Odd Segfault when using dynlib

[Nlits]

I get this segfault:
    
    
      Verifying dependencies for libmtg@0.1.0
      Compiling /home/runner/libmtg/tests/test1 (from package libmtg) using c 
backend
    [OK] can import
    {"Island": (name: "Island", text: "({T}: Add {U}.)", imageUrl: 
"https://cards.scryfall.io/normal/front/a/c/acd6be3f-745c-41ad-95c9-1db66ba56be2.jpg?1712356421";,
 expansion: "Outlaws of Thunder Junction", rarity: "common", collectorNumber: 
279, cost: @[], typeLine: (superType: {Basic}, mainType: {Land}, subType: 
{Island}), power: 0, toughness: 0, eventHandleName: "")}
    Lib unloaded
    Traceback (most recent call last)
    
/home/runner/.choosenim/toolchains/nim-2.0.4/lib/pure/collections/tableimpl.nim(198)
 test1
    SIGSEGV: Illegal storage access. (Attempt to read from nil?)
    Segmentation fault (core dumped)
    Error: execution of an external program failed: 
'/home/runner/libmtg/tests/test1'
           Tip: 5 messages have been suppressed, use --verbose to show them.
    tools.nim(36)            doCmd
        
        Error:  Execution failed with exit code 1
            ... Command: /home/runner/libmtg/nimble-env/bin/nim c 
--noNimblePath -d:NimblePkgVersion=0.1.0 --hints:off --colors:off -r --path:. 
/home/runner/libmtg/tests/test1
    
    
    Run

But the traceback makes no sense, as the echo was already successful. 
(`Traceback (most recent call last) 
/home/runner/.choosenim/toolchains/nim-2.0.4/lib/pure/collections/tableimpl.nim(198)
 test1`. Code after the echo statement also runs successfully, and I really 
can’t pinpoint the cause of this segfault.

Code:
    
    
    import std/[dynlib, tables]
    
    test "can cards":
      type CardsProc = proc (): Table[string, CardObject] {.gcsafe, nimcall.}
      
      let lib = loadLib("tests/cardbank.so")
      assert lib != nil, "Error loading library"
      let cards = cast[CardsProc](lib.checkedSymAddr("load"))
      echo cards()
      
      unloadLib(lib)
      echo "Lib unloaded"
      # Segfault
    
    
    Run