Fix for "ambiguous associated type" issue with ATBs#61919

Merged

bors merged 8 commits intorust-lang:masterfrom

alexreg:fix-atb-1

Aug 7, 2019

Commits on Aug 5, 2019

A few cosmetic improvements.
alexreg
committed
Got rid of concept of 'principal trait' in more places in codebase.
alexreg
committed
Ensure `type_param_predicates` fn only returns predicates for type param with given def-ID.
alexreg
committed
useful comments

nikomatsakis
authored and
Alexander Regueiro
committed
useful debug

nikomatsakis
authored and
Alexander Regueiro
committed
Added test for issue.
alexreg
committed
Added another test.
alexreg
committed
Changed tests to check-pass.
alexreg
committed