fix: catch corrupted cache file

Author: itkovian

lib/vsc/utils/cache.py

@@ -28,9 +28,10 @@
 
 @author: Andy Georges (Ghent University)
 """
+import diskcache as dc
 import logging
+import shutil
 import time
-import diskcache as dc
 
 
 class FileCache(object):
@@ -69,7 +70,12 @@ def __init__(self, filename, retain_old=True, raise_unpickable=False):
         self.retain_old = retain_old  # this is no longer used
 
         self.filename = filename
-        self.cache = dc.Cache(filename)
+        try:
+            self.cache = dc.Cache(filename)
+        except:
+            shutil.rmtree(filename)
+            self.cache = dc.Cache(filename)
+
         if not retain_old:
             self.cache.clear()