[Scummvm-tracker] [ScummVM] #9702: SCI: SQ6: Game crashes when loading an invalid save game from launcher

[Colin Snover]

#9702: SCI: SQ6: Game crashes when loading an invalid save game from launcher
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Reporter:  csnover  |      Owner:  (none)
    Type:  defect   |     Status:  new
Priority:  low      |  Component:  Engine: SCI
Keywords:  sci32    |       Game:  Space Quest 6
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 Reproduction:

 1. Download the attached save game and put it into ScummVM Savegames
 2. Run ScummVM and choose Space Quest 6 in the launcher
 3. Click “Load...” in the launcher
 4. Choose the attached save game
 5. Click “Load”

 Expected: Game shows a dialogue saying the game is invalid, then starts
 from the beginning

 Actual: Game shows a dialogue saying the game is invalid, then crashes
 attempting to call `SQ6::setCursor`

 Game version: 1.0

 Backtrace:

 {{{
 lookupSelector: Attempt to send to non-object or invalid script. Address
 0000:0000, method SQ6::setCursor (room 100, script 64994, localCall
 ffffffff)!
 Call stack (current base: 0x6):
  0: script 64994 - SQ6::play()
      obj at 0001:29fb pc=0005:037b sp=ST:0000 fp=ST:0000 argp:ST:0001
  1: script 64994 - SQ6::doit()
      by 0 obj at 0001:29fb pc=0005:0759 sp=ST:0005 fp=ST:0002 argp:ST:0001
  2: script 0 - SQ6::newRoom(0000:0064)
      by 1 obj at 0001:29fb pc=0001:0562 sp=ST:0008 fp=ST:0008 argp:ST:0006
  3: script 64994 - Game::newRoom(0000:0064)
      by 2 obj at 0001:29fb pc=0005:0858 sp=ST:0014 fp=ST:000b argp:ST:0009
  4: script 64999 - Event::new(0000:0003)
      by 3 obj at 0004:094d pc=0004:0821 sp=ST:0018 fp=ST:0017 argp:ST:0015
  5:[4]  kGetEvent(0000:0003, 000f:0007)
      by 4 obj at 0000:0000 pc:none argp:ST:0018
  6: script 0 - SQ6::restore()
      by 5 obj at 0001:29fb pc=0001:09a0 sp=ST:001f fp=ST:001d argp:ST:001c
  7: script 64994 - Game::restore()
      by 6 obj at 0001:29fb pc=0005:0efa sp=ST:002d fp=ST:0021 argp:ST:0020
  8: script 64994 - SQ6::setCursor(0000:0000, 0000:ffff)
      by 7 obj at 0001:29fb pc=0005:0f26 sp=ST:0034 fp=ST:0031 argp:ST:002e
 }}}

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Ticket URL: <https://bugs.scummvm.org/ticket/9702>
ScummVM <https://bugs.scummvm.org>
ScummVM