New Depsgraph - Shrinkwrap crashes blender #52823

New Issue

Carlo Andreacchio · 2017-09-19T02:07:41+02:00

Carlo Andreacchio commented

2017-09-19 02:07:41 +02:00

System Information
Ubuntu 17.04 GTX 1080

Blender Version
Broken: bb4a12914f

Short description of error
Shrinkwraps sometimes crash blender

Exact steps for others to reproduce the error

open attached blend file with new depsgraph enabled
middle mouse rotate about 5 degrees
shift d a few times
should crash
bugShrinkwrap2.blend

**System Information** Ubuntu 17.04 GTX 1080 **Blender Version** Broken: bb4a12914fa **Short description of error** Shrinkwraps sometimes crash blender **Exact steps for others to reproduce the error** 1. open attached blend file with new depsgraph enabled 2. middle mouse rotate about 5 degrees 3. shift d a few times 4. should crash [bugShrinkwrap2.blend](https://archive.blender.org/developer/F818110/bugShrinkwrap2.blend)

Carlo Andreacchio commented

2017-09-19 02:07:41 +02:00

Changed status to: 'Open'

Carlo Andreacchio commented

2017-09-19 02:07:41 +02:00

Added subscriber: @candreacchio

Carlo Andreacchio commented

2017-09-19 02:11:37 +02:00

Cant reproduce on locally built blender, only blender from buildbot... backtrace is as follows:

/home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender(BLI_system_backtrace+0x20) [0x1a72fe0]
/home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender() [0x107db08]
/lib/x86_64-linux-gnu/libc.so.6(+0x357f0) [0x7ffff63ac7f0]
/home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender() [0x17693c7]
/home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender(bvhtree_from_mesh_looptri+0x180) [0x176b150]
/home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender(shrinkwrapModifier_deform+0x50d) [0x189365d]
/home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender() [0x174bc28]
/home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender() [0x174cdec]
/home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender(makeDerivedMesh+0x70) [0x174cef0]
/home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender(BKE_object_handle_data_update+0xf5) [0x183d525]
/home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender(BKE_object_eval_uber_data+0x34) [0x183da64]
/home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender() [0x1a87306]
/home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender() [0x1a7326f]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x76da) [0x7ffff79b86da]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x5f) [0x7ffff647fd7f]

Cant reproduce on locally built blender, only blender from buildbot... backtrace is as follows: ``` /home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender(BLI_system_backtrace+0x20) [0x1a72fe0] /home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender() [0x107db08] /lib/x86_64-linux-gnu/libc.so.6(+0x357f0) [0x7ffff63ac7f0] /home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender() [0x17693c7] /home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender(bvhtree_from_mesh_looptri+0x180) [0x176b150] /home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender(shrinkwrapModifier_deform+0x50d) [0x189365d] /home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender() [0x174bc28] /home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender() [0x174cdec] /home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender(makeDerivedMesh+0x70) [0x174cef0] /home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender(BKE_object_handle_data_update+0xf5) [0x183d525] /home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender(BKE_object_eval_uber_data+0x34) [0x183da64] /home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender() [0x1a87306] /home/user/blender/blender-2.79-bb4a12914fa-linux-glibc219-x86_64/blender() [0x1a7326f] /lib/x86_64-linux-gnu/libpthread.so.0(+0x76da) [0x7ffff79b86da] /lib/x86_64-linux-gnu/libc.so.6(clone+0x5f) [0x7ffff647fd7f] ```

Carlo Andreacchio commented

2017-09-19 02:20:21 +02:00

managed to get it to crash on the locally built blender by tabbing in and out of the base mesh a few times:

bpy.ops.object.editmode_toggle()  # Operator
bpy.ops.object.editmode_toggle()  # Operator
bpy.ops.object.editmode_toggle()  # Operator
bpy.ops.object.editmode_toggle()  # Operator
bpy.ops.object.editmode_toggle()  # Operator
bpy.ops.mesh.select_all(action='TOGGLE')  # Operator
bpy.ops.mesh.select_all(action='TOGGLE')  # Operator
bpy.ops.mesh.select_all(action='TOGGLE')  # Operator
bpy.ops.mesh.select_all(action='TOGGLE')  # Operator
bpy.ops.mesh.select_all(action='TOGGLE')  # Operator
bpy.ops.mesh.select_all(action='TOGGLE')  # Operator
bpy.ops.mesh.select_all(action='TOGGLE')  # Operator
bpy.ops.mesh.select_all(action='TOGGLE')  # Operator
bpy.ops.mesh.select_all(action='TOGGLE')  # Operator
bpy.ops.object.editmode_toggle()  # Operator

