PG-1038 Add regression tests that causes PG crash

expected/tablespace.out

@@ -0,0 +1 @@
+// TODO

sql/tablespace.sql

@@ -0,0 +1,26 @@
+CREATE EXTENSION pg_tde;
+
+SELECT  * FROM pg_tde_principal_key_info();
+
+SELECT pg_tde_add_key_provider_file('file-vault','/tmp/pg_tde_test_keyring.per');
+SELECT pg_tde_set_principal_key('test-db-principal-key','file-vault');
+
+
+CREATE TABLE test(num1 bigint, num2 double precision, t text);
+INSERT INTO test(num1, num2, t)
+  SELECT round(random()*100), random(), 'text'
+  FROM generate_series(1, 10) s(i);
+CREATE INDEX test_idx ON test(num1);
+
+SET allow_in_place_tablespaces = true;
+CREATE TABLESPACE test_tblspace LOCATION '';
+
+ALTER TABLE test SET TABLESPACE test_tblspace;
+ALTER TABLE test SET TABLESPACE pg_default;
+
+REINDEX (TABLESPACE test_tblspace, CONCURRENTLY) TABLE test;
+INSERT INTO test VALUES (10, 2);
+
+DROP TABLE test;
+DROP TABLESPACE test_tblspace;
+DROP EXTENSION pg_tde;

src/access/pg_tde_slot.c

@@ -511,6 +511,9 @@ PGTdeExecStoreBufferHeapTuple(Relation rel,
 	if (rel->rd_rel->relkind != RELKIND_TOASTVALUE)
 	{
 		RelKeyData *key = get_current_slot_relation_key(bslot, rel);
+
+		Assert(key != NULL);
+
 		slot_copytuple(bslot->decrypted_buffer, tuple);
 		PG_TDE_DECRYPT_TUPLE_EX(tuple, (HeapTuple)bslot->decrypted_buffer, key, "ExecStoreBuffer");
 		tuple->t_data = ((HeapTuple)bslot->decrypted_buffer)->t_data;