Summary: fixed the incorrect implementation in expr(...)
Reviewed-by: psandoz, alanb

Summary: Reference output file contains extra colon
Reviewed-by: sspitsyn, mgronlun

Reviewed-by: darcy, jgish

Reviewed-by: alanb
Contributed-by: amy.lu@oracle.com

Summary: Add missing calls to free
Reviewed-by: alanb, dholmes, sherman