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 testy (locale = 'en_US.utf8', version = 'foo'); -- fail, no versions for libc

ERROR: collation "testy" has no actual version, but a version was specified

CREATE COLLATION test4 FROM nonsense;

ERROR: collation "nonsense" for encoding "UTF8" does not exist

CREATE COLLATION test5 FROM test0;

$$;

CREATE COLLATION test3 (lc_collate='en_US.utf8');-- fail, need lc_ctype

CREATE COLLATION testx (locale='nonsense');-- fail

CREATE COLLATION testy (locale='en_US.utf8', version='foo');-- fail, no versions for libc

CREATE COLLATION test4FROM nonsense;

CREATE COLLATION test5FROM test0;