[ISSUE] Blender crashes on startup

[ISSUE] Blender crashes on startup

[MechDR]

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New issue by MechDR on void-packages repository

https://github.com/void-linux/void-packages/issues/49763

Description:
### Is this a new report?

Yes

### System Info

Void 6.6.25_1 x86_64 GenuineIntel notuptodate rrrmFFFFFFFFF

### Package(s) Affected

blender-4.0.2_2

### Does a report exist for this bug with the project's home (upstream) and/or another distro?

_No response_

### Expected behaviour

Start up... or at least spit out something regarding the GPU not being compatible, because I have no idea if it is (AMD Radeon HD 4650).

But, I also tested it on 2 other PCs, both with older Intel onboard graphics (one has a 2nd gen i3, the other has a G41 GPU, Dual/Quad core era), it just crashes there as well

### Actual behaviour

Her is what `tmp\blender.crash.txt` holds.

````
# Blender 4.0.2, Unknown revision

# backtrace
blender(+0xf43dd3) [0x555c3770edd3]
blender(+0x862ea9) [0x555c3702dea9]
/usr/lib/libc.so.6(+0x3f8c0) [0x7fe78a3738c0]
blender(+0xf8a15c) [0x555c3775515c]
blender(+0xf8a1bd) [0x555c377551bd]
blender(+0xf53d04) [0x555c3771ed04]
blender(+0xf6998e) [0x555c3773498e]
blender(+0xf6f124) [0x555c3773a124]
blender(+0x8385e8) [0x555c370035e8]
/usr/lib/libc.so.6(+0x29c4c) [0x7fe78a35dc4c]
/usr/lib/libc.so.6(__libc_start_main+0x85) [0x7fe78a35dd05]
blender(+0x85e8b1) [0x555c370298b1]

# Python backtrace
````

### Steps to reproduce

Try running it on unsupported hardware (in a VM for example, with no GPU passthrough), because I think that is the actual problem, since no one has filed a bug report yet, which means for people with newer hardware and use it, it works just fine.

Re: Blender crashes on startup

[oreo639]

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New comment by oreo639 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2045935105

Comment:
Can you share the backtrace with debug symbols? (Add the debug repo and install blender-dbg)

Re: Blender crashes on startup

[oreo639]

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New comment by oreo639 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2045935105

Comment:
Can you share the backtrace with debug symbols? (Add the debug repo and install blender-dbg)

You might need to use `gdb`, in which case do `gdb blender`, then do `run` and when the application crashes, do `bt`.

Re: Blender crashes on startup

[MechDR]

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New comment by MechDR on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2048240387

Comment:
@oreo639 Mhm, OK, I'll try.

Re: Blender crashes on startup

[MechDR]

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New comment by MechDR on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2053784642

Comment:
@oreo639 OK, here's what it spew.

````
#0  wm_window_set_drawable (activate=false, win=0x0, wm=0x7fffe4bc6c08) at ../source/blender/windowmanager/intern/wm_window.cc:1235
#1  wm_window_ghostwindow_add (title=0x555558d9b801 "Blender", is_dialog=<optimized out>, win=0x7fffe43acd08, wm=0x7fffe4bc6c08)
    at ../source/blender/windowmanager/intern/wm_window.cc:785
#2  wm_window_ghostwindow_ensure (wm=0x7fffe4bc6c08, win=0x7fffe43acd08, is_dialog=<optimized out>)
    at ../source/blender/windowmanager/intern/wm_window.cc:817
#3  0x00005555564de1bd in wm_window_ghostwindows_ensure (wm=wm@entry=0x7fffe4bc6c08)
    at ../source/blender/windowmanager/intern/wm_window.cc:874
#4  0x00005555564a7d04 in WM_check (C=C@entry=0x7fffe6398b88) at ../source/blender/windowmanager/intern/wm.cc:483
#5  0x00005555564bd98e in wm_homefile_read_ex (C=C@entry=0x7fffe6398b88, params_homefile=params_homefile@entry=0x7fffffffe6b0, 
    reports=reports@entry=0x0, r_params_file_read_post=r_params_file_read_post@entry=0x7fffffffe6a8)
    at ../source/blender/windowmanager/intern/wm_files.cc:1476
#6  0x00005555564c3124 in WM_init (C=C@entry=0x7fffe6398b88, argc=argc@entry=1, argv=argv@entry=0x7fffffffe888)
    at ../source/blender/windowmanager/intern/wm_init_exit.cc:302
#7  0x0000555555d8c5e8 in main (argc=1, argv=0x7fffffffe888) at ../source/creator/creator.cc:537
````

