2.8 beta crashes when converting curve to mesh #61353

New Issue

Ron Zandbergen · 2019-02-09T12:05:51+01:00

Ron Zandbergen commented

2019-02-09 12:05:51 +01:00

System Information
Operating system: win 64
Graphics card: GeForce GTX 1050 Ti

Blender Version
Broken: 2.8, blender-2.80-191b8951f7af-win64, download 9 feb 2019
Worked: (optional)

Short description of error
Using Circle Curve with Bezier Curve as bevel object. When converting Curve to Mesh blender crashes.

Exact steps for others to reproduce the error
See attached blend file.Bell 02.blend.

The issue here is that there is a cyclic dependency.
The bevel object of the circle is the curve and the bevel object of the curve is the circle.
Just open the curves.blend file and set the bevel object of the curve to the circle and hit convert to mesh.
curves.blend

**System Information** Operating system: win 64 Graphics card: GeForce GTX 1050 Ti **Blender Version** Broken: 2.8, blender-2.80-191b8951f7af-win64, download 9 feb 2019 Worked: (optional) **Short description of error** Using Circle Curve with Bezier Curve as bevel object. When converting Curve to Mesh blender crashes. **Exact steps for others to reproduce the error** See attached blend file.[Bell 02.blend](https://archive.blender.org/developer/F6558465/Bell_02.blend). The issue here is that there is a cyclic dependency. The bevel object of the circle is the curve and the bevel object of the curve is the circle. Just open the curves.blend file and set the bevel object of the curve to the circle and hit convert to mesh. [curves.blend](https://archive.blender.org/developer/F6591897/curves.blend)

Ron Zandbergen commented

2019-02-09 12:05:52 +01:00

Added subscriber: @Taaske

Sebastian Parborg commented

2019-02-09 13:49:27 +01:00

Added subscriber: @ZedDB

Campbell Barton was assigned by Sebastian Parborg

2019-02-09 13:49:27 +01:00

Sebastian Parborg commented

2019-02-09 13:49:27 +01:00

Backtrace:

