Xcode will no longer open project - xcode

Xcode won't open a project workspace. It immediately quits and throws this error report. Everything was fine on my last commit. I'm not sure how go about finding the issue. It says Assertion failed: _numberOfTabsForLayout > 1 I don't have any type of tab bar in this project but I did close the project with multiple tabs open in the workspace.
Process: Xcode [8382]
Path: /Applications/Xcode.app/Contents/MacOS/Xcode
Identifier: com.apple.dt.Xcode
Version: 6.4 (7720)
Build Info: IDEFrameworks-7720000000000000~8
App Item ID: 497799835
App External ID: 812725084
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Xcode [8382]
User ID: 501
Date/Time: 2015-10-18 20:06:46.433 -0400
OS Version: Mac OS X 10.11 (15A284)
Report Version: 11
Anonymous UUID: 2C67D893-30CC-08A5-E12A-E03DD1BAEFBD
Sleep/Wake UUID: 844DC3EB-F2C2-496A-BEEB-C72AE1AFE3F9
Time Awake Since Boot: 48000 seconds
Time Since Wake: 5800 seconds
System Integrity Protection: enabled
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
Application Specific Information:
ProductBuildVersion: 6E35b
ASSERTION FAILURE in /SourceCache/DVTFrameworks/DVTFrameworks-7714/DVTKit/Tabs/DVTScrollableTabBarView.m:1270
Details: Assertion failed: _numberOfTabsForLayout > 1
Object: <DVTScrollableTabBarView: 0x7fd3dfa81230>
Method: -_calculateStackingRegions
Thread: <NSThread: 0x7fd3da5207f0>{number = 1, name = main}
Hints: None
Backtrace:
0 0x0000000103b8cfda -[IDEAssertionHandler handleFailureInMethod:object:fileName:lineNumber:assertionSignature:messageFormat:arguments:] (in IDEKit)
Update: I figured out how to get it to open but not how to resolve the problem. If I disconnect my second monitor it will open and work just fine. I can reconnect the monitor once it's open and everything is fine. But each time I need to reopen the project I have to pull the HDMI cable out.

Related

XCode 10.2.1 crashes while trying to open (xcode quits unexpectedly while using the libMainThreadChecker.dylib plug-in)

When I try to open Xcode, it crashes unexpectedly and asks me to reopen. But reopening also gives me the same error. I have XCode 10.2.1 as well as XCode 11.7 installed.
Problem details and system configuration:
Process: Xcode [1607]
Path: /Applications/Xcode1.app/Contents/MacOS/Xcode
Identifier: com.apple.dt.Xcode
Version: 10.2.1 (14490.122)
Build Info: IDEFrameworks-14490122000000000~6 (10E1001)
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Xcode [1607]
User ID: 501
PlugIn Path: /Applications/Xcode1.app/Contents/Developer/usr/lib/libMainThreadChecker.dylib
PlugIn Identifier: libMainThreadChecker.dylib
PlugIn Version: ??? (64490.34)
Date/Time: 2020-11-16 21:23:39.623 -0500
OS Version: macOS 11.0.1 (20B29)
Report Version: 12
Bridge OS Version: 5.0.1 (18P2561)
Anonymous UUID: 14ACF447-0D96-DDDB-DD2C-2FE0B3DB664D
Time Awake Since Boot: 4800 seconds
System Integrity Protection: enabled
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x00007fff237919b9
Exception Note: EXC_CORPSE_NOTIFY
Termination Signal: Bus error: 10
Termination Reason: Namespace SIGNAL, Code 0xa
Terminating Process: exc handler [1607]
VM Regions Near 0x7fff237919b9:
__TEXT 7fff22bf8000-7fff23600000 [ 10.0M] r-x/r-x SM=COW /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
--> __TEXT 7fff23600000-7fff23800000 [ 2048K] r-x/rwx SM=COW /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
Submap 7fff23800000-7fff40000000 [456.0M] r--/rwx SM=PRV process-only VM submap
Application-Specific Information:
/Applications/Xcode1.app/Contents/Developer/usr/lib/libMainThreadChecker.dylib
ProductBuildVersion: 10E1001
Faced the same issue on Big Sur update. Git stopped working as well. Fixed it by running following command in terminal.
defaults write com.apple.dt.Xcode DVTDisableMainThreadChecker 1
Original Answer Reference: https://developer.apple.com/forums/thread/651985?answerId=637934022#637934022
Faced the same issue after updating to Big Sur.
Found a temporary workaround:
Go to Xcode10.app/Contents/Developer/usr/lib
Rename the file libMainThreadChecker.dylib into anything else (I named it _libMainThreadChecker.dylib)
NOTE: If your project has "Main thread checker enabled" it may crash somewhere, so it's better to disable it.
This is a known issues
Currently there is one workaround for this.
You've to run the following command in the Terminal app to avoid crashes when starting Xcode:
defaults write com.apple.dt.Xcode DVTDisableMainThreadChecker 1
Now deactivate "Main Thread Checker" in your Xcode project: Edit
Scheme -> Run/Test -> Diagnostics -> Uncheck Main Thread Checker.

