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Hi,Environment: System Version: macOS 10.15.4 (19E266) Kernel Version: Darwin 19.4.0 Xcode 11.4.1 Build version 11E503aI have 6 simulators constantly running on a mac pro for a few days, and I started to notice the xcode instances started to crash (exit with -9) constantly after seeing the following system errors:2020-05-25 00:01:26.462192-0700 0x220b500 Default 0x0 0 0 kernel: (AppleFSCompressionTypeZlib) /AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/AppleFSCompression_kexts/AppleFSCompression-119.100.1/Common/ChunkCompression.cpp:666: /Applications/Xcode11.4.1.app/Contents/Frameworks/libclang.dylib: lzvn decode failed2020-05-25 00:01:26.462272-0700 0x220b500 Default 0x0 0 0 kernel: decmpfs.c:1455:decmpfs_pagein_compressed: /Applications/Xcode11.4.1.app/Contents/Frameworks/libclang.dylib: err 222020-05-25 00:01:26.462318-0700 0x220b500 Default 0x0 0 0 kernel: (apfs) apfs_pagein:9266: faking zero data for ino 12995419730 (offset 0 xsize 1048576)2020-05-25 00:01:26.462272-0700 0x220b500 Default 0x0 0 0 kernel: decmpfs.c:1455:decmpfs_pagein_compressed: /Applications/Xcode11.4.1.app/Contents/Frameworks/libclang.dylib: err 222020-05-25 00:01:26.462318-0700 0x220b500 Default 0x0 0 0 kernel: (apfs) apfs_pagein:9266: faking zero data for ino 12995419730 (offset 0 xsize 1048576)2020-05-25 00:01:26.486945-0700 0x220b500 Default 0x0 0 0 kernel: (AppleFSCompressionTypeZlib) /AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/AppleFSCompression_kexts/AppleFSCompression-119.100.1/Common/ChunkCompression.cpp:666: /Applications/Xcode11.4.1.app/Contents/Frameworks/libclang.dylib: lzvn decode failed2020-05-25 00:01:26.487014-0700 0x220b500 Default 0x0 0 0 kernel: decmpfs.c:1455:decmpfs_pagein_compressed: /Applications/Xcode11.4.1.app/Contents/Frameworks/libclang.dylib: err 222020-05-25 00:01:26.487059-0700 0x220b500 Default 0x0 0 0 kernel: (apfs) apfs_pagein:9266: faking zero data for ino 12995419730 (offset 0 xsize 1048576)Somehow this triggered the xcode into a bad state and crash loop. Rebooting the host solved the issue, but I'm curious if this is a known bug or if there's a good turnaround other than rebooting the host.Thanks.

I'm building CI workflows to run tests on simulators. From XCode 11's release note:"For headless and continuous integration scenarios, you can configure CoreSimulator to skip compositing operations in the virtual frame buffer by setting defaults write com.apple.CoreSimulator FramebufferServerRendererPolicy to none. In this mode simulators can’t be viewed and simctl io is unable to take screenshots or record videos. (48264341)"I did "defaults write com.apple.CoreSimulator FramebufferServerRendererPolicy none" and verified "defaults read com.apple.CoreSimulator FramebufferServerRendererPolicy" shows "none".But I'm still able to see the simulator instance and run `simctl io` commands. Plus I don't see any performance improvement (e.g cpu, memory) by setting it. So I suspect the `FramebufferServerRendererPolicy` is not respected?Anyone has some idea about this?