undefined method `to_tree_hash' for nil:NilClass (NoMethodError)

[igorkulman]

I got this error running 0.7.1 installed from brew

❯ kintsugi Sources/iOSSampleApp.xcodeproj/project.pbxproj
Traceback (most recent call last):
	16: from /Users/igorkulman/.rbenv/versions/2.7.7/bin/kintsugi:23:in `<main>'
	15: from /Users/igorkulman/.rbenv/versions/2.7.7/bin/kintsugi:23:in `load'
	14: from /Users/igorkulman/.rbenv/versions/2.7.7/lib/ruby/gems/2.7.0/gems/kintsugi-0.7.1/bin/kintsugi:10:in `<top (required)>'
	13: from /Users/igorkulman/.rbenv/versions/2.7.7/lib/ruby/gems/2.7.0/gems/kintsugi-0.7.1/lib/kintsugi.rb:26:in `run'
	12: from /Users/igorkulman/.rbenv/versions/2.7.7/lib/ruby/gems/2.7.0/gems/kintsugi-0.7.1/lib/kintsugi/cli.rb:207:in `block in create_root_command'
	11: from /Users/igorkulman/.rbenv/versions/2.7.7/lib/ruby/gems/2.7.0/gems/kintsugi-0.7.1/lib/kintsugi/merge.rb:39:in `resolve_conflicts'
	10: from /Users/igorkulman/.rbenv/versions/2.7.7/lib/ruby/gems/2.7.0/gems/xcodeproj-1.22.0/lib/xcodeproj/differ.rb:65:in `project_diff'
	 9: from /Users/igorkulman/.rbenv/versions/2.7.7/lib/ruby/gems/2.7.0/gems/xcodeproj-1.22.0/lib/xcodeproj/project.rb:328:in `to_tree_hash'
	 8: from /Users/igorkulman/.rbenv/versions/2.7.7/lib/ruby/gems/2.7.0/gems/xcodeproj-1.22.0/lib/xcodeproj/project/object.rb:452:in `to_tree_hash'
	 7: from /Users/igorkulman/.rbenv/versions/2.7.7/lib/ruby/gems/2.7.0/gems/xcodeproj-1.22.0/lib/xcodeproj/project/object.rb:452:in `each'
	 6: from /Users/igorkulman/.rbenv/versions/2.7.7/lib/ruby/gems/2.7.0/gems/xcodeproj-1.22.0/lib/xcodeproj/project/object.rb:454:in `block in to_tree_hash'
	 5: from /Users/igorkulman/.rbenv/versions/2.7.7/lib/ruby/gems/2.7.0/gems/xcodeproj-1.22.0/lib/xcodeproj/project/object.rb:454:in `map'
	 4: from /Users/igorkulman/.rbenv/versions/2.7.7/lib/ruby/gems/2.7.0/gems/xcodeproj-1.22.0/lib/xcodeproj/project/object.rb:452:in `to_tree_hash'
	 3: from /Users/igorkulman/.rbenv/versions/2.7.7/lib/ruby/gems/2.7.0/gems/xcodeproj-1.22.0/lib/xcodeproj/project/object.rb:452:in `each'
	 2: from /Users/igorkulman/.rbenv/versions/2.7.7/lib/ruby/gems/2.7.0/gems/xcodeproj-1.22.0/lib/xcodeproj/project/object.rb:454:in `block in to_tree_hash'
	 1: from /Users/igorkulman/.rbenv/versions/2.7.7/lib/ruby/gems/2.7.0/gems/xcodeproj-1.22.0/lib/xcodeproj/project/object.rb:454:in `map'
/Users/igorkulman/.rbenv/versions/2.7.7/lib/ruby/gems/2.7.0/gems/xcodeproj-1.22.0/lib/xcodeproj/project/object/target_dependency.rb:83:in `to_tree_hash': undefined method `to_tree_hash' for nil:NilClass (NoMethodError)

attaching the conflicted project file

project.pbxproj.zip

[byohay]

Hey! The crash happened in https://github.com/CocoaPods/Xcodeproj, when trying to calculate the project diff.
I found out that it's code I introduced back in 2020, so I fixed it here 😄