Bug#530862: audacity: Random hangups

[John Lindgren]

Hello.

I also see random hangups on Squeeze (Audacity 1.3.7-3, wxWidgets
2.8.7.1-1.1, GTK+ 2.16.1-2), with just the same behavior as Jakub
reported -- 100% CPU, interface responds but everything is grayed out. I
managed to get a backtrace of the two audacity processes that were
running during the hang. The backtraces remain the same if I continue
and then interrupt the processes again.

        #0  0x08078240 in GetColorGradient (value=0, selected=true, grayscale=false, 
            red=0xbfc8faf8 "\223", green=0xbfc8fb1d "\223�", blue=0xbfc8fb1e "�")
            at AColor.cpp:530
        #1  0x08151caa in TrackArtist::DrawClipSpectrum (this=0xa34caa8, 
            track=0xa3acb00, clip=0xa3873d8, dc=@0xa30bd00, r=@0xbfc8fbd4, 
            viewInfo=0xa18eaa0, autocorrelation=false, logF=false)
            at TrackArtist.cpp:1913
        #2  0x081526c6 in TrackArtist::DrawSpectrum (this=0xa34caa8, track=0xa3acb00, 
            dc=@0xa30bd00, r=@0xbfc8fbd4, viewInfo=0xa18eaa0, autocorrelation=false, 
            logF=false) at TrackArtist.cpp:1604
        #3  0x08152ae5 in TrackArtist::DrawTracks (this=0xa34caa8, tracks=0xa1cd810, 
            dc=@0xa30bd00, reg=@0xa30bb94, r=@0xbfc8fc4c, clip=@0xbfc8fc6c, 
            viewInfo=0xa18eaa0, drawEnvelope=false, drawSamples=false, 
            drawSliders=false) at TrackArtist.cpp:259
        #4  0x081686c5 in TrackPanel::DrawTracks (this=0xa30bb08, dc=0xa30bd00)
            at TrackPanel.cpp:4718
        #5  0x081687dd in TrackPanel::OnPaint (this=0xa30bb08) at TrackPanel.cpp:1141
        #6  0xb777d7f1 in wxAppConsole::HandleEvent ()
           from /usr/lib/libwx_baseu-2.8.so.0
        #7  0xb781a9ca in wxEvtHandler::ProcessEventIfMatches ()
           from /usr/lib/libwx_baseu-2.8.so.0
        #8  0xb781bbb4 in wxEventHashTable::HandleEvent ()
           from /usr/lib/libwx_baseu-2.8.so.0
        #9  0xb781bcbb in wxEvtHandler::ProcessEvent ()
           from /usr/lib/libwx_baseu-2.8.so.0
        #10 0xb7a13fd0 in wxWindow::GtkSendPaintEvents ()
           from /usr/lib/libwx_gtk2u_core-2.8.so.0
        #11 0xb7a1458d in ?? () from /usr/lib/libwx_gtk2u_core-2.8.so.0
        #12 0xb6d25f56 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
        #13 0x0a2a7d08 in ?? ()
        #14 0xbfc904d0 in ?? ()
        #15 0x0a30bb08 in ?? ()
        #16 0xb6bef680 in ?? () from /usr/lib/libgobject-2.0.so.0
        #17 0x0a30c0f0 in ?? ()
        #18 0x0a30b440 in ?? ()
        #19 0xbfc901b8 in ?? ()
        #20 0xb6bbdb6b in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
        Backtrace stopped: frame did not save the PC
        
        #0  0xb7fbd424 in __kernel_vsyscall ()
        #1  0xb70c8b17 in poll () from /lib/i686/cmov/libc.so.6
        #2  0xb6b901bb in g_poll () from /usr/lib/libglib-2.0.so.0
        #3  0xb7a2d867 in ?? () from /usr/lib/libwx_gtk2u_core-2.8.so.0
        #4  0xb6b82c42 in ?? () from /usr/lib/libglib-2.0.so.0
        #5  0x086e6888 in ?? ()
        #6  0x00000002 in ?? ()
        #7  0x086e6888 in ?? ()
        #8  0x00000002 in ?? ()
        #9  0xb6bfb558 in ?? () from /usr/lib/libglib-2.0.so.0
        #10 0xb6bfb580 in ?? () from /usr/lib/libglib-2.0.so.0
        #11 0xbfcd8af4 in ?? ()
        #12 0xb6bfb558 in ?? () from /usr/lib/libglib-2.0.so.0
        #13 0xb6bfb580 in ?? () from /usr/lib/libglib-2.0.so.0
        #14 0x086e6a6c in ?? ()
        #15 0x00000001 in ?? ()
        #16 0x086e6888 in ?? ()
        #17 0xb7a2d820 in ?? () from /usr/lib/libwx_gtk2u_core-2.8.so.0
        #18 0xb72a6370 in ?? () from /lib/i686/cmov/libpthread.so.0
        #19 0xb72a4890 in ?? () from /lib/i686/cmov/libpthread.so.0
        #20 0x086e6a6c in ?? ()
        #21 0xb6b8049a in g_main_context_default () from /usr/lib/libglib-2.0.so.0
        Backtrace stopped: previous frame inner to this frame (corrupt stack?)
        
John Lindgren