crate which uses peg and peg-syntax-ext, I get the following error

warning: source code was requested to be rendered, but processing `<peg expansion>` had an error: No such file or directory (os error 2)

[kevinmehall]

Interesting find. It's just a warning, not an error; docs are still built, but it complains that it can't find the source code to format for the [src] link in the docs.

Looking at the rustdoc source code, we could make rustdoc ignore it by changing the fake filename to <peg macros>, but it might also make sense to patch rustdoc to ignore everything in angle brackets, as it's clearly not a real file.

[kevinmehall]

This is apparently a recent rustc/rustdoc regression: rust-lang/rust#43371

[michaelmior]

Yes, it is just a warning, although documentation is not built in my case.

[kevinmehall]

No longer seeing this with the latest rustc nightly.