Rollup of 10 pull requests#84679

Closed

jackh726 wants to merge 24 commits into

rust-lang:masterfrom

jackh726:rollup-lhuthna

Commits on Apr 24, 2021

Ignore commented out lines when finding features
syvb
committed

Commits on Apr 25, 2021

Build sanitizers for x86_64-unknown-linux-musl
12101111
committed
Set `backtrace-on-ice` by default for compiler and codegen profiles
jyn514
committed
Add starting anchor

syvb
and
Joshua Nelson
authored

Commits on Apr 26, 2021

Point out that behavior might be switched on 2015 and 2018 editions too one day
est31
committed

Commits on Apr 27, 2021

Add a paragraph with possible alternatives on older editions
est31
committed

Commits on Apr 28, 2021