End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →
class method
Psych::TreeBuilder.new
new
ext/psych/lib/psych/tree_builder.rb
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# File tmp/rubies/ruby-3.1.3/ext/psych/lib/psych/tree_builder.rb, line 22
def initialize
@stack = []
@last = nil
@root = nil
@start_line = nil
@start_column = nil
@end_line = nil
@end_column = nil
end
Create a new TreeBuilder instance