Blender 2.8 Crash on Select Text on Curve #57095

New Issue

Roel Koster · 2018-10-08T08:15:06+02:00

Roel Koster commented

2018-10-08 08:15:06 +02:00

System Information
OSX 10.14

Blender Version
Broken: Daily Builds
Worked: Release

Short description of error
After opening a blend file with text on curves, blender 2.8 crashes (NOT duplicate of fixed error #56879)

Exact steps for others to reproduce the error

Factory Defaults
remove cube
Create Bezier Circle
Create Text
Assign Bezier Circle to Text "Text on Curve Transform"
Go into EDIT mode to see the text wrapped around curve
Go into OBJECT mode
rotate text on z axis (don't know if this is needed)
SAVE file
QUIT blender
START blender
OPEN file
Right click text to select it
Crash (not always, sometimes takes several edits/saves/open)

I've been trying to reproduce this consistently, but it doesn't always produce a crash right away. Sometimes it takes a couple of edits/saves/reopening to get blender to crash. Or it has something to do with the rotation or what object is selected during save. I can't tell for sure. Did my best ;-)
But I've attached a very simple scene where you only have to open it and rightclick to select the text to observe the crash. Maybe by analyzing that file you can find the exact reason why.

crash3.blend

**System Information** OSX 10.14 **Blender Version** Broken: Daily Builds Worked: Release **Short description of error** After opening a blend file with text on curves, blender 2.8 crashes (NOT duplicate of fixed error #56879) **Exact steps for others to reproduce the error** - Factory Defaults - remove cube - Create Bezier Circle - Create Text - Assign Bezier Circle to Text "Text on Curve Transform" - Go into EDIT mode to see the text wrapped around curve - Go into OBJECT mode - rotate text on z axis (don't know if this is needed) - SAVE file - QUIT blender - START blender - OPEN file - Right click text to select it - Crash (not always, sometimes takes several edits/saves/open) I've been trying to reproduce this consistently, but it doesn't always produce a crash right away. Sometimes it takes a couple of edits/saves/reopening to get blender to crash. Or it has something to do with the rotation or what object is selected during save. I can't tell for sure. Did my best ;-) But I've attached a very simple scene where you only have to open it and **rightclick** to select the text to observe the crash. Maybe by analyzing that file you can find the exact reason why. [crash3.blend](https://archive.blender.org/developer/F4984584/crash3.blend)

Roel Koster commented

2018-10-08 08:15:07 +02:00

Added subscriber: @kostex

Philipp Oeser commented

2018-10-08 14:17:48 +02:00

Added subscribers: @mont29, @lichtwerk

Bastien Montagne was assigned by Philipp Oeser

2018-10-08 14:17:48 +02:00

Philipp Oeser commented

2018-10-08 14:17:48 +02:00

Can confirm the crash in you file.
Only happens when you have the N-Panel open (Transform specifically -> blender will try to calculate Dimensions then which leads to the crash)

1   raise                                                      0x7ffff1737eab 
2   abort                                                      0x7ffff17225b9 
3   BKE_vfont_to_curve_ex              font.c             1120 0x28733ea      
4   BKE_curve_minmax                   curve.c            5068 0x2816153      
5   BKE_curve_boundbox_calc            curve.c            310  0x28072e4      
6   BKE_curve_texspace_calc            curve.c            345  0x2807478      
7   BKE_curve_boundbox_get             curve.c            334  0x2807448      
8   BKE_object_boundbox_get            object.c           2536 0x29314f4      
9   BKE_object_dimensions_get          object.c           2564 0x29315e9      
10  rna_Object_dimensions_get          rna_object.c       895  0x2b820f0      
11  Object_dimensions_get              rna_object_gen.c   769  0x2b85758      
12  RNA_property_float_get_array       rna_access.c       2822 0x2a7ea7c

Now, as stated in the fix for #56879 (3a09ff77a1) BKE_vfont_to_curve_ex() expects evaluated data.
And thats the reason here, too (runtime curve_cache is NULL).

Not sure though, how to fix this, this is originating in RNA and I am unsure how to get a depsgrah here to reach evaluated data...
I'm kindly asking @mont29 for his wisdom here...

Can confirm the crash in you file. Only happens when you have the N-Panel open (`Transform` specifically -> blender will try to calculate `Dimensions` then which leads to the crash) ``` 1 raise 0x7ffff1737eab 2 abort 0x7ffff17225b9 3 BKE_vfont_to_curve_ex font.c 1120 0x28733ea 4 BKE_curve_minmax curve.c 5068 0x2816153 5 BKE_curve_boundbox_calc curve.c 310 0x28072e4 6 BKE_curve_texspace_calc curve.c 345 0x2807478 7 BKE_curve_boundbox_get curve.c 334 0x2807448 8 BKE_object_boundbox_get object.c 2536 0x29314f4 9 BKE_object_dimensions_get object.c 2564 0x29315e9 10 rna_Object_dimensions_get rna_object.c 895 0x2b820f0 11 Object_dimensions_get rna_object_gen.c 769 0x2b85758 12 RNA_property_float_get_array rna_access.c 2822 0x2a7ea7c ``` Now, as stated in the fix for #56879 (3a09ff77a1) BKE_vfont_to_curve_ex() expects evaluated data. And thats the reason here, too (runtime curve_cache is NULL). Not sure though, how to fix this, this is originating in RNA and I am unsure how to get a depsgrah here to reach evaluated data... I'm kindly asking @mont29 for his wisdom here...

Bastien Montagne commented

2018-10-08 17:20:35 +02:00

This has already been reported…

Bastien Montagne commented

2018-10-08 17:20:57 +02:00

Closed as duplicate of #56064

Bastien Montagne closed this issue

2018-10-08 17:20:57 +02:00

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Blender 2.8 Crash on Select Text on Curve #57095