On Friday, 18 January 2019 at 07:48:21 UTC, Rainer Schuetze wrote: > Debugging experience will likely improve if you build the > runtime library with debug information. (see > https://wiki.dlang.org/Building_under_Posix). He's using LDC, so he'll just need to specify `-link-defaultlib-debug` in the LDC command line.