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Yes, tried that and the Version 11.3 beta (11C24b), also update Catalina to 10.15.2 Beta (19C46a).I opened at DTS inciident and they were no help.Using a different Catalina user account did not help but creating a new APFS volume, installing Mohave there with latest GM Xcode, (slack, github etc) then Shutdown and reboot into that to use Xcode lets me build again.
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Tried this - did not fix for me.....
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I have a similar issue. Since Catalina my main project crashes Xcode on opening.I created a clean install thumbdrive of Catalina and it reproduces there.I created a clean install of Mojave and there it runs no problem in the current 11.2.1 version of Xcode.I've deleted the xcuserdata as above and tried to delete all xcode prefs on the machine. Odd thing is that I work with another dev and he is on Catalina and does not have the issue. He installed on another machine and there again it did not crash. Really strange. I am stumpted.
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``I did this, and everything else I can find and I still have the problem. I try to open a project and Xcode crashes:Release Xcode and Catalina 10.15.1 (19B88)```Process: Xcode [1420]Path: /Applications/Xcode.app/Contents/MacOS/XcodeIdentifier: com.apple.dt.XcodeVersion: 11.1 (15405)Build Info: IDEFrameworks-15405000000000000~13 (11A1027)App Item ID: 497799835App External ID: 832925179Code Type: X86-64 (Native)Parent Process: ??? [1]Responsible: Xcode [1420]User ID: 504Date/Time: 2019-10-28 15:25:24.591 -0700OS Version: Mac OS X 10.15 (19A603)Report Version: 12Bridge OS Version: 4.0 (17P572)Anonymous UUID: 6CD43C5C-E2EE-E98D-4A82-7A3A1ECCF1A7Sleep/Wake UUID: FE029137-058E-4477-9815-E8298C811884Time Awake Since Boot: 2600 secondsTime Since Wake: 1300 secondsSystem Integrity Protection: enabledCrashed Thread: 10 Dispatch queue: IDEFolder Filetype Preheating work queueException Type: EXC_CRASH (SIGABRT)Exception Codes: 0x0000000000000000, 0x0000000000000000Exception Note: EXC_CORPSE_NOTIFYApplication Specific Information:ProductBuildVersion: 11A1027ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/DVTFrameworks/DVTFrameworks-15403/DVTFoundation/FileTypes/DVTFileDataType.mm:156Details: Assertion failed: identCStr && identCStr[0]Function: DVTPrimitiveFileDataType *_DVTGetPrimitiveFileDataTypeForIdentifierCStr_unlocked(const char *)Thread: <NSThread: 0x7fcc40b54d20>{number = 17, name = (null)}Hints:
