Crash when saving figure with "special" text #4010
Description
(This is possibly a continuation of #2635, but I am not 100% sure.)
I have not yet whittled down the problem to a simple test case, which is why I have called the text "special". If/when I can determine a smaller case, I will update the title, but I thought I'd post it here to get more eyes on the problem.
I'm sorry that the testing procedure is a bit complicated, but I hope I'll provide enough information to determine the problem. To test, you will need matplotlib 1.4.2 and the development version of ObsPy installed for Python 3 (it seem okay on Python 2). Then run the command obspy3-runtests -d obspy.imaging.tests.test_scan.ScanTestCase.test_scan (this runs only one test out of the testing framework).
Here is the shortened backtrace (or see the full backtrace here):
(gdb) bt
... Other C++ exception stuff
#5 0x00007fffe717a0b9 in __cxxabiv1::__cxa_throw (obj=0x9f6b80, tinfo=0x7fffe58671a0 <typeinfo for Py::Exception>, dest=0x0)
at ../../../../libstdc++-v3/libsupc++/eh_throw.cc:87
#6 0x00007fffe5632239 in close_file_callback (stream=<optimized out>) at src/ft2font.cpp:2158
#7 0x00007fffe5349737 in FT_Stream_Free (stream=0x13542a0, external=1) at /usr/src/debug/freetype-2.5.3/src/base/ftobjs.c:228
#8 0x00007fffe534c7a3 in destroy_face (memory=0x1024e90, face=0x13568e0, driver=0x105e160)
at /usr/src/debug/freetype-2.5.3/src/base/ftobjs.c:944
#9 0x00007fffe534c894 in FT_Done_Face (face=0x13568e0) at /usr/src/debug/freetype-2.5.3/src/base/ftobjs.c:2399
#10 0x00007fffe5631f3e in FT2Font::~FT2Font (this=0x1354220, __in_chrg=<optimized out>) at src/ft2font.cpp:984
#11 0x00007fffe56320d9 in FT2Font::~FT2Font (this=0x1354220, __in_chrg=<optimized out>) at src/ft2font.cpp:995
#12 0x00007fffe564b3b3 in Py::PythonClass<FT2Font>::extension_object_deallocator (_self=<FT2Font at remote 0x7fffe43d5750>)
at extern/CXX/Python3/ExtensionType.hxx:300
#13 0x00007ffff79de4b7 in free_keys_object (keys=0x10e2bb0) at /usr/src/debug/Python-3.4.1/Objects/dictobject.c:369
...
PS, the reason I cannot shorten the example yet is that the test here runs another console script by calling its main function with the required arguments. However, if I run the console script directly, it does not crash.