Rollup of 6 pull requests - #84153

Merged

bors merged 14 commits into

rust-lang:masterfrom

Dylan-DPC-zz:rollup-5jiqrwu

Apr 13, 2021

Commits on Mar 26, 2021

Update RELEASES.md
CDirkx
committed
64cf7ad

Commits on Mar 31, 2021

Remove T: Debug bound on UnsafeCell Debug impl
exrook
committed
58218f6

Commits on Apr 12, 2021

Stabilize BTree{Map,Set}::retain
workingjubilee
committed
7baeaa9
Stabilize duration_zero.
m-ou-se
committed
d1e23b8
Mark Duration::is_zero as rustc_const_stable.
m-ou-se
committed
b44ae96
don't bump in check_mistyped_turbofish_with_multiple_type_params
b-naber
committed
dd54459
add test
b-naber
committed
4dfaa78
Fix typo in error message
camelid
committed
1e26358

Commits on Apr 13, 2021