Urgent bugfix: Control-Freak prevents PRs that span forks from merging on Bitbucket 6.0.0 or newer because of a java.lang.NoSuchMethodError: com.atlassian.bitbucket.scm.git.command.GitScmCommandBuilder.alternates(Ljava/lang/Iterable;)
Underlying cause: some core Bitbucket APIs went through some cleanup in 6.0.0 that unfortunately breaks Java bytecode reverse-compatibility (e.g., interface methods that were previously redundantly declared in both child and parent interfaces were removed from the child).
Thanks to Dennis Schumann for the bug report.
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