https://issues.dlang.org/show_bug.cgi?id=20812
m...@ernestocastellotti.it changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |m...@ernestocastellotti.it --- Comment #2 from m...@ernestocastellotti.it --- I investigate this bug and the problem is that ti.key (field of TypeInfo_AssociativeArray) is null. The sigsegv obviously occurs at this line https://github.com/dlang/dmd/blob/342a226833a0e9c7a90bbb64ae8dc35aa6d6bfdc/druntime/src/rt/aaA.d#L766 I'm trying to figure out what the reason for this would be and how to fix it. --