Opened 21 years ago

Closed 21 years ago

#932 closed defect (fixed)

DIG: "Trying to append to a nonexistant stream 0"

Reported by: eriktorbjorn Owned by: fingolfin
Priority: normal Component: Engine: SCUMM
Version: Keywords:
Cc: Game: The Dig


While creating the test case for bug #763709 ("DIG: Recent walk regression") with the latest CVS snapshot, ScummVM crashed twice with a "Trying to append to a nonexistant stream 0" message. The first time it then proceeded with "SDL_BlitSurface failed: SDL_UpperBlit: passed a NULL surface". The second time it started the debugger.

I can't reproduce the bug reliably though. Could it be a race condition?

Ticket imported from: #763714. Ticket imported from: bugs/932.

Change History (4)

comment:1 by fingolfin, 21 years ago

Owner: set to fingolfin

comment:2 by fingolfin, 21 years ago

So, Sound::stopTalkSound was doing this this: if (_talkChannel != -1) _scumm->_mixer->stop(_talkChannel); but left _talkChannel at its old value. Then udner some circumstances, stop() was called again for _talkChannel - only that at this time, the channel was already used by something else -> ka-boom. I fixed this (_talkChannel is now reset to -1) and since then haven't been able to reproduce this problem. Of course that is no prove that the problem is gone but before, I was able to reproduce it in 2 out of 3 tries.

comment:3 by fingolfin, 21 years ago

Resolution: fixed
Status: newclosed

comment:4 by fingolfin, 21 years ago

Still didn't get the error again. Hope it's really fixed. Please reopen this should you be able to reproduce the problem with latest CVS.

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