InkScape invalid read

** (inkscape:20378): CRITICAL **: SPGradient* chase_hrefs(SPGradient*, bool (*)(const SPGradient*)): assertion 'SP_IS_GRADIENT(src)' failed
==20378== Invalid read of size 8
==20378==    at 0x5569F1: SPGradient::getFirstStop() (sp-gradient.cpp:561)
==20378==    by 0x4C9D3C: sp_get_stop_i(SPGradient*, unsigned int) (gradient-chemistry.cpp:605)
==20378==    by 0x4D3585: GrDrag::selectByStop(SPStop*, bool, bool) (gradient-drag.cpp:1780)
==20378==    by 0x7DE815: gr_stop_combo_changed(_GtkComboBox*, _GtkWidget*) (gradient-toolbar.cpp:636)
==20378==    by 0xB4F65E6: ??? (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.4000.0)
==20378==    by 0xB50F087: g_signal_emit_valist (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.4000.0)
==20378==    by 0xB50FCE1: g_signal_emit (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.4000.0)
==20378==    by 0x7D50C8: resync_active(_EgeSelectOneAction*, int, int) (ege-select-one-action.cpp:905)
==20378==    by 0xB4FDB38: g_object_set_valist (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.4000.0)
==20378==    by 0xB4FE396: g_object_set (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.4000.0)
==20378==    by 0x7D60B4: combo_changed_cb(_GtkComboBox*, void*) (ege-select-one-action.cpp:1017)
==20378==    by 0xB4F65E6: ??? (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.4000.0)
==20378==  Address 0x28 is not stack'd, malloc'd or (recently) free'd
==20378==