Re: Blender crashes on startup

[oreo639]

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New comment by oreo639 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2054394443

Comment:
The crash is a nullptr dereference here: https://github.com/blender/blender/blob/v4.0.2/source/blender/windowmanager/intern/wm_window.cc#L1235

What desktop environment are you using? Doe this happen with the Blender flatpak?

Re: Blender crashes on startup

[oreo639]

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New comment by oreo639 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2054394443

Comment:
The crash is a nullptr dereference here: https://github.com/blender/blender/blob/v4.0.2/source/blender/windowmanager/intern/wm_window.cc#L1235

What desktop environment are you using? Does this happen with the Blender flatpak?

Re: Blender crashes on startup

[MechDR]

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New comment by MechDR on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2059424318

Comment:
@oreo639 xfce4. No, I haven't tried the flatpack, but I will.

Re: Blender crashes on startup

[MechDR]

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New comment by MechDR on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2059424318

Comment:
@oreo639 xfce4. No, I haven't tried the flatpak, but I will.

Re: Blender crashes on startup

[MechDR]

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New comment by MechDR on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2059447434

Comment:
Yep, it crashes again with the same crash report.

````
# Blender 4.0.2, Unknown revision

# backtrace
blender(+0xf43dd3) [0x55bff141fdd3]
blender(+0x862ea9) [0x55bff0d3eea9]
/usr/lib/libc.so.6(+0x3f8c0) [0x7f03f56558c0]
blender(+0xf8a15c) [0x55bff146615c]
blender(+0xf8a1bd) [0x55bff14661bd]
blender(+0xf53d04) [0x55bff142fd04]
blender(+0xf6998e) [0x55bff144598e]
blender(+0xf6f124) [0x55bff144b124]
blender(+0x8385e8) [0x55bff0d145e8]
/usr/lib/libc.so.6(+0x29c4c) [0x7f03f563fc4c]
/usr/lib/libc.so.6(__libc_start_main+0x85) [0x7f03f563fd05]
blender(+0x85e8b1) [0x55bff0d3a8b1]

# Python backtrace
````

Re: Blender crashes on startup

[MechDR]

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New comment by MechDR on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2097618164

Comment:
This still isn't resolved...

Re: Blender crashes on startup

[naoNao89]

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New comment by naoNao89 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2097861452

Comment:
@MechDR Try running Blender with different command-line options or environment variables that may help diagnose the issue
```
 blender --debug-all or MESA_DEBUG=1 blender
```

Re: Blender crashes on startup

[MechDR]

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New comment by MechDR on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2109514269

