[Scummvm-devel] FT: assert error

Sebastian Dransfeld sebastid at stud.ntnu.no
Mon Jan 12 00:11:01 CET 2004

I get this error:
scummvm: scumm/imuse_digi/dimuse_sndmgr.cpp:390: int32
Scumm::ImuseDigiSndMgr::getDataFromRegion(Scumm::ImuseDigiSndMgr::soundStruct*, int, byte**, int, int): Assertion `region >= 0 && region < soundHandle->numRegions' failed.

Backtrack of the error:

In scumm/imuse_digi/dimuse.cpp

if (_track[l].curRegion == -1)
int result2 = _sound->getDataFromRegion(_track[l].soundHandle, _track[l].curRegion, &ptr, offset, mixer_size_12);

This will lead to an error in one of the asserts in getDataFromRegion
because switchToNextRegion can return without changing curRegion if the
game is Full Throttle, so curRegion will remain -1. The bug is triggered
if the door to the bar at the beginning is clicked at but no action is

void IMuseDigital::switchToNextRegion(int track) {
	int num_regions = _sound->getNumRegions(_track[track].soundHandle);
	int num_jumps = _sound->getNumJumps(_track[track].soundHandle);
	if ((_vm->_gameId == GID_FT) && (num_jumps != 0)) {
		_track[track].regionOffset = 0;

int32 ImuseDigiSndMgr::getDataFromRegion(soundStruct *soundHandle, int region, byte **buf, int32 offset, int32 size) {
	assert(region >= 0 && region < soundHandle->numRegions);

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