The error was:

```
[00:05:25] tidy error: /checkout/src/libcore/num/mod.rs:3848: trailing whitespace
[00:05:25] tidy error: /checkout/src/libcore/num/mod.rs:3851: line longer than 100 chars
[00:05:25] tidy error: /checkout/src/libcore/num/mod.rs:3851: trailing whitespace
[00:05:26] some tidy checks failed
```
The line was truncated to 92 characters.

This commit fixes an ICE in rustc when `#[target_feature]` was applied to items
other than functions due to the way the feature was validated.

…athbuf, r=alexcrichton

Implement FromStr for PathBuf

Closes rust-lang#44431.

…matsakis

[NLL] Make causal tracking lazy

Close rust-lang#46590

cc @nikomatsakis

…omatsakis

Replace iterator structures with `impl Trait`.

Two commits:

* Replace iterator structures with `impl Trait`.
* Run rustfmt on `src/librustc_data_structures/graph/mod.rs`.

…ause, r=joshtriplett

Add a potential cause raising `ParseIntError`.

Initially, I wanted to add it directly to the documentation of `str. parse()` method, I finally found that it was more relevant (I hope so?) to directly document the structure in question. I've added a scenario, in which we could all get caught at least once, to make it easier to diagnose the problem when parsing integers.

…michaelwoerister

rustc: Fix ICE with `#[target_feature]` on module

This commit fixes an ICE in rustc when `#[target_feature]` was applied to items
other than functions due to the way the feature was validated.

…=QuietMisdreavus

Fix sidebar horizontal scroll

Just like @onur said.

r? @QuietMisdreavus

Move REGISTERED_DIAGNOSTICS to a ParseSess field

r? @michaelwoerister