Studio animators have been facing crashes with overrides of complex characters, when saving .blend file, after an override resync.
Here is a backtrace from @Pablo Fournier (pablico) :
Thread 21 "blender" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffc163a700 (LWP 232709)]
pose_channel_in_IK_chain (ob=0x7fffab331408, pchan=0x7fffb64f9808, level=0)
at /media/data/blender_guest/blender_master/source/blender/blenkernel/intern/action.c:912
912 for (bone = pchan->bone->childbase.first; bone; bone = bone->next) {
#0 pose_channel_in_IK_chain (ob=0x7fffab331408, pchan=0x7fffb64f9808, level=0)
at /media/data/blender_guest/blender_master/source/blender/blenkernel/intern/action.c:912
#1 0x000000000379aff2 in BKE_pose_channel_in_IK_chain
(ob=0x7fffab331408, pchan=0x7fffb64f9808)
at /media/data/blender_guest/blender_master/source/blender/blenkernel/intern/action.c:923
#2 0x00000000040acdc6 in rna_PoseChannel_has_ik_get (ptr=0x7fffc15df170)
at /media/data/blender_guest/blender_master/source/blender/makesrna/intern/rna_pose.c:327
#3 0x00000000040b088f in PoseBone_is_in_ik_chain_get (ptr=0x7fffc15df170)
at /media/data/blender_guest/cmake_debug/source/blender/makesrna/intern/rna_pose_gen.c:1059
--Type <RET> for more, q to quit, c to continue without paging--c
#4 0x0000000003f40f1d in RNA_property_boolean_get (ptr=0x7fffc15df170, prop=0x132f9b40 <rna_PoseBone_is_in_ik_chain>) at /media/data/blender_guest/blender_master/source/blender/makesrna/intern/rna_access.c:2340
#5 0x00000000040bea8d in rna_property_override_diff_default (bmain=0x7fffb9b8ad08, prop_a=0x7fffc15df170, prop_b=0x7fffc15df1b0, mode=0, override=0x7fffab344568, rna_path=0x7fffc15df2b0 "pose.bones[\"ORG-HeelPivot.R\"].is_in_ik_chain", rna_path_len=44, flags=131072, r_override_changed=0x7fffc15df08d) at /media/data/blender_guest/blender_master/source/blender/makesrna/intern/rna_rna.c:1534
#6 0x0000000003f523ec in rna_property_override_diff (bmain=0x7fffb9b8ad08, prop_a=0x7fffc15df170, prop_b=0x7fffc15df1b0, rna_path=0x7fffc15df2b0 "pose.bones[\"ORG-HeelPivot.R\"].is_in_ik_chain", rna_path_len=44, mode=RNA_EQ_STRICT, override=0x7fffab344568, flags=(RNA_OVERRIDE_COMPARE_CREATE | RNA_OVERRIDE_COMPARE_RESTORE), r_report_flags=0x7fffc15df128) at /media/data/blender_guest/blender_master/source/blender/makesrna/intern/rna_access_compare_override.c:344
#7 0x0000000003f53037 in RNA_struct_override_matches (bmain=0x7fffb9b8ad08, ptr_local=0x7fffc15e5598, ptr_reference=0x7fffc15e5628, root_path=0x7fffc15e1380 "pose.bones[\"ORG-HeelPivot.R\"]", root_path_len=29, override=0x7fffab344568, flags=(RNA_OVERRIDE_COMPARE_CREATE | RNA_OVERRIDE_COMPARE_RESTORE), r_report_flags=0x7fffc15e133c) at /media/data/blender_guest/blender_master/source/blender/makesrna/intern/rna_access_compare_override.c:704
#8 0x00000000040be5d5 in rna_property_override_diff_propptr (bmain=0x7fffb9b8ad08, propptr_a=0x7fffc15e5598, propptr_b=0x7fffc15e5628, mode=RNA_EQ_STRICT, no_ownership=false, no_prop_name=false, override=0x7fffab344568, rna_path=0x7fffc15e8a00 "pose.bones", rna_path_len=10, property_type=6, rna_itemname_a=0x7fffc15e5750 "ORG-HeelPivot.R", rna_itemname_b=0x7fffc15e7750 "ORG-HeelPivot.R", rna_itemindex_a=10, rna_itemindex_b=10, flags=196608, r_override_changed=0x7fffc15e87dd) at /media/data/blender_guest/blender_master/source/blender/makesrna/intern/rna_rna.c:1419