Comment:
OK, here is what `blender --debug-all` says.

````
Switching to fully guarded memory allocator.
graph_id_tag_update: id=SCScene flags=BASE_FLAGS source=USER_EDIT
DEG_relations_tag_update: Tagging relations for update.
graph_id_tag_update: id=GRScene Collection flags=COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=SCScene flags=COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=GRCollection flags=COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=GROVERRIDE_RESYNC_LEFTOVERS flags=COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=GRScene Collection flags=COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=SCScene flags=COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=GRCollection flags=COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=GROVERRIDE_RESYNC_LEFTOVERS flags=COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=GRScene Collection flags=COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=SCScene flags=COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=GRCollection flags=COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=GROVERRIDE_RESYNC_LEFTOVERS flags=COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=GRScene Collection flags=TRANSFORM, GEOMETRY, COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=SCScene flags=TRANSFORM, GEOMETRY, COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=SCScene flags=TRANSFORM, GEOMETRY, COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=GRScene Collection flags=COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=SCScene flags=COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=GRCollection flags=COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=GROVERRIDE_RESYNC_LEFTOVERS flags=COPY_ON_WRITE source=USER_EDIT
DEG_relations_tag_update: Tagging relations for update.
DEG_relations_tag_update: Tagging relations for update.
DEG_relations_tag_update: Tagging relations for update.
graph_id_tag_update: id=GRScene Collection flags=COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=SCScene flags=COPY_ON_WRITE source=USER_EDIT
graph_id_tag_update: id=GRCollection flags=COPY_ON_WRITE source=USER_EDIT
Received X11 Error:
	error code:   170
	request code: 153
	minor code:   0
	error text:   GLXBadFBConfig
Received X11 Error:
	error code:   170
	request code: 153
	minor code:   0
	error text:   GLXBadFBConfig
Received X11 Error:
	error code:   170
	request code: 153
	minor code:   0
	error text:   GLXBadFBConfig
Received X11 Error:
	error code:   170
	request code: 153
	minor code:   0
	error text:   GLXBadFBConfig
Writing: /tmp/blender.crash.txt
fish: Job 1, 'blender --debug-all' terminated by signal SIGSEGV (Address boundary error)
````
As for `MESA_DEBUG=1 blender`, it basically does the same thing as just running `blender`, crashes and writes to `blender.crash.txt`.

````
Writing: /tmp/blender.crash.txt
fish: Job 1, 'MESA_DEBUG=1 blender' terminated by signal SIGSEGV (Address boundary error)
````

And there is nothing new in `blender.crash.txt`, it's the same thing as if you just run `blender`.

````
# Blender 4.0.2, Unknown revision

# backtrace
blender(+0xf43dd3) [0x5568b1097dd3]
blender(+0x862ea9) [0x5568b09b6ea9]
/usr/lib/libc.so.6(+0x3f8c0) [0x7f90396558c0]
blender(+0xf8a15c) [0x5568b10de15c]
blender(+0xf8a1bd) [0x5568b10de1bd]
blender(+0xf53d04) [0x5568b10a7d04]
blender(+0xf6998e) [0x5568b10bd98e]
blender(+0xf6f124) [0x5568b10c3124]
blender(+0x8385e8) [0x5568b098c5e8]
/usr/lib/libc.so.6(+0x29c4c) [0x7f903963fc4c]
/usr/lib/libc.so.6(__libc_start_main+0x85) [0x7f903963fd05]
blender(+0x85e8b1) [0x5568b09b28b1]

# Python backtrace
````

Re: Blender crashes on startup

[MechDR]

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New comment by MechDR on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2119025385

Comment:
Still relevant...

Re: Blender crashes on startup

[MechDR]

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New comment by MechDR on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2130494277

Comment:
Bump.

Re: Blender crashes on startup

[fruitiestPunch]

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New comment by fruitiestPunch on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185738238

Comment:
I wonder if this problem is caused on Void's side or rather on Blender's side.
Any ideas?
If it's because Blender is messing something up, I'd go to Blenders GH and create a new issue and link to this one.

Re: Blender crashes on startup

[oreo639]

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New comment by oreo639 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185760108

Comment:
> I wonder if this problem is caused on Void's side or rather on Blender's side.

I highly doubt it. It is a nullptr dereference in upstream code and was reproduced by OP in the Blender flatpak.

Re: Blender crashes on startup

[oreo639]

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New comment by oreo639 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185760108

Comment:
> I wonder if this problem is caused on Void's side or rather on Blender's side.

I highly doubt it. It is a nullptr dereference in upstream code and was reproduced by OP in the Blender flatpak.

As for why `wmWindow` seemingly suddenly becomes a nullptr in the `wm_window_set_drawable()`, idk.
I can't reproduce it so there isn't much I can do.

