SIGSEGV on demo_app quit after wgpu 22.0.0 update

[trevyn]

Describe the bug
egui_demo_app crashes on quit with EXC_BAD_ACCESS (SIGSEGV) after wgpu 22.0.0 update (#4847)

To Reproduce
Steps to reproduce the behavior:

1. checkout egui master
2. cargo run
3. close demo app window or command-Q

Expected behavior
Clean quit

Screenshots

Desktop (please complete the following information):

• OS: macOS 12.7.5 (21H1222)

Additional context
Works fine on commit b2d74ea, just before the wgpu update commit.

Process:               egui_demo_app [17052]
Path:                  /Users/USER/Documents/*/egui_demo_app
Identifier:            egui_demo_app
Version:               ???
Code Type:             ARM-64 (Native)
Parent Process:        zsh [10718]
Responsible:           Electron [10688]
User ID:               501

Date/Time:             2024-07-26 07:44:53.4393 +0400
OS Version:            macOS 12.7.5 (21H1222)
Report Version:        12

Time Awake Since Boot: 61000 seconds
Time Since Wake:       549 seconds

System Integrity Protection: enabled

Crashed Thread:        0  main  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000010
Exception Codes:       0x0000000000000001, 0x0000000000000010
Exception Note:        EXC_CORPSE_NOTIFY

Termination Reason:    Namespace SIGNAL, Code 11 Segmentation fault: 11
Terminating Process:   exc handler [17052]

VM Region Info: 0x10 is not in any region.  Bytes before following region: 68719476720
      REGION TYPE                    START - END         [ VSIZE] PRT/MAX SHRMOD  REGION DETAIL
      UNUSED SPACE AT START
--->  
      commpage (reserved)        1000000000-7000000000   [384.0G] ---/--- SM=NUL  ...(unallocated)

Thread 0 Crashed:: main Dispatch queue: com.apple.main-thread
0   egui_demo_app                 	       0x102bd7258 alloc::sync::Arc$LT$T$C$A$GT$::drop_slow::ha4f3f5b38712d026 + 28
1   egui_demo_app                 	       0x102bdc25c wgpu_core::device::any_device::AnyDevice::new::drop_glue::h3de37e88b3431ce7 + 48
...

[trevyn]

@Wumpf

[Wumpf]

Thanks for reporting! Repros cleanly on my mac as well, haven't checked if backend / platform is relevant here, likely not important.
Happens apparently whenever the surface is dropped after the device. Workaround and issue (huh or maybe even fix in wgpu, seems trivial) coming.

[Wumpf]

well, this was fun. Details see above linked PRs