==29031==ERROR: AddressSanitizer: heap-use-after-free on address 0x61600028e588 at pc 0x5646aa92ba38 bp 0x7ffe67af5680 sp 0x7ffe67af5670
READ of size 8 at 0x61600028e588 thread T0
    #0 0x5646aa92ba37 in panel_active_animation_changed /home/dfelinto/src/blender/blender/source/blender/editors/interface/interface_panel.c:165
    #1 0x5646aa92c45e in panels_need_realign /home/dfelinto/src/blender/blender/source/blender/editors/interface/interface_panel.c:220
    #2 0x5646aa9379e9 in UI_panels_end /home/dfelinto/src/blender/blender/source/blender/editors/interface/interface_panel.c:1216
    #3 0x5646ab7b2e6f in ED_region_panels_layout_ex /home/dfelinto/src/blender/blender/source/blender/editors/screen/area.c:2439
    #4 0x5646ab4a2ac8 in ED_view3d_buttons_region_layout_ex /home/dfelinto/src/blender/blender/source/blender/editors/space_view3d/space_view3d.c:1300
    #5 0x5646ab4a2b58 in view3d_buttons_region_layout /home/dfelinto/src/blender/blender/source/blender/editors/space_view3d/space_view3d.c:1305
    #6 0x5646ab79bd90 in ED_region_do_layout /home/dfelinto/src/blender/blender/source/blender/editors/screen/area.c:533
    #7 0x5646a9b476e0 in wm_draw_window_offscreen /home/dfelinto/src/blender/blender/source/blender/windowmanager/intern/wm_draw.c:555
    #8 0x5646a9b48a0f in wm_draw_window /home/dfelinto/src/blender/blender/source/blender/windowmanager/intern/wm_draw.c:732
    #9 0x5646a9b4974f in wm_draw_update /home/dfelinto/src/blender/blender/source/blender/windowmanager/intern/wm_draw.c:895
    #10 0x5646a9b3ac64 in WM_main /home/dfelinto/src/blender/blender/source/blender/windowmanager/intern/wm.c:423
    #11 0x5646a8501f62 in main /home/dfelinto/src/blender/blender/source/creator/creator.c:500
    #12 0x7f83634c6b96 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #13 0x5646a8501459 in _start (/home/dfelinto/src/blender/release/master/bin/blender+0x5f25459)

0x61600028e588 is located 520 bytes inside of 576-byte region [0x61600028e380,0x61600028e5c0)
freed by thread T0 here:
    #0 0x7f836835f7b8 in __interceptor_free (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xde7b8)
    #1 0x5646a937ab56 in MEM_lockfree_freeN /home/dfelinto/src/blender/blender/intern/guardedalloc/intern/mallocn_lockfree_impl.c:157
    #2 0x5646a904fd89 in BLI_freelinkN /home/dfelinto/src/blender/blender/source/blender/blenlib/intern/listbase.c:291
    #3 0x5646a9a68e4e in rna_Panel_unregister /home/dfelinto/src/blender/blender/source/blender/makesrna/intern/rna_ui.c:211
    #4 0x5646a93d0771 in pyrna_unregister_class /home/dfelinto/src/blender/blender/source/blender/python/intern/bpy_rna.c:8811
    #5 0x7f83676c1937 in _PyMethodDef_RawFastCallKeywords (/usr/lib/x86_64-linux-gnu/libpython3.7m.so.1.0+0x244937)

previously allocated by thread T0 here:
    #0 0x7f836835fd38 in __interceptor_calloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xded38)
    #1 0x5646a937b197 in MEM_lockfree_callocN /home/dfelinto/src/blender/blender/intern/guardedalloc/intern/mallocn_lockfree_impl.c:267
    #2 0x5646a9a69979 in rna_Panel_register /home/dfelinto/src/blender/blender/source/blender/makesrna/intern/rna_ui.c:324
    #3 0x5646a93cf70a in pyrna_register_class /home/dfelinto/src/blender/blender/source/blender/python/intern/bpy_rna.c:8611
    #4 0x7f83676c1937 in _PyMethodDef_RawFastCallKeywords (/usr/lib/x86_64-linux-gnu/libpython3.7m.so.1.0+0x244937)

SUMMARY: AddressSanitizer: heap-use-after-free /home/dfelinto/src/blender/blender/source/blender/editors/interface/interface_panel.c:165 in panel_active_animation_changed