ERROR: parameter "lc_ctype" must be specified
CREATE COLLATION testx (locale = 'nonsense'); -- fail
ERROR: could not create locale "nonsense": No such file or directory
+DETAIL: The operating system could not find any locale data for the locale name "nonsense".
CREATE COLLATION test4 FROM nonsense;
ERROR: collation "nonsense" for encoding "UTF8" does not exist
CREATE COLLATION test5 FROM test0;