Cocoapods: RuntimeError - [Xcodeproj] Unknown object version.

[LemonSpike]

• [x] I've read and understood the CONTRIBUTING guidelines and have done my best effort to follow.

Command

/usr/local/bin/pod update Firebase/Crashlytics Firebase/Analytics

Report

• What did you do?
  pod update for two pods

• What did you expect to happen?
  Update pods

• What happened instead?
  Got an error message and failed update.

Stack

   CocoaPods : 1.9.3
        Ruby : ruby 2.6.3p62 (2019-04-16 revision 67580) [universal.x86_64-darwin19]
    RubyGems : 3.0.3
        Host : Mac OS X 10.15.7 (19H2)
       Xcode : 12.0.1 (12A7300)
         Git : git version 2.24.3 (Apple Git-128)
Ruby lib dir : /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib
Repositories : master - git - https://github.com/CocoaPods/Specs.git @ 8cc64318f1f173e19caa133637927fc3da01b6b7

Plugins

cocoapods-deintegrate : 1.0.4
cocoapods-plugins     : 1.0.0
cocoapods-search      : 1.0.0
cocoapods-stats       : 1.1.0
cocoapods-trunk       : 1.5.0
cocoapods-try         : 1.2.0

Podfile

platform :ios, '8.0'
inhibit_all_warnings!
use_frameworks!
source 'https://github.com/CocoaPods/Specs.git'
# source 'https://cdn.cocoapods.org/'

abstract_target 'pods' do
    pod 'MBProgressHUD'
    pod 'UbiquityStoreManager'
    pod 'libPhoneNumber-iOS'
    pod 'ActionSheetPicker-3.0'
    pod 'Reachability'
    pod 'AFNetworking', '2.6.3'
    pod 'TTTAttributedLabel'
  pod 'Flurry-iOS-SDK/FlurrySDK'

    pod 'Firebase/Analytics'
    pod 'Firebase/Crashlytics'

    target 'MyHealthGuide' do
    end

    target 'TestMyHealthGuide' do
    end
end

Error

RuntimeError - [Xcodeproj] Unknown object version.
/Library/Ruby/Gems/2.6.0/gems/xcodeproj-1.16.0/lib/xcodeproj/project.rb:227:in `initialize_from_file'
/Library/Ruby/Gems/2.6.0/gems/xcodeproj-1.16.0/lib/xcodeproj/project.rb:112:in `open'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer/analyzer.rb:1177:in `block (2 levels) in inspect_targets_to_integrate'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer/analyzer.rb:1176:in `each'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer/analyzer.rb:1176:in `block in inspect_targets_to_integrate'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/user_interface.rb:64:in `section'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer/analyzer.rb:1171:in `inspect_targets_to_integrate'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer/analyzer.rb:106:in `analyze'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer.rb:410:in `analyze'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer.rb:235:in `block in resolve_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/user_interface.rb:64:in `section'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer.rb:234:in `resolve_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer.rb:156:in `install!'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/command/update.rb:63:in `run'
/Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:334:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/command.rb:52:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/bin/pod:55:in `<top (required)>'
/usr/local/bin/pod:23:in `load'
/usr/local/bin/pod:23:in `<main>'

[!] [!] Xcodeproj doesn't know about the following attributes {"alwaysOutOfDate"=>"1"} for the 'PBXShellScriptBuildPhase' isa.
If this attribute was generated by Xcode please file an issue: https://github.com/CocoaPods/Xcodeproj/issues/new

[LemonSpike]

There's a CocoaPods bug in the latest Xcode 12, where you can set an option for the Run Script Build Phase to Based on Dependency Analysis. Reverting that to the default selected state worked for pod install although unselecting this option should probably not cause CocoaPods errors.

[dnkoutso]

The crash can be fixed by gem update xcodeproj as the new xcodeproj gem knows about the new Xcode 12 project structure.

As fas this is concerned:

[!] [!] Xcodeproj doesn't know about the following attributes {"alwaysOutOfDate"=>"1"} for the 'PBXShellScriptBuildPhase' isa.
If this attribute was generated by Xcode please file an issue: https://github.com/CocoaPods/Xcodeproj/issues/new

Its filed here https://github.com/CocoaPods/Xcodeproj/issues/785 and its a warning.

Going to close for now as i believe this is already fixed and the other issue is filed.