Put back zeroing; issues 29092, 30018, 30530, 30822#30823

bors merged 7 commits intorust-lang:masterrust-lang/rust:masterfrom

pnkfelix:put-back-alloca-zeroing-for-issue-30530pnkfelix/rust:put-back-alloca-zeroing-for-issue-30530Copy head branch name to clipboard