Rollup of 4 pull requests - #67866

Merged

bors merged 11 commits into

rust-lang:masterfrom

GuillaumeGomez:rollup-32vsg5b

Jan 4, 2020

Commits on Jan 3, 2020

Revert `const_err` lint checking of casts
wesleywiser
committed
8e4886d
improve generic `Drop` error messages
euclio
committed
e589358
clarify that `Drop` can be implemented for enums and unions too
euclio
committed
e9990bc
Small error explanations cleanup
GuillaumeGomez
committed
ec64bbb
Clean up E0164 explanation
GuillaumeGomez
committed
aab4276
Remove unused `#[link_name = "m"]` attributes
ollie27
committed
83333fe

Commits on Jan 4, 2020