Thread 1 "blender" received signal SIGSEGV, Segmentation fault.
0x0000555556884560 in curve_get_tessellate_point (scene=scene@entry=0x7fffce91c008, ob=ob@entry=0x7fffce5a0408,
    use_render_resolution=use_render_resolution@entry=false, editmode=editmode@entry=false)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:759
759		ModifierData *md = modifiers_getVirtualModifierList(ob, &virtualModifierData);
(gdb) bt
#0  0x0000555556884560 in curve_get_tessellate_point (scene=scene@entry=0x7fffce91c008, ob=ob@entry=0x7fffce5a0408,
    use_render_resolution=use_render_resolution@entry=false, editmode=editmode@entry=false)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:759
#1  0x00005555568847c8 in curve_calc_modifiers_pre (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=ob@entry=0x7fffce5a0408,
    nurb=nurb@entry=0x7fffff7ff570, for_render=for_render@entry=true, use_render_resolution=use_render_resolution@entry=false)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:825
#2  0x0000555556887b66 in do_makeDispListCurveTypes (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=0x7fffce5a0408,
    dispbase=0x7fffff7ff670, r_final=0x0, for_render=for_render@entry=true, for_orco=false, use_render_resolution=false)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:1591
#3  0x00005555568882d7 in BKE_displist_make_curveTypes_forRender (depsgraph=0x7fffe43fd608, scene=0x7fffce91c008, ob=<optimized out>,
    dispbase=dispbase@entry=0x7fffff7ff670, r_final=r_final@entry=0x0, for_orco=for_orco@entry=false, use_render_resolution=false)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:1836
#4  0x0000555556870d08 in BKE_curve_bevel_make (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=ob@entry=0x7fffce59fe08,
    disp=disp@entry=0x7fffff7ff7c0, for_render=for_render@entry=true, use_render_resolution=use_render_resolution@entry=false)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/curve.c:1855
#5  0x0000555556886f90 in do_makeDispListCurveTypes (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=0x7fffce59fe08,
    dispbase=0x7fffff7ff8d0, r_final=0x0, for_render=for_render@entry=true, for_orco=false, use_render_resolution=false)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:1596
#6  0x00005555568882d7 in BKE_displist_make_curveTypes_forRender (depsgraph=0x7fffe43fd608, scene=0x7fffce91c008, ob=<optimized out>,
    dispbase=dispbase@entry=0x7fffff7ff8d0, r_final=r_final@entry=0x0, for_orco=for_orco@entry=false, use_render_resolution=false)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:1836
#7  0x0000555556870d08 in BKE_curve_bevel_make (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=ob@entry=0x7fffce5a0408,
    disp=disp@entry=0x7fffff7ffa20, for_render=for_render@entry=true, use_render_resolution=use_render_resolution@entry=false)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/curve.c:1855
#8  0x0000555556886f90 in do_makeDispListCurveTypes (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=0x7fffce5a0408,
    dispbase=0x7fffff7ffb30, r_final=0x0, for_render=for_render@entry=true, for_orco=false, use_render_resolution=false)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:1596
#9  0x00005555568882d7 in BKE_displist_make_curveTypes_forRender (depsgraph=0x7fffe43fd608, scene=0x7fffce91c008, ob=<optimized out>,
    dispbase=dispbase@entry=0x7fffff7ffb30, r_final=r_final@entry=0x0, for_orco=for_orco@entry=false, use_render_resolution=false)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:1836
#10 0x0000555556870d08 in BKE_curve_bevel_make (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=ob@entry=0x7fffce59fe08,
    disp=disp@entry=0x7fffff7ffc80, for_render=for_render@entry=true, use_render_resolution=use_render_resolution@entry=false)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/curve.c:1855
#11 0x0000555556886f90 in do_makeDispListCurveTypes (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=0x7fffce59fe08,
    dispbase=0x7fffff7ffd90, r_final=0x0, for_render=for_render@entry=true, for_orco=false, use_render_resolution=false)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:1596
#12 0x00005555568882d7 in BKE_displist_make_curveTypes_forRender (depsgraph=0x7fffe43fd608, scene=0x7fffce91c008, ob=<optimized out>,
    dispbase=dispbase@entry=0x7fffff7ffd90, r_final=r_final@entry=0x0, for_orco=for_orco@entry=false, use_render_resolution=false)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:1836
#13 0x0000555556870d08 in BKE_curve_bevel_make (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=ob@entry=0x7fffce5a0408,
    disp=disp@entry=0x7fffff7ffee0, for_render=for_render@entry=true, use_render_resolution=use_render_resolution@entry=false)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/curve.c:1855
#14 0x0000555556886f90 in do_makeDispListCurveTypes (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=0x7fffce5a0408,
    dispbase=0x7fffff7ffff0, r_final=0x0, for_render=for_render@entry=true, for_orco=false, use_render_resolution=false)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:1596
#15 0x00005555568882d7 in BKE_displist_make_curveTypes_forRender (depsgraph=0x7fffe43fd608, scene=0x7fffce91c008, ob=<optimized out>,
    dispbase=dispbase@entry=0x7fffff7ffff0, r_final=r_final@entry=0x0, for_orco=for_orco@entry=false, use_render_resolution=false)

