https://issues.dlang.org/show_bug.cgi?id=12143
--- Comment #2 from github-bugzi...@puremagic.com --- Commits pushed to master at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/d73783b44738f97d2ae05c50bd6b804c6b8389ef fix Issue 12143 - Base class is forward referenced https://github.com/D-Programming-Language/dmd/commit/050707d1b1079bff15f3770fb6b5e8db1015a20a Merge pull request #3384 from 9rnsr/refactor_aggregate Issue 12078 & 12143 & 12555 & 11622 - Separate class hierarchy calculation from class member semantics --