# backtrace
/home/user/blender/blender-git/build_linux/bin/blender(BLI_system_backtrace+0x30) [0x555556992270]
/home/user/blender/blender-git/build_linux/bin/blender(+0xa60a41) [0x555555fb4a41]
/lib/x86_64-linux-gnu/libc.so.6(+0x357f0) [0x7ffff12d97f0]
/home/user/blender/blender-git/build_linux/bin/blender(+0x11048cb) [0x5555566588cb]
/home/user/blender/blender-git/build_linux/bin/blender(bvhtree_from_mesh_looptri+0x200) [0x55555665a9b0]
/home/user/blender/blender-git/build_linux/bin/blender(shrinkwrapModifier_deform+0x5f2) [0x555556783f02]
/home/user/blender/blender-git/build_linux/bin/blender(+0x10e5cf0) [0x555556639cf0]
/home/user/blender/blender-git/build_linux/bin/blender(+0x10e6eb0) [0x55555663aeb0]
/home/user/blender/blender-git/build_linux/bin/blender(makeDerivedMesh+0x90) [0x55555663afd0]
/home/user/blender/blender-git/build_linux/bin/blender(BKE_object_handle_data_update+0x4a8) [0x555556733958]
/home/user/blender/blender-git/build_linux/bin/blender(BKE_object_eval_uber_data+0x34) [0x555556733af4]
/home/user/blender/blender-git/build_linux/bin/blender(+0x1452913) [0x5555569a6913]
/home/user/blender/blender-git/build_linux/bin/blender(+0x143e530) [0x555556992530]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x76da) [0x7ffff538a6da]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x5f) [0x7ffff13acd7f]

managed to get it to crash on the locally built blender by tabbing in and out of the base mesh a few times: ``` bpy.ops.object.editmode_toggle() # Operator bpy.ops.object.editmode_toggle() # Operator bpy.ops.object.editmode_toggle() # Operator bpy.ops.object.editmode_toggle() # Operator bpy.ops.object.editmode_toggle() # Operator bpy.ops.mesh.select_all(action='TOGGLE') # Operator bpy.ops.mesh.select_all(action='TOGGLE') # Operator bpy.ops.mesh.select_all(action='TOGGLE') # Operator bpy.ops.mesh.select_all(action='TOGGLE') # Operator bpy.ops.mesh.select_all(action='TOGGLE') # Operator bpy.ops.mesh.select_all(action='TOGGLE') # Operator bpy.ops.mesh.select_all(action='TOGGLE') # Operator bpy.ops.mesh.select_all(action='TOGGLE') # Operator bpy.ops.mesh.select_all(action='TOGGLE') # Operator bpy.ops.object.editmode_toggle() # Operator # backtrace /home/user/blender/blender-git/build_linux/bin/blender(BLI_system_backtrace+0x30) [0x555556992270] /home/user/blender/blender-git/build_linux/bin/blender(+0xa60a41) [0x555555fb4a41] /lib/x86_64-linux-gnu/libc.so.6(+0x357f0) [0x7ffff12d97f0] /home/user/blender/blender-git/build_linux/bin/blender(+0x11048cb) [0x5555566588cb] /home/user/blender/blender-git/build_linux/bin/blender(bvhtree_from_mesh_looptri+0x200) [0x55555665a9b0] /home/user/blender/blender-git/build_linux/bin/blender(shrinkwrapModifier_deform+0x5f2) [0x555556783f02] /home/user/blender/blender-git/build_linux/bin/blender(+0x10e5cf0) [0x555556639cf0] /home/user/blender/blender-git/build_linux/bin/blender(+0x10e6eb0) [0x55555663aeb0] /home/user/blender/blender-git/build_linux/bin/blender(makeDerivedMesh+0x90) [0x55555663afd0] /home/user/blender/blender-git/build_linux/bin/blender(BKE_object_handle_data_update+0x4a8) [0x555556733958] /home/user/blender/blender-git/build_linux/bin/blender(BKE_object_eval_uber_data+0x34) [0x555556733af4] /home/user/blender/blender-git/build_linux/bin/blender(+0x1452913) [0x5555569a6913] /home/user/blender/blender-git/build_linux/bin/blender(+0x143e530) [0x555556992530] /lib/x86_64-linux-gnu/libpthread.so.0(+0x76da) [0x7ffff538a6da] /lib/x86_64-linux-gnu/libc.so.6(clone+0x5f) [0x7ffff13acd7f] ```

Sergey Sharybin commented

2017-09-19 08:57:45 +02:00

Added subscriber: @Sergey

Sergey Sharybin self-assigned this 2017-09-19 08:57:45 +02:00

Sergey Sharybin commented

2017-09-19 08:57:45 +02:00

Hard to reproduce, and don't see anything wrong in depsgraph itself (all relations are correct). Suspect some threading conflict when building shrinkwrap target BVH. Could take a while to investigate :(

At the meantime, try running blender with --debug-depsgraph-no-threads command line argument and see if that fixes anything.

Hard to reproduce, and don't see anything wrong in depsgraph itself (all relations are correct). Suspect some threading conflict when building shrinkwrap target BVH. Could take a while to investigate :( At the meantime, try running blender with `--debug-depsgraph-no-threads` command line argument and see if that fixes anything.

Carlo Andreacchio commented

2017-09-19 09:14:00 +02:00

the --debug-depsgraph-no-threads does make it more stable definitely. The other thing we noticed was that if we triangulate the base mesh it seems to be a lot more stable as well. Not sure if that is of help at all with the bug hunting