On Monday, 25 July 2016 at 07:33:25 UTC, Yuxuan Shui wrote: > Valgrind reports double free anyways. I think it's just the > inaccuracy of the glibc double free detection. Please file a bug - thanks! https://issues.dlang.org/ I found this, maybe related: https://issues.dlang.org/show_bug.cgi?id=16046