1.11.0 - Super Metroid savestate problems

[Martmists-GH]

For some reason, sometimes creating/loading savestates will crash the game, either with a black screen or corrupting graphics. This, as well as loading these 'crashed' savestates, will completely wipe all savedata. (EDIT: Might be related to resetting while in this crashed state? Savedata loss on power cuts seem to happen frequently)

~~I have attempted to use the diagnostic firmware by extracting and overwriting existing files, but it always seems to just launch to the regular menu. Is it not designed to work with 1.11.0?~~ Diagnostic firmware reports all OK

Possibly related issues:

• #239 (similar save deletion issue)
• #233, #242 (savestates freezing the game)

[Martmists-GH]

On the practice rom, loading a savestate triggers the crash handler for a stack underflow