Thread 1 received signal SIGSEGV, Segmentation fault.
rawAlloc_yn9c8RLaS8vgVBeMBfmkdUg (
    a=a@entry=0x4532c0 <mainThread_6r3APOnKvB9aL9atazGvT52A+160>,
    requestedSize=requestedSize@entry=57) at C:/Nim/lib/system/alloc.nim:776
776             c.freeList = c.freeList.next