Xcode 10.3 does not work on MacOS Big Sur 11.0.1 (non beta)

I have tried to format my MacOS, redownload Xcode 10.3. It just doesnt work.
Logs:
Process: Xcode [22467]
Path: /Users/USER/Downloads/Xcode_10.3.app/Contents/MacOS/Xcode
Identifier: com.apple.dt.Xcode
Version: 10.3 (14492.2)
Build Info: IDEFrameworks-14492002000000000~2 (10G8)
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Xcode [22467]
User ID: 501
PlugIn Path: /Users/USER/Downloads/Xcode_10.3.app/Contents/Developer/usr/lib/libMainThreadChecker.dylib
PlugIn Identifier: libMainThreadChecker.dylib
PlugIn Version: ??? (64492.1)
Date/Time: 2020-11-13 16:52:33.909 +0800
OS Version: macOS 11.0.1 (20B29)
Report Version: 12
Bridge OS Version: 3.0 (14Y908)
Anonymous UUID: 46BBB97A-6E02-4B36-B8CE-640575A752F0
Time Awake Since Boot: 4500 seconds
System Integrity Protection: enabled
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x00007fff2379c9b9
Exception Note: EXC_CORPSE_NOTIFY
Termination Signal: Bus error: 10
Termination Reason: Namespace SIGNAL, Code 0xa
Terminating Process: exc handler [22467]
VM Regions Near 0x7fff2379c9b9:
__TEXT 7fff22c03000-7fff23600000 [ 10.0M] r-x/r-x SM=COW /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
--> __TEXT 7fff23600000-7fff23800000 [ 2048K] r-x/rwx SM=PRV /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
Submap 7fff23800000-7fff40000000 [456.0M] r--/rwx SM=PRV process-only VM submap
Application Specific Information:
/Users/junjie/Downloads/Xcode_10.3.app/Contents/Developer/usr/lib/libMainThreadChecker.dylib
ProductBuildVersion: 10G8
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libMainThreadChecker.dylib 0x00000001176b8069 swizzleImplementationFast + 115
1 libMainThreadChecker.dylib 0x00000001176b7ef0 addSwizzler + 165
2 libMainThreadChecker.dylib 0x00000001176b7aec __library_initializer + 2937
3 dyld 0x0000000117b21df5 ImageLoaderMachO::doImageInit(ImageLoader::LinkContext const&) + 321
4 dyld 0x0000000117b2246d ImageLoaderMachO::doInitialization(ImageLoader::LinkContext const&) +
Any suggestion or idea how to resolve this?
Ok I managed to get it up and running by deleting ~/Downloads/Xcode_10.3.app/Contents/Developer/usr/lib/libMainThreadChecker.dylib
It compiles my project.
To be safe, I have copied this same dylib file from latest Xcode 12.2 and put into that folder. It is still working so far.
I had the same problem, I initially solved it using defaults write com.apple.dt.Xcode DVTDisableMainThreadChecker 1. After this, Xcode 10 seemed to work on macOS 11, and everything would build from within Xcode.
I then had the weirdest issue - when compiling from the command line using xcodebuild, the whole machine would grind to a halt and eventually hang, requiring a "hold down the power button" restart. The problem turned out to be that ibtool (used for compiling IB files) was not honouring DVTDisableMainThreadChecker, and was still crashing. This was somehow causing the machine to get into a state where it stopped responding.
The solution was to copy libMainThreadChecker.dylib from Xcode 12 into the Xcode 10 package. After that the problem went away.

