diff --git a/src/backend/access/transam/xloginsert.c b/src/backend/access/transam/xloginsert.c
index de869e00ff..5bea073a2b 100644
*** a/src/backend/access/transam/xloginsert.c
--- b/src/backend/access/transam/xloginsert.c
***************
*** 584,590 **** XLogRecordAssemble(RmgrId rmid, uint8 info,
  		if (include_image)
  		{
  			Page		page = regbuf->page;
! 			uint16		compressed_len;
  
  			/*
  			 * The page needs to be backed up, so calculate its hole length
--- 584,590 ----
  		if (include_image)
  		{
  			Page		page = regbuf->page;
! 			uint16		compressed_len = 0;
  
  			/*
  			 * The page needs to be backed up, so calculate its hole length
diff --git a/src/backend/catalog/objectaddressindex b4c2467710..3fa5b6e1db 100644
*** a/src/backend/catalog/objectaddress.c
--- b/src/backend/catalog/objectaddress.c
***************
*** 1576,1583 **** get_object_address_opf_member(ObjectType objtype,
  	ObjectAddress address;
  	ListCell   *cell;
  	List	   *copy;
! 	TypeName   *typenames[2];
! 	Oid			typeoids[2];
  	int			membernum;
  	int			i;
  
--- 1576,1583 ----
  	ObjectAddress address;
  	ListCell   *cell;
  	List	   *copy;
! 	TypeName   *typenames[2] = { NULL };
! 	Oid			typeoids[2] = { InvalidOid };
  	int			membernum;
  	int			i;
  
diff --git a/src/backend/utils/sort/logtapindex 66bfcced8d..d6794bf3de 100644
*** a/src/backend/utils/sort/logtape.c
--- b/src/backend/utils/sort/logtape.c
***************
*** 411,417 **** ltsConcatWorkerTapes(LogicalTapeSet *lts, TapeShare *shared,
  					 SharedFileSet *fileset)
  {
  	LogicalTape *lt = NULL;
! 	long		tapeblocks;
  	long		nphysicalblocks = 0L;
  	int			i;
  
--- 411,417 ----
  					 SharedFileSet *fileset)
  {
  	LogicalTape *lt = NULL;
! 	long		tapeblocks = 0L;
  	long		nphysicalblocks = 0L;
  	int			i;
  
diff --git a/src/bin/pgbench/pgbench.c index 31ea6ca06e..8b0c8bcaa8 100644
*** a/src/bin/pgbench/pgbench.c
--- b/src/bin/pgbench/pgbench.c
***************
*** 1614,1620 **** evalLazyFunc(TState *thread, CState *st,
  			 PgBenchFunction func, PgBenchExprLink *args, PgBenchValue *retval)
  {
  	PgBenchValue a1, a2;
! 	bool ba1, ba2;
  
  	Assert(isLazyFunc(func) && args != NULL && args->next != NULL);
  
--- 1614,1620 ----
  			 PgBenchFunction func, PgBenchExprLink *args, PgBenchValue *retval)
  {
  	PgBenchValue a1, a2;
! 	bool ba1 = NULL, ba2 = NULL;
  
  	Assert(isLazyFunc(func) && args != NULL && args->next != NULL);
  
***************
*** 1935,1941 **** evalStandardFunc(
  			/* logical operators */
  		case PGBENCH_NOT:
  			{
! 				bool b;
  				if (!coerceToBool(&vargs[0], &b))
  					return false;
  
--- 1935,1941 ----
  			/* logical operators */
  		case PGBENCH_NOT:
  			{
! 				bool b = NULL;
  				if (!coerceToBool(&vargs[0], &b))
  					return false;