Re: Blender crashes on startup

[oreo639]

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New comment by oreo639 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185760108

Comment:
> I wonder if this problem is caused on Void's side or rather on Blender's side.

I highly doubt it. It is a nullptr dereference in upstream code and was reproduced by OP in the Blender flatpak.

As for why `wmWindow` seemingly suddenly becomes a nullptr in the `wm_window_set_drawable()`, idk.
Idk how to reproduce it.

Re: Blender crashes on startup

[oreo639]

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New comment by oreo639 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185760108

Comment:
> I wonder if this problem is caused on Void's side or rather on Blender's side.

I highly doubt it. It is a nullptr dereference in upstream code and was reproduced by OP in the Blender flatpak.

As for why `wmWindow` seemingly suddenly becomes a nullptr when calling `wm_window_set_drawable()`, idk.
Idk how to reproduce it.

Re: Blender crashes on startup

[fruitiestPunch]

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New comment by fruitiestPunch on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185768387

Comment:
I dug a little and compared Blender 4.0.1 with Blender 3.6.12 (this one and v3.3. work for me) and 
`GPU_context_active_set(static_cast<GPUContext *>(win->gpuctx));`
lead me to
https://github.com/blender/blender/blob/9be62e85b7270d3d2e5bcc846420b91bab3988f9/source/blender/gpu/GPU_context.h#L65
where even the doc string states that it can be NULL (in v4 and v3.6).
I think the issue lies in the 'static_cast'.

Re: Blender crashes on startup

[oreo639]

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New comment by oreo639 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185760108

Comment:
> I wonder if this problem is caused on Void's side or rather on Blender's side.

I highly doubt it. It is a nullptr dereference in upstream code and was reproduced by OP in the Blender flatpak.

In this case, it calls `wm_window_set_drawable(wm, prev_windrawable, false);`

Re: Blender crashes on startup

[oreo639]

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New comment by oreo639 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185760108

Comment:
> I wonder if this problem is caused on Void's side or rather on Blender's side.

I highly doubt it. It is a nullptr dereference in upstream code and was reproduced by OP in the Blender flatpak.

In this case, it calls `wm_window_set_drawable(wm, prev_windrawable, false)` when `wm->windrawable` is NULL because `GHOST_CreateWindow()` fails.

Re: Blender crashes on startup

[fruitiestPunch]

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New comment by fruitiestPunch on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185768387

Comment:
I dug a little and compared Blender 4.0.1 with Blender 3.6.12 (this one and v3.3. work for me) and 
`GPU_context_active_set(static_cast<GPUContext *>(win->gpuctx));`
lead me to
https://github.com/blender/blender/blob/9be62e85b7270d3d2e5bcc846420b91bab3988f9/source/blender/gpu/GPU_context.h#L65
where even the doc string states that it can be NULL (in v4 and v3.6).
This only difference is the STATIC_CASTING in v4. 
I will try to see, if
a) removing the 'static_cast' or
b) adding a nullptr-check before casting
will resolve the issue.

Re: Blender crashes on startup

[oreo639]

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New comment by oreo639 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185773058

Comment:
`win->gpuctx` is equivalent to `(*win).gpuctx`, in this case `win` is null because `GHOST_CreateWindow()` fails and `wm->windrawable` is NULL.

Re: Blender crashes on startup

[oreo639]

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New comment by oreo639 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185773058

Comment:
`win->gpuctx` is equivalent to `(*win).gpuctx`, in this case `win` is null because `GHOST_CreateWindow()` fails and `wm->windrawable` is NULL.

Either way, assuming this can still be reproduced on the latest official release, this should be reported upstream.

Re: Blender crashes on startup

[oreo639]

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New comment by oreo639 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185773058

Comment:
`win->gpuctx` is equivalent to `(*win).gpuctx`, in this case `win` is NULL because `GHOST_CreateWindow()` fails and `wm->windrawable` is NULL.

Either way, assuming this can still be reproduced on the latest official release, this should be reported upstream.