Backtrace: ``` Thread 1 "blender" received signal SIGSEGV, Segmentation fault. 0x0000555556884560 in curve_get_tessellate_point (scene=scene@entry=0x7fffce91c008, ob=ob@entry=0x7fffce5a0408, use_render_resolution=use_render_resolution@entry=false, editmode=editmode@entry=false) at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:759 759 ModifierData *md = modifiers_getVirtualModifierList(ob, &virtualModifierData); (gdb) bt #0 0x0000555556884560 in curve_get_tessellate_point (scene=scene@entry=0x7fffce91c008, ob=ob@entry=0x7fffce5a0408, use_render_resolution=use_render_resolution@entry=false, editmode=editmode@entry=false) at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:759 #1 0x00005555568847c8 in curve_calc_modifiers_pre (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=ob@entry=0x7fffce5a0408, nurb=nurb@entry=0x7fffff7ff570, for_render=for_render@entry=true, use_render_resolution=use_render_resolution@entry=false) at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:825 #2 0x0000555556887b66 in do_makeDispListCurveTypes (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=0x7fffce5a0408, dispbase=0x7fffff7ff670, r_final=0x0, for_render=for_render@entry=true, for_orco=false, use_render_resolution=false) at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:1591 #3 0x00005555568882d7 in BKE_displist_make_curveTypes_forRender (depsgraph=0x7fffe43fd608, scene=0x7fffce91c008, ob=<optimized out>, dispbase=dispbase@entry=0x7fffff7ff670, r_final=r_final@entry=0x0, for_orco=for_orco@entry=false, use_render_resolution=false) at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:1836 #4 0x0000555556870d08 in BKE_curve_bevel_make (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=ob@entry=0x7fffce59fe08, disp=disp@entry=0x7fffff7ff7c0, for_render=for_render@entry=true, use_render_resolution=use_render_resolution@entry=false) at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/curve.c:1855 #5 0x0000555556886f90 in do_makeDispListCurveTypes (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=0x7fffce59fe08, dispbase=0x7fffff7ff8d0, r_final=0x0, for_render=for_render@entry=true, for_orco=false, use_render_resolution=false) at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:1596 #6 0x00005555568882d7 in BKE_displist_make_curveTypes_forRender (depsgraph=0x7fffe43fd608, scene=0x7fffce91c008, ob=<optimized out>, dispbase=dispbase@entry=0x7fffff7ff8d0, r_final=r_final@entry=0x0, for_orco=for_orco@entry=false, use_render_resolution=false) at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:1836 #7 0x0000555556870d08 in BKE_curve_bevel_make (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=ob@entry=0x7fffce5a0408, disp=disp@entry=0x7fffff7ffa20, for_render=for_render@entry=true, use_render_resolution=use_render_resolution@entry=false) at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/curve.c:1855 #8 0x0000555556886f90 in do_makeDispListCurveTypes (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=0x7fffce5a0408, dispbase=0x7fffff7ffb30, r_final=0x0, for_render=for_render@entry=true, for_orco=false, use_render_resolution=false) at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:1596 #9 0x00005555568882d7 in BKE_displist_make_curveTypes_forRender (depsgraph=0x7fffe43fd608, scene=0x7fffce91c008, ob=<optimized out>, dispbase=dispbase@entry=0x7fffff7ffb30, r_final=r_final@entry=0x0, for_orco=for_orco@entry=false, use_render_resolution=false) at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:1836 #10 0x0000555556870d08 in BKE_curve_bevel_make (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=ob@entry=0x7fffce59fe08, disp=disp@entry=0x7fffff7ffc80, for_render=for_render@entry=true, use_render_resolution=use_render_resolution@entry=false) at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/curve.c:1855 #11 0x0000555556886f90 in do_makeDispListCurveTypes (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=0x7fffce59fe08, dispbase=0x7fffff7ffd90, r_final=0x0, for_render=for_render@entry=true, for_orco=false, use_render_resolution=false) at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:1596 #12 0x00005555568882d7 in BKE_displist_make_curveTypes_forRender (depsgraph=0x7fffe43fd608, scene=0x7fffce91c008, ob=<optimized out>, dispbase=dispbase@entry=0x7fffff7ffd90, r_final=r_final@entry=0x0, for_orco=for_orco@entry=false, use_render_resolution=false) at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:1836 #13 0x0000555556870d08 in BKE_curve_bevel_make (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=ob@entry=0x7fffce5a0408, disp=disp@entry=0x7fffff7ffee0, for_render=for_render@entry=true, use_render_resolution=use_render_resolution@entry=false) at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/curve.c:1855 #14 0x0000555556886f90 in do_makeDispListCurveTypes (depsgraph=depsgraph@entry=0x7fffe43fd608, scene=scene@entry=0x7fffce91c008, ob=0x7fffce5a0408, dispbase=0x7fffff7ffff0, r_final=0x0, for_render=for_render@entry=true, for_orco=false, use_render_resolution=false) at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/displist.c:1596 #15 0x00005555568882d7 in BKE_displist_make_curveTypes_forRender (depsgraph=0x7fffe43fd608, scene=0x7fffce91c008, ob=<optimized out>, dispbase=dispbase@entry=0x7fffff7ffff0, r_final=r_final@entry=0x0, for_orco=for_orco@entry=false, use_render_resolution=false) ```

