Comment # 2 on bug 966053 from Michael Andres

was fixed:
  SLE-12-SP2      zypper 1.13.1    
  SLE-12-SP1      zypper 1.12.41   
  SLE-12          zypper 1.11.55   
  SLE-11-SP3/4    zypper 1.6.331

*** This bug has been marked as a duplicate of bug 980263 ***