Xcode not working - how do I fix it?

I am getting this error:
Xcode was unexpectedly truncated.
Error detail:
Process: Xcode [638]
Path: /Applications/Xcode.app/Contents/MacOS/Xcode
Identifier: com.apple.dt.Xcode
Version: 9.0.1 (13249)
Build Info: IDEFrameworks-13249000000000000~2
App Item ID: 497799835
App External ID: 823984564
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Xcode [638]
User ID: 501
Date/Time: 2017-10-19 10:45:48.831 +0300
OS Version: Mac OS X 10.12.6 (16G29)
Report Version: 12
Anonymous UUID: FE2DA13F-B64C-DC82-FF55-0BE0D61794A9
Time Awake Since Boot: 940 seconds
System Integrity Protection: enabled
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
To uninstall xcode just drag the xcode icon to the trash. Then you can reinstall it from the developers platform or through the regular download in the appstore.
i ran the package
/Applications/Xcode.app/Contents/Resources/Packages/XcodeSystemResources.pkg.
And the Xcode 9 started to work.

XCode 8.2 Crash on stop debug

I use XCode 8.2.1 to debug my app. Every time when click the stop debug button, The XCode will crash. This is the following crash info:
Process: Xcode [1478]
Path: /Applications/Xcode.app/Contents/MacOS/Xcode
Identifier: com.apple.dt.Xcode
Version: 8.2.1 (11766.1)
Build Info: IDEFrameworks-11766001000000000~5
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Xcode [1478]
User ID: 501
Date/Time: 2017-01-06 16:24:45.369 +0800
OS Version: Mac OS X 10.11.6 (15G1212)
Report Version: 11
Anonymous UUID: A7D6D50D-A3D3-32EF-A3FC-160E5195E461
Time Awake Since Boot: 3000 seconds
System Integrity Protection: enabled
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
Does anyone has the same issue?
There was a race condition bug in lldb that was fixed very recently - should show up in the next official tools release - that could cause debugger shutdown crashes. Without seeing the crashed thread though, it's hard to tell whether it was likely one of these crashes.

Xcode quit unexpectedly when opening my project

I tried to delete the 2 files in the projects package content and if I do that my project works but when I click on any file it quits again
log:
Process: Xcode [515]
Path: /Applications/Xcode.app/Contents/MacOS/Xcode
Identifier: com.apple.dt.Xcode
Version: 6.4 (7720)
Build Info: IDEFrameworks-7720000000000000~8
App Item ID: 497799835
App External ID: 812725084
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Xcode [515]
User ID: 501
Date/Time: 2015-08-04 12:34:07.199 +0300
OS Version: Mac OS X 10.10.4 (14E46)
Report Version: 11
Anonymous UUID: 93354AAB-2902-3F8B-27E6-05F9AFC1C64D
Time Awake Since Boot: 580 seconds
Crashed Thread: 14 Dispatch queue: IBPlatformToolRequestQueue.IBCocoaTouchFramework-EightAndLater
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Whenever this has happened to me, i keep Xcode closed and delete DerivedData folder. This is located at /Users/username/Library/Developer/Xcode/DerivedData
Deleting Derived data and clearing cache helps
you can clear derived data by pressing CMD+, in xcode and select locations then click the little gray arrow beneath Derived data and select the derived data folder and just select and trash
You can clear cache by pressing CMD+k

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