#9 0x00000000040bf95f in rna_property_override_diff_default (bmain=0x7fffb9b8ad08, prop_a=0x7fffc15e88c0, prop_b=0x7fffc15e8900, mode=0, override=0x7fffab344568, rna_path=0x7fffc15e8a00 "pose.bones", rna_path_len=10, flags=196608, r_override_changed=0x7fffc15e87dd) at /media/data/blender_guest/blender_master/source/blender/makesrna/intern/rna_rna.c:1897
#10 0x0000000003f523ec in rna_property_override_diff (bmain=0x7fffb9b8ad08, prop_a=0x7fffc15e88c0, prop_b=0x7fffc15e8900, rna_path=0x7fffc15e8a00 "pose.bones", rna_path_len=10, mode=RNA_EQ_STRICT, override=0x7fffab344568, flags=(RNA_OVERRIDE_COMPARE_CREATE | RNA_OVERRIDE_COMPARE_RESTORE), r_report_flags=0x7fffc15e8878) at /media/data/blender_guest/blender_master/source/blender/makesrna/intern/rna_access_compare_override.c:344
#11 0x0000000003f53037 in RNA_struct_override_matches (bmain=0x7fffb9b8ad08, ptr_local=0x7fffc15eec80, ptr_reference=0x7fffc15eed10, root_path=0x7fffc0a476f8 "pose", root_path_len=4, override=0x7fffab344568, flags=(RNA_OVERRIDE_COMPARE_CREATE | RNA_OVERRIDE_COMPARE_RESTORE), r_report_flags=0x7fffc15eaa8c) at /media/data/blender_guest/blender_master/source/blender/makesrna/intern/rna_access_compare_override.c:704
#12 0x00000000040be5d5 in rna_property_override_diff_propptr (bmain=0x7fffb9b8ad08, propptr_a=0x7fffc15eec80, propptr_b=0x7fffc15eed10, mode=RNA_EQ_STRICT, no_ownership=false, no_prop_name=false, override=0x7fffab344568, rna_path=0x7fffc0a476f8 "pose", rna_path_len=4, property_type=5, rna_itemname_a=0x0, rna_itemname_b=0x0, rna_itemindex_a=-1, rna_itemindex_b=-1, flags=196608, r_override_changed=0x7fffc15f1f2d) at /media/data/blender_guest/blender_master/source/blender/makesrna/intern/rna_rna.c:1419
#13 0x00000000040bf4ff in rna_property_override_diff_default (bmain=0x7fffb9b8ad08, prop_a=0x7fffc15f2010, prop_b=0x7fffc15f2050, mode=0, override=0x7fffab344568, rna_path=0x7fffc0a476f8 "pose", rna_path_len=4, flags=196608, r_override_changed=0x7fffc15f1f2d) at /media/data/blender_guest/blender_master/source/blender/makesrna/intern/rna_rna.c:1743
#14 0x0000000003f523ec in rna_property_override_diff (bmain=0x7fffb9b8ad08, prop_a=0x7fffc15f2010, prop_b=0x7fffc15f2050, rna_path=0x7fffc0a476f8 "pose", rna_path_len=4, mode=RNA_EQ_STRICT, override=0x7fffab344568, flags=(RNA_OVERRIDE_COMPARE_CREATE | RNA_OVERRIDE_COMPARE_RESTORE), r_report_flags=0x7fffc15f1fc8) at /media/data/blender_guest/blender_master/source/blender/makesrna/intern/rna_access_compare_override.c:344
#15 0x0000000003f53037 in RNA_struct_override_matches (bmain=0x7fffb9b8ad08, ptr_local=0x7fffc15f41a0, ptr_reference=0x7fffc15f41c0, root_path=0x0, root_path_len=0, override=0x7fffab344568, flags=(RNA_OVERRIDE_COMPARE_CREATE | RNA_OVERRIDE_COMPARE_RESTORE), r_report_flags=0x7fffc15f4194) at /media/data/blender_guest/blender_master/source/blender/makesrna/intern/rna_access_compare_override.c:704
#16 0x000000000332f67c in BKE_lib_override_library_operations_create (bmain=0x7fffb9b8ad08, local=0x7fffab331408) at /media/data/blender_guest/blender_master/source/blender/blenkernel/intern/lib_override.c:1371
#17 0x000000000332f74d in lib_override_library_operations_create_cb (pool=0x7fffaee48708, taskdata=0x7fffab331408) at /media/data/blender_guest/blender_master/source/blender/blenkernel/intern/lib_override.c:1402
