rescue in <main>' 3: from /usr/local/Homebrew/Library/Homebrew/exceptions.rb:501:in
dump'
2: from /usr/local/Homebrew/Library/Homebrew/exceptions.rb:447:in issues' 1: from /usr/local/Homebrew/Library/Homebrew/exceptions.rb:451:in
fetch_issues'
/usr/local/Homebrew/Library/Homebrew/utils/github.rb:60:in issues_for_formula': undefined method
full_name' for nil:NilClass (NoMethodError)
As pointed out here https://github.com/jeffreywildman/homebrew-virt-manager/issues/142#issuecomment-813486873 virt-manager will not install. This corrects things.