python debugger hangs #3342
Description
Environment data
- VS Code version: 1.29.0
- Extension version (available under the Extensions sidebar): 2018.10.1 (09 Nov 2018)
- OS and version: Ubuntu 16.04 x64 latest updates
- Python version (& distribution if applicable, e.g. Anaconda): Anaconda 4.5.11, python 3.6.6
- Type of virtual environment used (N/A | venv | virtualenv | conda | ...): conda
- Relevant/affected Python packages and their versions: python-chess 0.23.9
Actual behavior
integrated debugger hangs when single-stepping over chess-engine commands from python-chess which communicate with the stockfish chess engine.
Note: continuing over the code, to a breakpoint later in the code, works as expected
Expected behavior
debugger should single step over the commands successfully.
debugging with pdb from the command line (python -m pdb fname.py) works as expected
Steps to reproduce:
- pip install python-chess
- sudo apt install stockfish
- try debugging the following code, single stepping over the 'SF.*' commands
import chess.uci
from chess import Board
SF = chess.uci.popen_engine('/usr/games/stockfish')
sample_fen = 'rnb1k2r/pp2pp2/3p3p/2pP2p1/2P1B3/2q3B1/P4PPP/R2Q1KNR b kq - 0 12'
SF.uci()
SF.isready()
board = Board()
board.set_fen(sample_fen)
SF.ucinewgame()
SF.position(board)
res = SF.go(nodes=50_000)
print(res)