StacktraceTop:
CompWindow::id (this=0xa8fe4e0) at /build/buildd/compiz-0.9.5.94+bzr2803/src/window.cpp:4632
getPaintMask (this=<optimized out>) at /build/buildd/unity-4.16.0/plugins/unityshell/src/compizminimizedwindowhandler.h:212
UnityWindow::glPaint (this=0xa938f40, attrib=..., matrix=..., region=..., mask=2) at /build/buildd/unity-4.16.0/plugins/unityshell/src/unityshell.cpp:1447
GLWindow::glPaint (this=0xa924f90, attrib=..., transform=..., region=..., mask=2) at /build/buildd/compiz-0.9.5.94+bzr2803/plugins/opengl/src/paint.cpp:1216
PrivateGLScreen::paintOutputRegion (this=0x9b4d618, transform=..., region=..., output=0x9b0a660, mask=3) at /build/buildd/compiz-0.9.5.94+bzr2803/plugins/opengl/src/paint.cpp:275