D-Programming-Language/dmd — pull request #3334 by 9rnsr (2014-02-25 14:58:37+00:00)
Title: [REG2.065] Issue 12243 - "ICE: cannot append 'char' to 'string'" with -inline

https://d.puremagic.com/issues/show_bug.cgi?id=12243

Perhaps the root cause of the ICEs were the lack of the handling for comma expressions.