Rollup of 10 pull requests#64883

Merged

bors merged 26 commits intorust-lang:masterfrom

Centril:rollup-uehjt63

Sep 29, 2019

Commits on Sep 25, 2019

Create new error code E0734 for stability attributes used outside of standard library
GuillaumeGomez
committed

Commits on Sep 26, 2019

Fix format macro expansions spans to be macro-generated
rinon
committed

Commits on Sep 28, 2019