Applying Array Modifier corrupt mesh #46455

New Issue

Lee June · 2015-10-12T15:48:28+02:00

Lee June commented

2015-10-12 15:48:28 +02:00

System Information
Win7 sp1 64bits, win 10 64 bits

Blender Version
Broken: official 274, 275a, 276
Worked: 249(Yeah, it is 249)

open my "bug.blend", select "Cylinder.001", press TAB into edit mode, press X to delete, then choose Vertices from the popup menu. Congratulates! Blender crashes immediately.

the file can be downloaded at
bug.zip
or
http://bbs.blendercn.org/forum.php?mod=attachment&aid=NjQxMXwxODQ4Yzc0Y3wxNDQ0NjU1NzIzfDE4fDI5NjQ%3D

thanks

**System Information** Win7 sp1 64bits, win 10 64 bits **Blender Version** Broken: official 274, 275a, 276 Worked: 249(Yeah, it is 249) open my "bug.blend", select "Cylinder.001", press TAB into edit mode, press X to delete, then choose Vertices from the popup menu. Congratulates! Blender crashes immediately. the file can be downloaded at [bug.zip](https://archive.blender.org/developer/F244472/bug.zip) or http://bbs.blendercn.org/forum.php?mod=attachment&aid=NjQxMXwxODQ4Yzc0Y3wxNDQ0NjU1NzIzfDE4fDI5NjQ%3D thanks

Lee June commented

2015-10-12 15:48:28 +02:00

Changed status to: 'Open'

Lee June commented

2015-10-12 15:48:28 +02:00

Added subscriber: @retsyo

blender-admin commented

2015-10-12 15:48:28 +02:00

#46690 was marked as duplicate of this issue

Bastien Montagne commented

2015-10-12 16:00:25 +02:00

Added subscriber: @mont29

Bastien Montagne commented

2015-10-12 16:00:25 +02:00

Crash confirmed, but the mesh is corrupted (tons of errors in verts usage by polygons, at least). Select your object and (still in Object mode) run C.object.data.validate(True) in python console, it will fix it and report all errors in OS console.

Now, what we need is to know how to reproduce such corruption, that’s the real bug, otherwise we cannot do anything.

Crash confirmed, but the mesh is corrupted (tons of errors in verts usage by polygons, at least). Select your object and (still in Object mode) run `C.object.data.validate(True)` in python console, it will fix it and report all errors in OS console. Now, what we need is to know **how** to reproduce such corruption, that’s the real bug, otherwise we cannot do anything.

Lee June commented

2015-10-12 16:42:46 +02:00

so nice, I found my file before applying modifier
to reproduce this, please follow these steps:

select "Cylinder.001", apply the 'array modifier'.
delete the 'curve modifier' which I mean to use later
goto edit mode
press X and choose 'vertices'

Before any operation, you may notice that the Cylinder.001 has a strange top. Maybe this causes the later crashes. As for this strange top, perhaps my beziercurve is the root.

bug2220.zip

so nice, I found my file before applying modifier to reproduce this, please follow these steps: 1. select "Cylinder.001", apply the 'array modifier'. 2. delete the 'curve modifier' which I mean to use later 3. goto edit mode 4. press X and choose 'vertices' Before any operation, you may notice that the Cylinder.001 has a strange top. Maybe this causes the later crashes. As for this strange top, perhaps my beziercurve is the root. [bug2220.zip](https://archive.blender.org/developer/F244496/bug2220.zip)

Lee June commented

2015-10-12 16:44:39 +02:00

In #46455#340984, @mont29 wrote:
Crash confirmed, but the mesh is corrupted (tons of errors in verts usage by polygons, at least). Select your object and (still in Object mode) run C.object.data.validate(True) in python console, it will fix it and report all errors in OS console.

Now, what we need is to know how to reproduce such corruption, that’s the real bug, otherwise we cannot do anything.

but 249 does not crash

> In #46455#340984, @mont29 wrote: > Crash confirmed, but the mesh is corrupted (tons of errors in verts usage by polygons, at least). Select your object and (still in Object mode) run `C.object.data.validate(True)` in python console, it will fix it and report all errors in OS console. > > Now, what we need is to know **how** to reproduce such corruption, that’s the real bug, otherwise we cannot do anything. but 249 does not crash

Bastien Montagne commented

2015-10-12 19:39:49 +02:00

Well, 2.49 as pretty much nothing to see with current blender really, mesh handling is totally different now with BMesh, etc.

Anyway, can confirm the issue, mesh is valid before applying array modifier, after it becomes invalid - and this also happen after save & reload with current master (i.e. with a modern .blend file)…

Well, 2.49 as pretty much nothing to see with current blender really, mesh handling is totally different now with BMesh, etc. Anyway, can confirm the issue, mesh is valid before applying array modifier, after it becomes invalid - and this also happen after save & reload with current master (i.e. with a modern .blend file)…

Bastien Montagne changed title from ~~delete operation crashes 274/275a/276~~ to Applying Array Modifier corrupt mesh

2015-10-12 19:40:22 +02:00

daniel commented

2015-12-21 17:35:16 +01:00

Added subscriber: @midan-3