Same problem, Calibre does not start.
This happened after I updated to latest version (4.10.1) and at the same time updated my Mageia linux to the latest (new kernel, new other libs, possibly Qt libs, did not pay much attn at the time).
Any ideas?
Code:
malloc(): invalid size (unsorted)
Thread 1 "FontScanner" received signal SIGABRT, Aborted.
0x00007ffff7c25a7a in raise () from /lib64/libc.so.6
(gdb) bt
#0 0x00007ffff7c25a7a in raise () from /lib64/libc.so.6
#1 0x00007ffff7c0e524 in abort () from /lib64/libc.so.6
#2 0x00007ffff7c67ff8 in __libc_message () from /lib64/libc.so.6
#3 0x00007ffff7c6e89a in malloc_printerr () from /lib64/libc.so.6
#4 0x00007ffff7c714dc in _int_malloc () from /lib64/libc.so.6
#5 0x00007ffff7c72cd6 in malloc () from /lib64/libc.so.6
#6 0x00007fffed6a27f4 in glXGetFBConfigs () from /lib64/libGL.so.1
#7 0x00007fffed6a3dbf in glXChooseFBConfigSGIX () from /lib64/libGL.so.1
#8 0x00007fffe2558d6c in qglx_findConfig(_XDisplay*, int, QSurfaceFormat, bool, int, int) ()
from /usr/lib64/qt5/plugins/xcbglintegrations/libqxcb-glx-integration.so
#9 0x00007fffe2559495 in qglx_findVisualInfo(_XDisplay*, int, QSurfaceFormat*, int, int) ()
from /usr/lib64/qt5/plugins/xcbglintegrations/libqxcb-glx-integration.so
#10 0x00007fffe255498e in QXcbGlxWindow::createVisual() ()
from /usr/lib64/qt5/plugins/xcbglintegrations/libqxcb-glx-integration.so
#11 0x00007fffe99b7084 in QXcbWindow::create() ()
from /opt/calibre/lib/libQt5XcbQpa.so.5
#12 0x00007fffe99a314a in QXcbIntegration::createPlatformWindow(QWindow*) const
() from /opt/calibre/lib/libQt5XcbQpa.so.5
#13 0x00007fffed85c4fe in QWindowPrivate::create(bool, unsigned long long) ()
from /opt/calibre/lib/libQt5Gui.so.5
#14 0x00007fffebe9d811 in QWidgetPrivate::create() ()
--Type <RET> for more, q to quit, c to continue without paging--
from /opt/calibre/lib/libQt5Widgets.so.5
#15 0x00007fffebe9dea0 in QWidget::create(unsigned long long, bool, bool) ()
from /opt/calibre/lib/libQt5Widgets.so.5
#16 0x00007fffebea96a4 in QWidgetPrivate::setVisible(bool) ()
from /opt/calibre/lib/libQt5Widgets.so.5
#17 0x00007fffec54d6b4 in ?? ()
from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#18 0x00007fffec6a0398 in ?? ()
from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#19 0x00007ffff78daa35 in PyEval_EvalFrameEx ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#20 0x00007ffff78dcfbc in PyEval_EvalCodeEx ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#21 0x00007ffff78d9404 in PyEval_EvalFrameEx ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#22 0x00007ffff78dcfbc in PyEval_EvalCodeEx ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#23 0x00007ffff7851c6c in ?? ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#24 0x00007ffff781f2b3 in PyObject_Call ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#25 0x00007ffff783108c in ?? ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
--Type <RET> for more, q to quit, c to continue without paging--
#26 0x00007ffff781f2b3 in PyObject_Call ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#27 0x00007ffff78d3087 in PyEval_CallObjectWithKeywords ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#28 0x00007fffeed7b1e5 in ?? ()
from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtCore.so
#29 0x00007fffeed7b738 in ?? ()
from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtCore.so
#30 0x00007fffeed7b9f0 in ?? ()
from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtCore.so
#31 0x00007fffeed7c527 in ?? ()
from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtCore.so
#32 0x00007fffee868ae7 in ?? () from /opt/calibre/lib/libQt5Core.so.5
#33 0x00007fffee86c473 in ?? () from /opt/calibre/lib/libQt5Core.so.5
#34 0x00007fffee861323 in QObject::event(QEvent*) ()
from /opt/calibre/lib/libQt5Core.so.5
#35 0x00007fffebe688fc in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /opt/calibre/lib/libQt5Widgets.so.5
#36 0x00007fffebe6fdd0 in QApplication::notify(QObject*, QEvent*) ()
from /opt/calibre/lib/libQt5Widgets.so.5
#37 0x00007fffec71c68e in ?? ()
from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#38 0x00007fffee82fca8 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
--Type <RET> for more, q to quit, c to continue without paging--
() from /opt/calibre/lib/libQt5Core.so.5
#39 0x00007fffee88b1e9 in QTimerInfoList::activateTimers() ()
from /opt/calibre/lib/libQt5Core.so.5
#40 0x00007fffee88ba71 in ?? () from /opt/calibre/lib/libQt5Core.so.5
#41 0x00007fffef5d7db7 in g_main_context_dispatch ()
from /opt/calibre/lib/libglib-2.0.so.0
#42 0x00007fffef5d80c8 in ?? () from /opt/calibre/lib/libglib-2.0.so.0
#43 0x00007fffef5d82ac in g_main_context_iteration ()
from /opt/calibre/lib/libglib-2.0.so.0
#44 0x00007fffee88be3c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/calibre/lib/libQt5Core.so.5
#45 0x00007fffee82e532 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/calibre/lib/libQt5Core.so.5
#46 0x00007fffee837c34 in QCoreApplication::exec() ()
from /opt/calibre/lib/libQt5Core.so.5
#47 0x00007fffec6912cb in ?? ()
from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#48 0x00007ffff78daa35 in PyEval_EvalFrameEx ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#49 0x00007ffff78dcfbc in PyEval_EvalCodeEx ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#50 0x00007ffff78d9404 in PyEval_EvalFrameEx ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
--Type <RET> for more, q to quit, c to continue without paging--
#51 0x00007ffff78dcfbc in PyEval_EvalCodeEx ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#52 0x00007ffff78d9404 in PyEval_EvalFrameEx ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#53 0x00007ffff78dcfbc in PyEval_EvalCodeEx ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#54 0x00007ffff78d9404 in PyEval_EvalFrameEx ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#55 0x00007ffff78dcfbc in PyEval_EvalCodeEx ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#56 0x00007ffff7851c6c in ?? ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#57 0x00007ffff781f2b3 in PyObject_Call ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#58 0x00007ffff78d3087 in PyEval_CallObjectWithKeywords ()
from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#59 0x00007ffff7dc8529 in execute_python_entrypoint ()
from /opt/calibre/lib/libcalibre-launcher.so
#60 0x0000000000400636 in ?? ()
#61 0x00007ffff7c0fb0b in __libc_start_main () from /lib64/libc.so.6
#62 0x0000000000400669 in ?? ()
(gdb)