proc `$`*(key: PublicKey): string =
    result = ""
    for i in 0 ..< 64:
        echo i
        result = result & key.data[i].toHex()

I have that Nim code to iterate through an array and get the Hex representation of the data inside a PublicKey object. Everytime my program runs, which generates 100 keys for use in a for loop, runs, the 5th time I use it, when i is 11, I get a segfault. The traceback is:

PublicKey.nim(20) $
gc.nim(475) newObj
alloc.nim(759) rawAlloc

I do manually allocate the memory for the PublicKey object using alloc0, but I do check if it's nil, and it's not. I only dealloc it in one place, at the end of the for loop, after I'm done with all of it. No other place uses realloc or dealloc. Any ideas?