flowregion trips GetDest assertion

Inkscape crashes due to a failed assertion caused by a SVG FlowRegion. I do not know what a FlowRegion is or if this instance is valid or not. I attached the example file.

Inkscape Version: 0.92.3 (unknown) / 0.92.3+68~ubuntu16.04.1 (from http://ppa.launchpad.net/inkscape.dev)
Operating System: Ubuntu 16.04.4 x86_64

Inkscape output:
ERROR:/build/inkscape-vgG8ts/inkscape-0.92.3+68~ubuntu16.04.1/src/sp-flowregion.cpp:360:void GetDest(SPObject*, Shape**): assertion failed: (item != NULL)

Backtrace:
#0 0x00007ffff4281428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
#1 0x00007ffff428302a in __GI_abort () at abort.c:89
#2 0x00007ffff6679d65 in g_assertion_message () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007ffff6679dfa in g_assertion_message_expr () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4 0x00007ffff75a45fb in ?? () from /usr/bin/../lib/inkscape/libinkscape_base.so
#5 0x00007ffff75a48a3 in SPFlowregion::UpdateComputed() () from /usr/bin/../lib/inkscape/libinkscape_base.so
#6 0x00007ffff75a50cd in SPFlowregion::write(Inkscape::XML::Document*, Inkscape::XML::Node*, unsigned int) ()
   from /usr/bin/../lib/inkscape/libinkscape_base.so
#7 0x00007ffff75a99ab in SPFlowtext::write(Inkscape::XML::Document*, Inkscape::XML::Node*, unsigned int) ()
   from /usr/bin/../lib/inkscape/libinkscape_base.so
#8 0x00007ffff74dde04 in fix_update(SPObject*) () from /usr/bin/../lib/inkscape/libinkscape_base.so
#9 0x00007ffff74decd3 in sp_file_text_run_recursive(void (*)(SPObject*), SPObject*) () from /usr/bin/../lib/inkscape/libinkscape_base.so
#10 0x00007ffff74ded3b in sp_file_text_run_recursive(void (*)(SPObject*), SPObject*) () from /usr/bin/../lib/inkscape/libinkscape_base.so
#11 0x00007ffff74ded3b in sp_file_text_run_recursive(void (*)(SPObject*), SPObject*) () from /usr/bin/../lib/inkscape/libinkscape_base.so
#12 0x00007ffff74ded3b in sp_file_text_run_recursive(void (*)(SPObject*), SPObject*) () from /usr/bin/../lib/inkscape/libinkscape_base.so
#13 0x00007ffff74ded3b in sp_file_text_run_recursive(void (*)(SPObject*), SPObject*) () from /usr/bin/../lib/inkscape/libinkscape_base.so
#14 0x00007ffff74dedd5 in sp_file_convert_text_baseline_spacing(SPDocument*) () from /usr/bin/../lib/inkscape/libinkscape_base.so
#15 0x00007ffff74cc5cd in SPDocument::createDoc(Inkscape::XML::Document*, char const*, char const*, char const*, unsigned int, SPDocument*) ()
   from /usr/bin/../lib/inkscape/libinkscape_base.so
#16 0x00007ffff74cd042 in SPDocument::createNewDoc(char const*, unsigned int, bool, SPDocument*) () from /usr/bin/../lib/inkscape/libinkscape_base.so
#17 0x00007ffff6f649a8 in Inkscape::Extension::Input::open(char const*) () from /usr/bin/../lib/inkscape/libinkscape_base.so
#18 0x00007ffff6f676ec in Inkscape::Extension::open(Inkscape::Extension::Extension*, char const*) () from /usr/bin/../lib/inkscape/libinkscape_base.so
#19 0x00007ffff74d9648 in sp_file_open(Glib::ustring const&, Inkscape::Extension::Extension*, bool, bool) ()
   from /usr/bin/../lib/inkscape/libinkscape_base.so
#20 0x000055555555c3ef in sp_main_gui(int, char const**) ()
#21 0x00007ffff426c830 in __libc_start_main (main=0x55555555a1d0 <main>, argc=2, argv=0x7fffffffdf08, init=<optimized out>, fini=<optimized out>,
    rtld_fini=<optimized out>, stack_end=0x7fffffffdef8) at ../csu/libc-start.c:291
#22 0x000055555555a709 in _start ()