Returning thread from proc segfaults on Linux

[konsumlamm]

Example

proc newThread(tp: proc () {.thread.}): Thread[void] =
  createThread(result, tp)

proc test() {.thread.} = echo "test"

let tid = newThread(test)
tid.joinThread

Current Output

No stack traceback available
SIGSEGV: Illegal storage access. (Attempt to read from nil?)
Segmentation fault (core dumped)

Expected Output

test

Additional Information

$ nim -v
Nim Compiler Version 1.5.1 [Linux: amd64]
Compiled at 2021-02-20
Copyright (c) 2006-2021 by Andreas Rumpf

git hash: ac82be07d8ed9795caa0778f0f8577b3934d1d86