"Illegal storage access" when creating new Thread inside sharedTable lock

[0xE111]

When creating new thread inside sharedTable lock, the thread falls with SIGSEGV: Illegal storage access. (Attempt to read from nil?).

Example

import sharedtables
import os

var threads: SharedTable[string, Thread[void]]
threads.init()

when isMainModule:
  threads.withKey("Some key") do (key: string, value: var Thread[void], pairExists: var bool):
    echo "Creating thread"
    value.createThread(tp=proc() {.thread.} = echo "Inside thread")
    pairExists = true
    echo "Created thread"

  sleep 1000

Current Output

Creating thread
Created thread
No stack traceback available
SIGSEGV: Illegal storage access. (Attempt to read from nil?)

Expected Output

Creating thread
Created thread
Inside thread

Additional Information

• People say it works on Windows: https://forum.nim-lang.org/t/5590

$ nim -v
Nim Compiler Version 1.1.1 [Linux: amd64]
Compiled at 2019-11-25
git hash: dfe5d115fbc644413fa8747d68c9cf63848e3dee
active boot switches: -d:release -d:nativeStackTrace