I think there is one thing that could be improved here. The isolation test index-killtuples (377b7ab1452) adds a new dependency: contrib/btree_gin. contrib/btree_gist. This must be taken into
account in the makefile.
Prior to this patch, isolation tests could be carried out independently using "make check -C src/test/isolation", but they now require make check-world to execute successfully, otherwise this test fails with:
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step create_ext_btree_gist: CREATE EXTENSION btree_gist; +ERROR: extension "btree_gist" is not available step create_gist: CREATE INDEX kill_prior_tuple_gist ON kill_prior_tuple USING gist (key); +ERROR: data type integer has no default operator class for access method "gist" step flush: SELECT FROM pg_stat_force_next_flush();