pencil version 0.4.4b-0ubuntu4 failed to build on amd64 with GCC-4.6/oneiric

pencil version 0.4.4b-0ubuntu4 failed to build on amd64 with GCC-4.6/oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110413/+buildjob/2464699

Details about the rebuild:
https://lists.ubuntu.com/archives/ubuntu-devel/2011-April/033042.html

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110413/+buildjob/2464699/+files/buildlog_ubuntu-natty-amd64.pencil_0.4.4b-0ubuntu4_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 642 lines into the build log:

src/graphics/bitmap/bitmapimage.cpp:114:6: warning: unused parameter 'image' [-Wunused-parameter]
src/graphics/bitmap/bitmapimage.cpp:114:6: warning: unused parameter 'size' [-Wunused-parameter]
src/graphics/bitmap/bitmapimage.cpp:114:6: warning: unused parameter 'myView' [-Wunused-parameter]
g++ -c -pipe -O2 -D_REENTRANT -Wall -W -DQT_NO_DEBUG -DQT_XML_LIB -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtOpenGL -I/usr/include/qt4/QtXml -I/usr/include/qt4 -I. -Isrc -Isrc/external/flash -Isrc/external/linux -Isrc/external/macosx -Isrc/external/win32 -Isrc/graphics -Isrc/graphics/bitmap -Isrc/graphics/vector -Isrc/interface -Isrc/structure -I. -Iliblinux -I/usr/X11R6/include -I. -o bezierarea.o src/graphics/vector/bezierarea.cpp
g++ -c -pipe -O2 -D_REENTRANT -Wall -W -DQT_NO_DEBUG -DQT_XML_LIB -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtOpenGL -I/usr/include/qt4/QtXml -I/usr/include/qt4 -I. -Isrc -Isrc/external/flash -Isrc/external/linux -Isrc/external/macosx -Isrc/external/win32 -Isrc/graphics -Isrc/graphics/bitmap -Isrc/graphics/vector -Isrc/interface -Isrc/structure -I. -Iliblinux -I/usr/X11R6/include -I. -o beziercurve.o src/graphics/vector/beziercurve.cpp
src/graphics/vector/beziercurve.cpp: In member function 'void BezierCurve::drawPath(QPainter&, Object*, QMatrix, bool, bool, qreal)':
src/graphics/vector/beziercurve.cpp:374:9: warning: unused variable 'squareWidth' [-Wunused-variable]
src/graphics/vector/beziercurve.cpp: In static member function 'static qreal BezierCurve::findDistance(BezierCurve, int, QPointF, QPointF&, qreal&)':
src/graphics/vector/beziercurve.cpp:638:23: warning: variable 'k0' set but not used [-Wunused-but-set-variable]
src/graphics/vector/beziercurve.cpp: In static member function 'static bool BezierCurve::findIntersection(BezierCurve, int, BezierCurve, int, QList<Intersection>&)':
src/graphics/vector/beziercurve.cpp:705:50: error: taking address of temporary [-fpermissive]
make[1]: *** [beziercurve.o] Error 1
make[1]: Leaving directory `/build/buildd/pencil-0.4.4b'
make: *** [build-stamp] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110425-1243
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/pencil-0.4.4b