The F-80, for example, if you flew it too fast (and the engine was powerful enough to do that in level flight) the airplane would suddenly "pitch up", fold the wings back, and crash.
There are endless examples of these kinds of "bugs" in leading edge fighter design that have nothing to do with software.
I was reading to "One Minute to Midnight" about the Cuban msisile crisis and the account of flying a U-2 was pretty scary - at high altitude they had a very narrow range of speeds at which they could fly, fly too fast and the wings come off, fly to slowly and the plane stalls.
The P-51 had an interesting problem shared with other high torque single engine fighters of its day. If you're coming in for a landing, with the engine idling, decided to abort and firewalled the throttle, the airplane would rotate about the crankshaft.
The F-80, for example, if you flew it too fast (and the engine was powerful enough to do that in level flight) the airplane would suddenly "pitch up", fold the wings back, and crash.
There are endless examples of these kinds of "bugs" in leading edge fighter design that have nothing to do with software.