https://bugs.freedesktop.org/show_bug.cgi?id=111802
Bug ID: 111802
Summary: SegFault missing slots in framebuffer
Product: Mesa
Version: git
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: not set
Priority: not set
Component: Drivers/Gallium/radeonsi
Assignee: dri-devel@lists.freedesktop.org
Reporter: jer...@blender.org
QA Contact: dri-devel@lists.freedesktop.org
This fault has been detected when using Blender (2.80 or master branch)
Steps to reproduce the error:
1. Start Blender
2. Go to edit mode (press tab)
3. Start Merge vertices tool (press ALT-M)
4. Select any mode (press ENTER)
And a segmentation fault happens.
This has been tested on Mesa 18.2.2, 19.0.8 and 19.3.0~dev.
The root cause is that you have a framebuffer with multiple color slots with
empty slots in between. If there is an empty color slot between the color
slots, all textures after this slot are apparently skipped/discarded.
Our work around is to reuse empty slots with other slots.
`gpu_framebuffer_update_attachments_and_fill_empty_slots`
in
https://developer.blender.org/diffusion/B/browse/master/source/blender/gpu/intern/gpu_framebuffer.c$429-483
This issue also existed in the official AMD drivers, but has been solved to our
knowledge.
https://developer.blender.org/T70187
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