Some trait methods don't appear in the documentation for types that implement the trait

[ahjones]

Location

This is a documentation bug on this page specifically:

https://doc.rust-lang.org/std/io/struct.BufReader.html#impl-BufRead-for-BufReader%3CR%3E

I believe I've seen the same issue elsewhere, but I don't have an example to hand right now.

Summary

Here's a specific example: the doc for Bufreader doesn't include the method lines in the Bufreader impl section. Other methods like has_data_left are documented. Both has_data_left and lines are default methods, and yet only one of them is described.

It's causing an issue because I can't find if a method is implemented on a structure by searching through the structure's documentation.

[Manishearth]

I suspect this is due to the ?Sized bound and the where Self: Sized. Seems like a bug.

[compiler-errors]

This is likely due to #100221. I'll cook up some logic to make sure we handle the ambiguities correctly.