D-Programming-Language/dmd — pull request #2749 by 9rnsr (2013-11-12 14:16:50+00:00)
Title: Issue 11489 - Improper implicit cast to immutable.

https://d.puremagic.com/issues/show_bug.cgi?id=11489

Nostalgic const conversion bug. We really need to effort to write exhaustive test.