D-Programming-Language/dmd — pull request #3608 by rainers (2014-05-31 12:21:11+00:00)
Title: fix 12826: make a copy of the second argument to _d_arrayappendT to avoid aliasing

https://issues.dlang.org/show_bug.cgi?id=12826

If it is possible to figure out that the second argument is not an alias to the first, the copy could be avoided.