Rollup of 11 pull requests#84951

Closed

Dylan-DPC-zz wants to merge 23 commits intorust-lang:masterfrom

Dylan-DPC-zz:rollup-mijzfjm

Commits on Apr 29, 2021

Simplify chdir implementation and minimize unsafe block
joshtriplett
committed

Commits on Apr 30, 2021

Commits on May 1, 2021

Report coverage `0` of dead blocks
Rich Kadel
committed
Move coverage tests from run-make-fulldeps to run-make
Rich Kadel
committed

Commits on May 2, 2021

Account for unsatisfied bounds in E0599
estebank
committed

Commits on May 5, 2021