[Scummvm-tracker] [ScummVM :: Bugs] #13924: SCUMM: FT: Ben sometimes gets stuck in an endless loop in old mine road

[ScummVM :: Bugs]

#13924: SCUMM: FT: Ben sometimes gets stuck in an endless loop in old mine road
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Reporter:  dwatteau       |      Owner:  (none)
    Type:  defect         |     Status:  new
Priority:  normal         |  Component:  Engine: SCUMM
 Version:                 |   Keywords:  loop,old mine road,goggles
    Game:  Full Throttle  |
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 ScummVM HEAD, either on macOS, Linux, Windows or PS3. Playing with the
 DOS/French version (I don't think the problem could be related to the
 language, though).

 1. Start the game with boot param 551
 2. Left-click when you see the sign for the old mine road, in order to go
 there
 3. If you can see another biker on the screen, press Esc. (Otherwise, the
 following action won't be available.)
 4. When you're approaching any road sign for Highway 9, right-click so
 that Ben puts on the goggles. There's something timing-related to trigger
 there: the idea is to right-click a few seconds before the road sign, so
 that Ben puts on the goggles exactly when the road sign icon
 appears/disappears from the bottom left corner of the screen.
 5. You may need to repeat the previous action dozens of time before
 triggering the bug. At some point, Ben will be stuck in an endless loop
 where he immediately puts on and puts off the goggles.

 See this video as an example:
 https://www.youtube.com/watch?v=cEhTfrHsEdg

 I can't provide a savegame where this is happening, since the game
 disables any save action during the INSANE sequences.

 There are other ways to trigger this issue, but that one appears to be the
 "easiest" one to trigger. Other ways include:

 * putting the goggles on when Ben is very close to the edge of the road,
 and is about to fall off his bike.
 * endlessly drive around the road signs in the old mine road, without
 touching the keyboard or mouse. At some point, Ben will endlessly
 enter/leave the old mine road, although you haven't triggered any action.

 I can reproduce this with ScummVM 2.0.0, and a late November 2017 build,
 so it doesn't look like a recent regression. I'm not able to reproduce
 this with an earlier build yet, but since it can take minutes and dozens
 of random tries to trigger this bug, that doesn't really mean a lot. Tried
 using Git bisect twice around the 1.9.0/2.0.0 area, but it lead me
 nowhere.

 I couldn't reproduce this issue with the original game (DREAMM, Aaron
 Giles 2002 interpreter, 2017 remaster) either, at the moment.
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Ticket URL: <https://bugs.scummvm.org/ticket/13924>
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