Cargo doc test not colored

[pickfire]

Problem

Steps

1. cargo +nightly t

Possible Solution(s)

Most likely some flags not passed to rustc.

Notes

Output of cargo version: cargo 1.45.0-nightly (9fcb8c1d2 2020-05-25)

> uname -a
Linux arch 5.6.15-zen2-1-zen rust-lang/cargo#1 ZEN SMP PREEMPT Thu, 28 May 2020 16:49:25 +0000 x86_64 GNU/Linux
> os/distro
Arch Linux
> rustup --version
rustup 1.21.1 (7832b2ebe 2019-12-20)
# release channel
nightly

[ehuss]

Thanks for the report. I have transferred this to rust-lang/rust, because this is a rustdoc issue. I could have sworn there was already an issue for this, but I can't find it. I recall investigating this in the past, and the fix wasn't exactly trivial.

[pickfire]

Yes, I think this might have been a regression. Maybe we have a regression test this time but I am not sure if the tests are able to check color.