add try/except block around subprocess

instance_finder.py

@@ -1,6 +1,6 @@
 import json
 from site_api import get, api, replay
-from sat import COLORS, solve_sat
+from sat import solve_sat
 from database import Game, store, load, commit, conn
 from download_data import export_game
 from variants import num_suits, VARIANTS, variant_name
@@ -144,6 +144,7 @@ def solve_instance(num_players, deck):
 
 
 def solve_seed(seed, num_players, deck_compressed, var_id):
+    try:
         deck = decompress_deck(deck_compressed)
         t0 = perf_counter()
         solvable, solution, num_remaining_cards = solve_instance(num_players, deck)
@@ -169,6 +170,9 @@ def solve_seed(seed, num_players, deck_compressed, var_id):
             raise Exception("Programming Error")
 
         mutex.release()
+    except Exception:
+        traceback.format_exc()
+        print("exception in subprocess:")
 
 
 def solve_unknown_seeds():

requirements.txt

@@ -4,3 +4,4 @@ pysmt
 termcolor
 more_itertools
 psycopg2
+alive_progress