- builder.rb: correctly handle ...
forwarding to super with explicit block
#1049
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Closes #1004
Upstream commit ruby/ruby@a850cd1 is specific to 3.3, previous versions already did not allow this.
See https://bugs.ruby-lang.org/issues/20392 for a bit more info.
But since the super node has has a different shape, it behaved unexpectedly in earlier ruby versions already.
It allowed forwarding with zero and one arguments and failed for more. Now it correctly rejects as invalid syntax, except in Ruby 3.3, that fix has not been backported.