Continuity mistake: In the film's final scenes at the fuel storage facility, full sunlight is streaming through the overhead rafters. Moments later, it's completely dark and the plant's floodlights are all turned on. A few shots further on, the lights are off and it's daylight again.
Continuity mistake: When James Cagney is in the machine shop he empties a bucket of metal shavings into a large barrel. The first time it's full of shavings. When he empties the second bucket the large barrel is now empty again.