Fix some diagnostic issues with const_generics_defaults feature gate#85800

Merged

bors merged 4 commits intorust-lang:masterfrom

BoxyUwU:const-param-default-diagnostics

Jun 12, 2021

Commits on May 29, 2021

Commits on Jun 7, 2021

note :sparkles: uwuuu
BoxyUwU
committed

Commits on Jun 8, 2021

use non_erasable_generics
BoxyUwU
committed