Xcode 12 Documentation window closes Xcode

When I try to open the Xcode Documentation inside Xcode 12 (downloaded from the app store), the whole app closes. Is anyone else seeing this
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snackdog
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Apple Recommended

This affects Xcode 12 when downloaded from the Mac App Store. We're aware of the problem and we're working on a fix.

As a workaround in the meantime, documentation is available on developer.apple.com, or if necessary, Xcode 12 can be downloaded from the More Downloads area. After the next Xcode update, re-download Xcode from the Mac App Store to enable automatic updates, with smaller download sizes.
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Technology Evangelist
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I got a crash alert this time:

Process: Xcode [640]
Path: /Applications/Xcode.app/Contents/MacOS/Xcode
Identifier: Xcode
Version: 12.0 (17219)
Build Info: IDEFrameworks-17219000000000000~2 (12A7209)
App Item ID: 497799835
App External ID: 837639917
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Xcode [640]
User ID: 501

Date/Time: 2020-09-16 22:20:44.591 -0400
OS Version: Mac OS X 10.15.6 (19G2021)
Report Version: 12
Bridge OS Version: 4.6 (17P6610)
Anonymous UUID: 4D506980-D44E-C830-B925-72776DDD6EF3


Time Awake Since Boot: 130 seconds

System Integrity Protection: enabled

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

Exception Type: EXCCRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXCCORPSENOTIFY

Application Specific Information:
Sending windowMenushowDocumentation: to IDEDocCommandHandler from <NSMenuItem: 0x7fb70cf1af50 Developer Documentation>
ProductBuildVersion: 12A7209
ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/IDEPlugins/IDEPlugins-17192/IDEDocViewer/DocumentationNavigator.swift:142
Details:
Function: explorableSource(for:)
Thread: <NSThread: 0x7fb707407220>{number = 1, name = main}
Open FDs: 45/7168
Posted by
snackdog
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Same thing here. Opening documentation viewer crashes Xcode. Beta 6 is fine.
Posted by
Wevah
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I got the same issue, and my Xcode is a release version...
Posted by
jinsongpei_sh
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Xcode Version 12.0 (12A7209) --> The GM version Download from developer.apple.com/download works fine.

Xcode Version 12.0 (12A7208) --> App Store version, failed.
Posted by
nbjyo
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Yes I'm also having same issue on two different mac. One running Big Sur and another Catalina.
Posted by
jigar1234567
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Same issue here running Xcode Version 12.0 (12A7209), updated from Mac App Store on Catalina 10.15.6.
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klm001
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Upgraded on second MacBook Pro to Xcode Version 12.0 (12A7209) from Mac App Store on Catalina 10.15.6 — same issue as on first: Xcode crashes when selecting Developer Documentation from the Window menu. No project needs to be open to reproduce the crash.

Code Block 
Process:               Xcode [8654]
Path:                  /Applications/Xcode.app/Contents/MacOS/Xcode
Identifier:            com.apple.dt.Xcode
Version:               12.0 (17219)
Build Info:            IDEFrameworks-17219000000000000~2 (12A7209)
App Item ID:           497799835
App External ID:       837639917
Code Type:             X86-64 (Native)
Parent Process:        ??? [1]
Responsible:           Xcode [8654]
User ID:               501
Date/Time:             2020-09-17 11:09:25.530 -0400
OS Version:            Mac OS X 10.15.6 (19G2021)
Report Version:        12
Bridge OS Version:     4.6 (17P6610)
Time Awake Since Boot: 16000 seconds
Time Since Wake:       5600 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:
Sending windowMenu_showDocumentation: to IDEDocCommandHandler from <NSMenuItem: 0x7f98b64de490 Developer Documentation>
ProductBuildVersion: 12A7209
ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/IDEPlugins/IDEPlugins-17192/IDEDocViewer/DocumentationNavigator.swift:142
Details:  
Function: explorableSource(for:)
Thread:   <NSThread: 0x7f98f55077c0>{number = 1, name = main}
Open FDs: 42/7168





Posted by
klm001
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I'm seeing it too with the Appstore version 12A709.

I have reported it to Apple via the feedback form. Suggest other people do too.
Posted by
jeremyp
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Same situation here. Opening the documentation window crashes the IDE.

  • Using Xcode 12.0 (12A7209) AppStore.

  • Running on Big Sur Public Beta 6 (20A5364e)

Posted by
rodmaz
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No issue here (with version 12A7208).

I note others here have version 12A7209…
Posted by
Claude31
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This seems to be affecting the App Store version only. I had the GM (209) installed from before, and the documentation viewer works fine there. It also seems to be fine in the recently released Xcode 12.2 Beta 1.
Posted by
josh112
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Me too. Version 12.0 (12A7209). Delete and reinstall of Xcode did not help.
Posted by
TallBassett
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same here…… so sad
Posted by
yangsf
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@josh112 — This seems to be affecting the App Store version only. I had the GM (209) installed from before, and the documentation viewer works fine there.

Many of the issues reported in this topic are against the same version, 12A7209, so it might not be related to the delivery method (App Store).

Has anyone tried uninstalling the failing version and reinstalling from the GM instead of from the App Store?
Posted by
klm001
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I had this problem and tested it... Xcode build 12A7209 from the App Store crashes whenever I open the documentation browser. Xcode build 12A7208 from the download 'Xcode_12_GM_seed.xip' works fine. Just throw this on the pile of problems with the App Store I guess =)

Because the downloads section is kind of hidden, here's how to find it: On the developer site go to your account, choose 'Downloads' from the sidebar, then look under the top navigation bar on the downloads page and there is a tiny 'More' link in the top left (next to 'Beta' and 'Release'.) Click 'More' and you'll get the real list of downloads.
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Gerrit
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