Dalai Felinto commented

2019-02-12 17:49:53 +01:00

Added subscriber: @dfelinto

Dalai Felinto commented

2019-02-12 17:49:53 +01:00

@Taaske Could you provide us with a simple sample created with 2.79 that reproduces the issue right before the conversion happens?
Right now when opening your file I get an immediate crash: curve.c:1862, BKE_curve_bevel_make(), at 'cu->bevobj->runtime.curve_cache != ((void *)0)'

@Taaske Could you provide us with a simple sample created with 2.79 that reproduces the issue right before the conversion happens? Right now when opening your file I get an immediate crash: `curve.c:1862, BKE_curve_bevel_make(), at 'cu->bevobj->runtime.curve_cache != ((void *)0)'`

Dalai Felinto commented

2019-02-12 17:54:18 +01:00

For the records, by following your instructions I cannot reproduce the crash:
curves.blend

For the records, by following your instructions I cannot reproduce the crash: [curves.blend](https://archive.blender.org/developer/F6591897/curves.blend)

Campbell Barton commented

2019-02-13 05:11:29 +01:00

Also getting immediate assert and curves.blend converts as expected.

Also getting immediate assert and `curves.blend` converts as expected.

Sebastian Parborg commented

2019-02-13 09:13:36 +01:00

Just to reiterate what I told @dfelinto on IRC yesterday.
The issue here is that it the .blend that asserts for you guys, there is a cyclic dependency.

The bevel object of the circle is the curve and the bevel object of the curve is the circle.
Just open the curves.blend file and set the bevel object of the curve to the circle and hit convert to mesh.

Just to reiterate what I told @dfelinto on IRC yesterday. The issue here is that it the .blend that asserts for you guys, there is a cyclic dependency. The bevel object of the circle is the curve and the bevel object of the curve is the circle. Just open the `curves.blend` file and set the bevel object of the curve to the circle and hit convert to mesh.

Ron Zandbergen commented

2019-02-13 11:51:55 +01:00

Do you guys still need the requested sample in 2.79 or does the above post from sebastian cover this.

Philipp Oeser commented

2019-02-13 12:14:22 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2019-02-13 12:14:22 +01:00

@Taaske : I think thats fine... (no need for the 2.79 file)

I think we can be a bit smarter in rna_Curve_otherObject_poll, checking...

@Taaske : I think thats fine... (no need for the 2.79 file) I think we can be a bit smarter in `rna_Curve_otherObject_poll`, checking...

Philipp Oeser commented

2019-02-13 13:36:50 +01:00

Was just an idea to avoid cyclic dependencies when picking curve bevobj/taperobj: P912
(but I guess a bad one because it doesnt cover everything...)

Anyways, this doesnt add anything to solving the crash, sorry for the noise...

Was just an idea to avoid cyclic dependencies when picking curve bevobj/taperobj: [P912](https://archive.blender.org/developer/P912.txt) (but I guess a bad one because it doesnt cover everything...) Anyways, this doesnt add anything to solving the crash, sorry for the noise...

Philipp Oeser commented

2019-02-13 13:42:53 +01:00

@ideasman42 : is this OK to stay on your desk?

blender-admin commented

2019-02-14 07:21:55 +01:00

This issue was referenced by 6074f62d1a

This issue was referenced by 6074f62d1a099fc378aa25506a93321dba2d956b

Campbell Barton commented

2019-02-14 07:32:55 +01:00

Changed status from 'Open' to: 'Resolved'

Campbell Barton closed this issue

2019-02-14 07:32:55 +01:00

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2.8 beta crashes when converting curve to mesh #61353