Before you shoot it (if you decide to) or if you’re just curious, test the safety thusly:
With the gun UNLOADED, rack the slide and engage the thumb safety. Now, pull the trigger. If the hammer falls, it needs work. That’s what mine did; only I was demonstrating the function of the safety and the gun fired (downrange), shearing the thumb safety off.
After I had the guts redone, it was an awesome shooter. I wish I still had it!