FailedAssertion("!OidIsValid(def->collOid)", File: "view.c", Line: 89)

Hi everyone,

The following statements result in an assertion error on the latest
trunk version (c01ac6d):

CREATE TABLE t0(c0 TEXT COLLATE "POSIX");
CREATE VIEW v0(c0) AS (SELECT (t0.c0 COLLATE "C")::INT FROM t0); --
FailedAssertion("!OidIsValid(def->collOid)", File: "view.c", Line: 89)

When building without assertions, the CREATE VIEW statement results in
an error instead:

ERROR: collations are not supported by type integer

Best,
Manuel

Full stack trace:

TRAP: FailedAssertion("!OidIsValid(def->collOid)", File: "view.c", Line: 89)
postgres: postgres testdb [local] CREATE
VIEW(ExceptionalCondition+0x76)[0x563c55747066]
postgres: postgres testdb [local] CREATE VIEW(DefineView+0x4cb)[0x563c55487cdb]
postgres: postgres testdb [local] CREATE VIEW(+0x41cebc)[0x563c5561febc]
postgres: postgres testdb [local] CREATE
VIEW(standard_ProcessUtility+0x148)[0x563c5561e9f8]
postgres: postgres testdb [local] CREATE VIEW(+0x418a64)[0x563c5561ba64]
postgres: postgres testdb [local] CREATE VIEW(+0x41961b)[0x563c5561c61b]
postgres: postgres testdb [local] CREATE VIEW(PortalRun+0x17a)[0x563c5561d45a]
postgres: postgres testdb [local] CREATE VIEW(+0x415fed)[0x563c55618fed]
postgres: postgres testdb [local] CREATE
VIEW(PostgresMain+0x14ef)[0x563c5561a8cf]
postgres: postgres testdb [local] CREATE VIEW(+0x38d8d4)[0x563c555908d4]
postgres: postgres testdb [local] CREATE
VIEW(PostmasterMain+0xe01)[0x563c555917f1]
postgres: postgres testdb [local] CREATE VIEW(main+0x4b8)[0x563c552b9058]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb)[0x7f80170ddb6b]
postgres: postgres testdb [local] CREATE VIEW(_start+0x2a)[0x563c552b90fa]