Re: Blender crashes on startup

[oreo639]

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New comment by oreo639 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185773058

Comment:
`win->gpuctx` is equivalent to `(*win).gpuctx` (which dereferences win), in this case `win` is NULL because `GHOST_CreateWindow()` fails and `wm->windrawable` is NULL.

Either way, assuming this can still be reproduced on the latest official release, this should be reported upstream.

Re: Blender crashes on startup

[oreo639]

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New comment by oreo639 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185773058

Comment:
`win->gpuctx` is equivalent to `(*win).gpuctx` (which dereferences win), in this case `win` is NULL because `GHOST_CreateWindow()` failed for whatever reason and `wm->windrawable` is NULL.

Either way, assuming this can still be reproduced on the latest official release, this should be reported upstream.

Re: Blender crashes on startup

[oreo639]

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New comment by oreo639 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185773058

Comment:
`win->gpuctx` is equivalent to `(*win).gpuctx` (which dereferences win), in this case `win` is NULL because `GHOST_CreateWindow()` failed for whatever reason and `wm->windrawable` is NULL.

Either way, assuming this can still be reproduced on the latest official release, this should be reported upstream.
I can't reproduce it so there isn't much I can do about it.

Re: Blender crashes on startup

[oreo639]

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New comment by oreo639 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185773058

Comment:
`win->gpuctx` is equivalent to `(*win).gpuctx` (which dereferences win), in this case `win` is NULL because `GHOST_CreateWindow()` failed for whatever reason and `wm->windrawable` is NULL.

Either way, assuming this can still be reproduced on the latest official release, this should be reported upstream.
I can't reproduce it so there isn't much I personally can do about it. (unless some consistent reproducer is found)

Re: Blender crashes on startup

[oreo639]

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New comment by oreo639 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185773058

Comment:
`win->gpuctx` is equivalent to `(*win).gpuctx` (which dereferences win), in this case `win` is NULL because `GHOST_CreateWindow()` failed for whatever reason and `wm->windrawable` is NULL.

Either way, assuming this can still be reproduced on the latest official release, this should be reported upstream.
I can't reproduce it so there isn't much I personally can do about it.

Re: Blender crashes on startup

[oreo639]

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New comment by oreo639 on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185773058

Comment:
`win->gpuctx` is equivalent to `(*win).gpuctx` (which dereferences win), in this case `win` is NULL because `GHOST_CreateWindow()` failed for whatever reason and `wm->windrawable` is NULL.

Either way, assuming this can still be reproduced on the latest official release, this should be reported upstream.
Personally, I can't reproduce it so there isn't much I can do about it.

Re: Blender crashes on startup

[fruitiestPunch]

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New comment by fruitiestPunch on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185807040

Comment:
I think GHOST_CreateWindow fails in v4, because it uses 'gpuSettings' for the first time. Before it was 'glSettings'.
This would be in line with what @MechDR said about PCs without GPU Passthrough.
Since I have the same issue as @MechDR I can reproduce it and check, if I can still use 'gSettings', if 'gpuSettings' are not available.

Thanks for your help in locating the bug :D

Re: Blender crashes on startup

[fruitiestPunch]

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New comment by fruitiestPunch on void-packages repository

https://github.com/void-linux/void-packages/issues/49763#issuecomment-2185807040

Comment:
I think GHOST_CreateWindow fails in v4, because it uses 'gpuSettings' (https://github.com/blender/blender/blob/9be62e85b7270d3d2e5bcc846420b91bab3988f9/source/blender/windowmanager/intern/wm_window.cc#L734C7-L734C18) for the first time. Before it was 'glSettings' (https://github.com/blender/blender/blob/626a6b1c67997ac2432e91e836db5ed0f2dd8c64/source/blender/windowmanager/intern/wm_window.c#L692).
This would be in line with what @MechDR said about PCs without GPU Passthrough.
Since I have the same issue as @MechDR I can reproduce it and check, if I can still use 'gSettings', if 'gpuSettings' are not available.

Thanks for your help in locating the bug :D