param1=<error reading variable: Cannot access memory at address 0xffffffffffffffe0>, fmt=<error reading variable: Cannot access memory at address 0xfffffffffffffff0>) at ../../.dub/packages/vibe-d-0.7.21-rc.3/source/vibe/core/log.d:116
There's a warning commented about 2 lines below:
116: foreach (l; getLoggers())
117: if (l.minLevel <= level) { // WARNING: TYPE SYSTEM HOLE: accessing field of shared class!
Might be a good idea to fix this before looking into it more