[beta] backports#88400

Merged

bors merged 6 commits intorust-lang:betafrom

Mark-Simulacrum:beta-next

Aug 28, 2021

Commits on Aug 27, 2021

Split critical edge targeting the start block

tmiasko
authored and
Mark-Simulacrum
committed
make `BuildHasher` object safe

ibraheemdev
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Mark-Simulacrum
committed
move object safety test to library/core

ibraheemdev
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Mark-Simulacrum
committed
Fix Windows Command::env("PATH")

ChrisDenton
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Mark-Simulacrum
committed
Do not ICE on HIR based WF check when involving lifetimes

estebank
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Mark-Simulacrum
committed
Update compiler_builtins to fix i128 shift/mul on thumbv6m

Amanieu
authored and
Mark-Simulacrum
committed