[BUGS] BUG #14867: Cascade drop type error

The following bug has been logged on the website:

Bug reference:      14867
Logged by:          Mansur Galiev
Email address:      gomer94@yandex.ru
PostgreSQL version: 10.0
Operating system:   Ubuntu 16.04.3 LTS x64
Description:

CREATE TYPE my_type AS (f1 integer);
CREATE TYPE my_type_2 AS (f2 my_type);
CREATE TABLE my_table (c1 my_type_2);
CREATE VIEW my_view AS SELECT ((C1).f2).f1 FROM my_table;
DROP TYPE my_type CASCADE;

after then my_view still has a column and a type queries of this:

SELECT * FROM pg_views;

shows:

ERROR:  could not open relation with OID 33070


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