diff --git a/src/backend/commands/copy.c b/src/backend/commands/copy.c
new file mode 100644
index 8778e8b..ec7c311
*** a/src/backend/commands/copy.c
--- b/src/backend/commands/copy.c
*************** CopyFrom(CopyState cstate)
*** 2009,2023 ****
  		 *
  		 * As noted above rd_newRelfilenodeSubid is not set in all cases
  		 * where we can apply the optimization, so in those rare cases
! 		 * where we cannot honour the request we do so silently.
  		 */
! 		if (cstate->freeze &&
! 			ThereAreNoPriorRegisteredSnapshots() &&
! 			ThereAreNoReadyPortals() &&
! 			(cstate->rel->rd_newRelfilenodeSubid == GetCurrentSubTransactionId() ||
! 			 cstate->rel->rd_createSubid == GetCurrentSubTransactionId()))
! 			hi_options |= HEAP_INSERT_FROZEN;
  	}
  
  	/*
  	 * We need a ResultRelInfo so we can use the regular executor's
--- 2009,2029 ----
  		 *
  		 * As noted above rd_newRelfilenodeSubid is not set in all cases
  		 * where we can apply the optimization, so in those rare cases
! 		 * where we cannot honor the request.
  		 */
! 		if (cstate->freeze)
! 		{
! 			if (ThereAreNoPriorRegisteredSnapshots() &&
! 				ThereAreNoReadyPortals() &&
! 				(cstate->rel->rd_newRelfilenodeSubid == GetCurrentSubTransactionId() ||
! 				 cstate->rel->rd_createSubid == GetCurrentSubTransactionId()))
! 				hi_options |= HEAP_INSERT_FROZEN;
! 			else
! 				ereport(ERROR, (errmsg("cannot perform FREEZE operation due to invalid table or transaction state")));
! 		}
  	}
+ 	else if (cstate->freeze)
+ 		ereport(ERROR, (errmsg("cannot perform FREEZE operation due to invalid table or transaction state")));
  
  	/*
  	 * We need a ResultRelInfo so we can use the regular executor's
diff --git a/src/test/regress/expected/copy2.out b/src/test/regress/expected/copy2.out
new file mode 100644
index 78c601f..e19cc5b
*** a/src/test/regress/expected/copy2.out
--- b/src/test/regress/expected/copy2.out
*************** SELECT * FROM vistest;
*** 334,355 ****
  COMMIT;
  TRUNCATE vistest;
  COPY vistest FROM stdin CSV FREEZE;
  BEGIN;
  INSERT INTO vistest VALUES ('z');
  SAVEPOINT s1;
  TRUNCATE vistest;
  ROLLBACK TO SAVEPOINT s1;
  COPY vistest FROM stdin CSV FREEZE;
! SELECT * FROM vistest;
!  a  
! ----
!  p
!  g
!  z
!  d3
!  e
! (5 rows)
! 
  COMMIT;
  CREATE FUNCTION truncate_in_subxact() RETURNS VOID AS
  $$
--- 334,347 ----
  COMMIT;
  TRUNCATE vistest;
  COPY vistest FROM stdin CSV FREEZE;
+ ERROR:  cannot perform FREEZE operation due to invalid table or transaction state
  BEGIN;
  INSERT INTO vistest VALUES ('z');
  SAVEPOINT s1;
  TRUNCATE vistest;
  ROLLBACK TO SAVEPOINT s1;
  COPY vistest FROM stdin CSV FREEZE;
! ERROR:  cannot perform FREEZE operation due to invalid table or transaction state
  COMMIT;
  CREATE FUNCTION truncate_in_subxact() RETURNS VOID AS
  $$
diff --git a/src/test/regress/sql/copy2.sql b/src/test/regress/sql/copy2.sql
new file mode 100644
index 55568e6..87b847c
*** a/src/test/regress/sql/copy2.sql
--- b/src/test/regress/sql/copy2.sql
*************** COPY vistest FROM stdin CSV FREEZE;
*** 242,248 ****
  d3
  e
  \.
- SELECT * FROM vistest;
  COMMIT;
  CREATE FUNCTION truncate_in_subxact() RETURNS VOID AS
  $$
--- 242,247 ----