Description of problem:
When I open Calibre, and click "Add books", calibre crashes.

strace:
[pid 29823]      0.000043 write(2, "\n(python2:29823): Gdk-\33[1;33mWARNING\33[0m **: gdkwindow-x11.c:5573 drawable is not a native X11 window\n", 102
(python2:29823): Gdk-WARNING **: gdkwindow-x11.c:5573 drawable is not a native X11 window
) = 102
[pid 29823]      0.000026 --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x500000090} ---
[pid 29899]      0.703162 +++ killed by SIGSEGV (core dumped) +++
[pid 29898]      0.000015 +++ killed by SIGSEGV (core dumped) +++
[pid 29897]      0.000011 +++ killed by SIGSEGV (core dumped) +++


Version-Release number of selected component (if applicable):
calibre-2.69.0-1.fc25.x86_64

How reproducible:
Every time

Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info:

Workaround is to start calibre with CALIBRE_NO_NATIVE_FILEDIALOGS=1
(but calibre will still crash when trying to exit the program)