Android 混淆 Unknown verification type

Android工程打包sdk，导出jar已被混淆，该jar被第三方使用，混淆时出现Unknown verification type [*] in stack map frame问题，测试发现

		if(){
			
		}else{
			Log.cerateLog("something");
		}

public class Log {
	
	public static boolean debug = false;
	
	public static void cerateLog(String str){
		if(debug){
			Log.i("TAG", str);
		}
	}

}

Log.cerateLog("something");

String aa = "something"
Log.cerateLog(aa);

Android 混淆 Unknown verification type

原文：http://blog.csdn.net/dianyueneo/article/details/43058691