https://issues.dlang.org/show_bug.cgi?id=1550 --- Comment #7 from Rainer Schuetze <r.sagitario at gmx.de> --- The pull request for the dmc runtime has been merged https://github.com/DigitalMars/dmc/pull/3 , but there has never been an update to the released snn.lib AFAICT. --