fix some uses of pointer intrinsics with invalid pointers#53804

Merged

bors merged 2 commits intorust-lang:masterfrom

RalfJung:ptr-invalid

Sep 16, 2018

Commits on Aug 29, 2018

fix some uses of pointer intrinsics with invalid pointers
RalfJung
committed

Commits on Sep 16, 2018

use mem::zeroed to make up ZST values
RalfJung
committed