I think this change neglected to add plpgsql to the extension dependencies in the .control file:
12:53:51 # Failed test 'psql -qc 'CREATE EXTENSION "cube"'' 12:53:51 # at t/TestLib.pm line 213. 12:53:51 not ok 68 - psql -qc 'CREATE EXTENSION "cube"' 12:53:51 # got: '1' 12:53:51 # expected: '0' 12:53:51 not ok 69 - extension cube installs without error 12:53:51 # Failed test 'extension cube installs without error' 12:53:51 # at t/TestLib.pm line 214. 12:53:51 # got: 'ERROR: language "plpgsql" does not exist 12:53:51 # HINT: Use CREATE EXTENSION to load the language into the database. 12:53:51 # ' (The Debian regression tests remove plpgsql before testing all extensions in turn.) Christoph