DOOM (v1.9): Using "-fast" and "Nightmare!" does not mix well!
It really doesn't.
I can't explain the technical side of this bug in particularly accurate terms, but it's clearly an oversight somewhere along the lines of (not) checking whether -fast is already enabled when selecting Nightmare! difficulty.
Why does it crash though?
Because the game engine can't deal with durations of 0.5 tics. Although I guess it doesn't really 'crash' as such, it just gets overloaded with actions to the point where it simply can't process anything other than playing as many sounds as it can manage... so for all that's worth it might as well just fucking explode in my face.
Silly, really.
(No music because DOSbox 0.73 -- I'm lazy, deal with it -- doesn't seem to record anything other than SoundBlaster music. Also, I'm playing Keyboard-only... how so utterly hardcore of me.)
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