D-Programming-Language/dmd — pull request #3711 by 9rnsr (2014-07-04 17:16:14+00:00)
Title: [REG2.066a] Issue 12255 - opCmp requirement for AAs breaks code

https://issues.dlang.org/show_bug.cgi?id=12255

AAs should require equality and hashing for key types.

This PR is based on #3710 to guarantee correct hashing of AA keys.