Searching on the device: Ignore unicode errors

src/calibre/gui2/library.py

@@ -903,9 +903,14 @@ class OnDeviceSearch(SearchQueryParser):
             locations[i] = q[v]
         for i, r in enumerate(self.model.db):
             for loc in locations:
+                try:
                     if query in loc(r):
                         matches.add(i)
                         break
+                except ValueError: # Unicode errors
+                    import traceback
+                    traceback.print_exc()
+                    pass
         return matches