try returning after server.close Edit: also this is this bug [https://github.com/nim-lang/Nim/issues/6186](https://github.com/nim-lang/Nim/issues/6186)
Edit2: do you set killServer = true in your code?
try returning after server.close Edit: also this is this bug [https://github.com/nim-lang/Nim/issues/6186](https://github.com/nim-lang/Nim/issues/6186)
Edit2: do you set killServer = true in your code?