*** a/src/backend/access/common/heaptuple.c
--- b/src/backend/access/common/heaptuple.c
***************
*** 801,806 **** heap_formtuple(TupleDesc tupleDescriptor,
--- 801,808 ----
  
  	tuple = heap_form_tuple(tupleDescriptor, values, boolNulls);
  
+ 	pfree(boolNulls);
+ 
  	return tuple;
  }
  
***************
*** 894,899 **** heap_modifytuple(HeapTuple tuple,
--- 896,902 ----
  {
  	int			numberOfAttributes = tupleDesc->natts;
  	int			attnum;
+ 	HeapTuple	result;
  	bool	   *replNulls = (bool *) palloc(numberOfAttributes * sizeof(bool));
  	bool	   *replActions = (bool *) palloc(numberOfAttributes * sizeof(bool));
  
***************
*** 903,909 **** heap_modifytuple(HeapTuple tuple,
  		replActions[attnum] = replCharActions[attnum] == 'r';
  	}
  
! 	return heap_modify_tuple(tuple, tupleDesc, replValues, replNulls, replActions);
  }
  
  /*
--- 906,917 ----
  		replActions[attnum] = replCharActions[attnum] == 'r';
  	}
  
! 	result = heap_modify_tuple(tuple, tupleDesc, replValues, replNulls, replActions);
! 
! 	pfree(replNulls);
! 	pfree(replActions);
! 
! 	return result;
  }
  
  /*
***************
*** 1051,1056 **** heap_deformtuple(HeapTuple tuple,
--- 1059,1066 ----
  		charNulls[attnum] = boolNulls[attnum] ? 'n' : ' ';
  	}
  
+ 	pfree(boolNulls);
+ 
  }
  
  /*