[Rosegarden-devel] CVS b0rk3d... infinite loop?

[Silvan <dmm...@us...>]

Tried to run RG to see if my new stuff is working, and it core dumped=20
immediately.  Whee.  That'll teach me to update my tree in the middle of=20
testing something.  Need to read up on that revert stuff...  But anyway..=
=2E

I've already tried a complete rebuild twice.  It's fucked.  It builds, bu=
t=20
there's a tiny runtime problem.

Tail of RG output, twelve seconds after starting,  is:

QPixmap::convertFromImage: Cannot convert a null image
rosegarden: TrackEditor::setupSegments() begin
rosegarden: SegmentCanvas::slotSetTool(3)[SegmentCanvas pointer (0x897e35=
0) to=20
unnamed widget, geometry=3D100x30+0+0]
rosegarden: SegmentMover()
rosegarden: SegmentCanvas::slotSetTool(1)[SegmentCanvas pointer (0x897e35=
0) to=20
unnamed widget, geometry=3D100x30+0+0]
rosegarden: SegmentPencil()
Segmentation fault (core dumped)

Looking through this stack trace, I think something must be stuck in an=20
infinite loop and it's eventually running something out of resources=20
somewhere and crapping out.  Not a very technical explanation, but this d=
amn=20
thing goes on for ages.  I finally got tired of watching it when it got t=
o=20
#17000.  I wanted to see how far it would go, but I turned out not to be =
that=20
curious.

Looks to me like some kind of feedback loop where an object is creating n=
ew=20
instances of itself or something...  (?)  I haven't actually tried to fin=
d=20
it.  I need to go to bed.

It happened today, recently.  Might be Guillaume's fix of Rich's redundan=
t=20
stuff, but that's only speculation.

(gdb) where
#0  0x4082939c in QMetaObject::slotOffset () from /usr/lib/libqt-mt.so.3
#1  0x40832b26 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#2  0x40832c34 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#3  0x08264be0 in TrackButtons::trackSelected (this=3D0x8986438, t0=3D0) =
at=20
trackbuttons.moc.cpp:152
#4  0x08235ddd in TrackButtons::slotLabelSelected (this=3D0x8986438, posi=
tion=3D0)
    at trackbuttons.cpp:487
#5  0x081fb211 in RosegardenGUIView::slotSelectTrackSegments (this=3D0x89=
1d490,=20
trackId=3D0)
    at rosegardenguiview.cpp:623
#6  0x08255f25 in RosegardenGUIView::qt_invoke (this=3D0x891d490, _id=3D4=
8,=20
_o=3D0xbfe01264)
    at rosegardenguiview.moc.cpp:258
#7  0x40832b26 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#8  0x40832c34 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#9  0x08264be0 in TrackButtons::trackSelected (this=3D0x8986438, t0=3D0) =
at=20
trackbuttons.moc.cpp:152
#10 0x08235ddd in TrackButtons::slotLabelSelected (this=3D0x8986438, posi=
tion=3D0)
    at trackbuttons.cpp:487
#11 0x081fb211 in RosegardenGUIView::slotSelectTrackSegments (this=3D0x89=
1d490,=20
trackId=3D0)
    at rosegardenguiview.cpp:623
#12 0x08255f25 in RosegardenGUIView::qt_invoke (this=3D0x891d490, _id=3D4=
8,=20
_o=3D0xbfe01414)
    at rosegardenguiview.moc.cpp:258
#13 0x40832b26 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#14 0x40832c34 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#15 0x08264be0 in TrackButtons::trackSelected (this=3D0x8986438, t0=3D0) =
at=20
trackbuttons.moc.cpp:152
[truncated]

--=20
Michael McIntyre         USDA zone 6b in SW VA, USA
Silvan <dmm...@us...> Linux Druid
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