#18 0x000000000df8f238 in Task::operator()() const::{lambda()#1}::operator()() const (__closure=0x7fffc15f4310) at /media/data/blender_guest/blender_master/source/blender/blenlib/intern/task_pool.cc:118
#19 0x000000000df8f6b8 in tbb::interface7::internal::delegated_function<Task::operator()() const::{lambda()#1} const, void>::operator()() const (this=0x7fffc15f42a0) at /media/data/blender_guest/lib/linux_centos7_x86_64/tbb/include/tbb/task_arena.h:93
#20 0x0000000003876c85 in tbb::interface7::internal::isolate_within_arena(tbb::interface7::internal::delegate_base&, long) ()
#21 0x000000000df8f43d in tbb::interface7::internal::isolate_impl<void, Task::operator()() const::{lambda()#1} const>(Task::operator()() const::{lambda()#1} const&) (f=...) at /media/data/blender_guest/lib/linux_centos7_x86_64/tbb/include/tbb/task_arena.h:160
#22 0x000000000df8f343 in tbb::interface7::this_task_arena::isolate<Task::operator()() const::{lambda()#1}>(tbb::interface7::internal::return_type_or_void const&) (f=...) at /media/data/blender_guest/lib/linux_centos7_x86_64/tbb/include/tbb/task_arena.h:395
#23 0x000000000df8f26f in Task::operator()() const (this=0x7fffb9c26ec8) at /media/data/blender_guest/blender_master/source/blender/blenlib/intern/task_pool.cc:118
#24 0x000000000df8f690 in tbb::internal::function_task<Task>::execute() (this=0x7fffb9c26ec0) at /media/data/blender_guest/lib/linux_centos7_x86_64/tbb/include/tbb/task.h:1048
#25 0x0000000003884385 in tbb::internal::custom_scheduler<tbb::internal::IntelSchedulerTraits>::process_bypass_loop(tbb::internal::context_guard_helper<false>&, tbb::task*, long) ()
#26 0x000000000388463b in tbb::internal::custom_scheduler<tbb::internal::IntelSchedulerTraits>::local_wait_for_all(tbb::task&, tbb::task*) ()
#27 0x0000000003876997 in tbb::internal::arena::process(tbb::internal::generic_scheduler&) ()
#28 0x000000000387e100 in tbb::internal::market::process(rml::job&) ()
#29 0x000000000388010c in tbb::internal::rml::private_worker::run() ()
#30 0x0000000003880309 in tbb::internal::rml::private_worker::thread_routine(void*) ()
#31 0x00007ffff7f8f609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#32 0x00007ffff796f103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95This seems to point again to some pose data not being up-to-date...
Slightly different steps leading to the same issue, this is fixed now in master.
Blender Version
Broken: version: 2.90.1, version: 2.92.0 Alpha, branch: master, commit date: 2020-10-22 10:41, hash: rBdea3b8d9844f
Worked: 2.82a (but there is no chain icon on the armature data block, so perhaps it was not even linked back then), 2.83.8 LTS
Short description of error
Blender crashes using make local on an armature of a linked collection with library override.
It does not crash under a certain condition: if you save the file after step 4) below, then revert the file, *don't* click the armature again (it's already active), just continue at step 5) it will not crash.
Reset to factory defaults did not prevent the crash.
Exact steps for others to reproduce the error
- Create a collection with e.g. a rigify human meta rig, add some mesh and parent it with automatic weights (might be unnecessary), save file.
- Create a new file, link the collection from the original file
- Object - Relations - Make Library Override
- Select Rig
- In the object data properties of the armature, click the chain icon to make local
- Crash