CN: Class proguard.classfile.NameAndTypeCpInfo implements Cloneable but does not define or use clone method (M) 
proguard/classfile/util/ClassUtil.java:495:495 SBSC: Method proguard.classfile.util.ClassUtil.externalType(String) concatenates strings using + in a loop (M) 
proguard/obfuscate/ClassFileRenamer.java:422:422 SBSC: Method proguard.obfuscate.ClassFileRenamer.newDescriptor(String,proguard.classfile.ClassFile[]) concatenates strings using + in a loop (M) 
proguard/gui/ProGuardGUI.java:487:487 UI: Usage of GetResource in proguard.gui.ProGuardGUI.<init>() may be unsafe if class is extended (M) 
proguard/wtk/ProGuardObfuscator.java:78:78 UI: Usage of GetResource in proguard.wtk.ProGuardObfuscator.run(java.io.File,String,String,String,String,String,String) may be unsafe if class is extended (M) 
MS: proguard.classfile.instruction.InstructionConstants.NAMES should be moved out of an interface and made package protected (M) 
Warnings generated: 6