On Tuesday, 19 October 2021 at 16:20:39 UTC, Charles Hixson wrote: > core.exception.RangeError at source/freqs.d(32): Range violation > ---------------- > ??:? _d_arrayboundsp [0x56041325a70d] > ??:? _Dmain [0x560413233beb] > DMD64 D Compiler v2.097.2 By the way, if you upgrade to 2.098.0, you get a better error message for out of bounds array access.