Shift-D in edit mode, with normal map node connected to material causes exception #78334

New Issue

Hidde H · 2020-06-27T01:04:52+02:00

Hidde H commented

2020-06-27 01:04:52 +02:00

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 970/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 451.48
Ryzen 1700 , 32Gb 2400 DDR4

Blender Version
Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-06-25 21:53, hash: 62aa103d48
Worked: 2.83

Duplicating an object in edit mode using shift-D causes a crash when a normal map node ( With or without inputs populated) is connected to any of the appropriate inputs on a BSDF shader (Principled/Glossy/Volume..haven't tested others).
Unable to replicate in 2.83.0 LTS.
Frequent, but inconsistent startup crashes when restarting 2.9 after reproducing the exception. Sometimes on start, sometimes on opening file, sometimes ok.

Exact steps for others to reproduce the error
1- Blank startup file
2- Create Cube
3- Create/Assign Material
4- Create and connect normal map node to normal input of BSDF
5- Enter edit mode
6- Select cube in vertex, edge or face mode
7- Shift-D to duplicate selection

After repeated reproduction of the exception, opening the file showed corrupted geometry. The cube was completely sheared into what seemed infinity.
Opening the same file in 2.83 gave no issues. Opening it again in 2.93 resolved the shearing.
Must be something funky going on with the temp directory files?

Thanks for the awesome work on Blender <3

shift-D_EditMode_Exception.blend

2.9-shift-D_EditMode_Exception.crash.txt

**System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: GeForce GTX 970/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 451.48 Ryzen 1700 , 32Gb 2400 DDR4 **Blender Version** Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-06-25 21:53, hash: `62aa103d48` Worked: 2.83 Duplicating an object in edit mode using shift-D causes a crash when a normal map node ( With or without inputs populated) is connected to any of the appropriate inputs on a BSDF shader (Principled/Glossy/Volume..haven't tested others). Unable to replicate in 2.83.0 LTS. Frequent, but inconsistent startup crashes when restarting 2.9 after reproducing the exception. Sometimes on start, sometimes on opening file, sometimes ok. **Exact steps for others to reproduce the error** 1- Blank startup file 2- Create Cube 3- Create/Assign Material 4- Create and connect normal map node to normal input of BSDF 5- Enter edit mode 6- Select cube in vertex, edge or face mode 7- Shift-D to duplicate selection After repeated reproduction of the exception, opening the file showed corrupted geometry. The cube was completely sheared into what seemed infinity. Opening the same file in 2.83 gave no issues. Opening it again in 2.93 resolved the shearing. Must be something funky going on with the temp directory files? Thanks for the awesome work on Blender <3 [shift-D_EditMode_Exception.blend](https://archive.blender.org/developer/F8646055/shift-D_EditMode_Exception.blend) [2.9-shift-D_EditMode_Exception.crash.txt](https://archive.blender.org/developer/F8646056/2.9-shift-D_EditMode_Exception.crash.txt)

Hidde H commented

2020-06-27 01:04:52 +02:00

Added subscriber: @mOOngaze

Vincent Blankfield commented

2020-06-29 13:03:42 +02:00

Added subscriber: @VincentBlankfield

Vincent Blankfield commented

2020-06-29 13:03:42 +02:00

Same as #78361 similar to #78054.
Seems to be introduced in 8f97a64dec

Test that covers all the issues:

1. Grab the normal_map.tangent_space_bug_r1.blend file from #78054
1. Open it, make sure the viewport is in material preview or render mode
3a. Press and hold Tab to quickly switch to and from edit mode. Expect crash while holding it.
3b. In object mode select one of the cubes. Go to edit mode. Add loop cut with Ctrl+R. Expect crash when the loop cut is added.
3c. In edit mode select some geometry. Press Shift+D to duplicate. Expect crash when duplicate is created.

3b and 3c will also crash with the default cube in the default scene, as long as the viewport is in rendered/lookdev mode and the cube has a normal map connected to the normal input of it's BSDF (empty normal map node will do).

In case of 3b and 3c the crash occurs in BLI_mempool.c:352 void *BLI_mempool_alloc(BLI_mempool *pool):

 pool->free = free_pop->next;
 /*
 unable to read free_pop->next (free_pop->free is 0x3f0000003ec00000)
 where free_pop is dest->pool from CustomData_bmesh_copy_data_exclude_by_type(const CustomData *source,
                                                                              CustomData *dest,
                                                                              void *src_block,
                                                                              void **dest_block,
                                                                              const CustomDataMask mask_exclude)
 */

In case of 3a it crashes not so frequently in random places (after 8f97a64dec).

Same as #78361 similar to #78054. Seems to be introduced in 8f97a64dec Test that covers all the issues: - 1. Grab the [normal_map.tangent_space_bug_r1.blend file ](https://dev-files.blender.org/file/download/2niegnbaosk4seyk353s/PHID-FILE-bkmztclnvqzqehflxu24/normal_map.tangent_space_bug_r1.blend) from #78054 - 2. Open it, make sure the viewport is in material preview or render mode - 3a. Press and hold `Tab` to quickly switch to and from edit mode. Expect crash while holding it. - 3b. In object mode select one of the cubes. Go to edit mode. Add loop cut with `Ctrl+R`. Expect crash when the loop cut is added. - 3c. In edit mode select some geometry. Press `Shift+D` to duplicate. Expect crash when duplicate is created. *3b* and *3c* will also crash with the default cube in the default scene, as long as the viewport is in rendered/lookdev mode and the cube has a normal map connected to the normal input of it's BSDF (empty normal map node will do). In case of *3b* and *3c* the crash occurs in `BLI_mempool.c:352 void *BLI_mempool_alloc(BLI_mempool *pool)`: ``` pool->free = free_pop->next; /* unable to read free_pop->next (free_pop->free is 0x3f0000003ec00000) where free_pop is dest->pool from CustomData_bmesh_copy_data_exclude_by_type(const CustomData *source, CustomData *dest, void *src_block, void **dest_block, const CustomDataMask mask_exclude) */ ``` In case of 3a it crashes not so frequently in random places (after 8f97a64dec).

Philipp Oeser commented

2020-06-29 13:38:04 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-06-29 13:38:04 +02:00

I have confirmed #78361 (Blender crashes on many modeling operations (loopcut, extrude, duplication, ...) on mesh with normal map node connected to material), so will treat this as a duplicate (even though this is older) -- thx reporting and investigating @VincentBlankfield !

Philipp Oeser commented

2020-06-29 13:38:13 +02:00

Closed as duplicate of #78361

Philipp Oeser closed this issue

2020-06-29 13:38:13 +02:00

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Shift-D in edit mode, with normal map node connected to material causes exception #78334