When researching Mining Productivity 3, canceling this research caused a crash.
Situation/Testing for repeatability:
- Was playing multiplayer and was hosting the game on my PC. Canceled Mining Productivity 3, game crashed.
- Reloaded Factorio, rehosted game from autosave_1, tried to cancel research, crash.
- Reloaded Factorio, loaded autosave_1 game in single player, tried to cancel research, crash.
- (become overly excited that I finally found a bug to report!)
- Reloaded previous autosave_2 from 10 minutes earlier, was actively researching Mining productivity 2, canceled research, no crash.
- Resumed playing autosave_2, finished researching Mining productivity 2, started mining productivity 3, waited to same researched point (~25%) and canceled research, no crash.