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java.lang.AssertionError: typeSig ERROR	at com.sun.tools.javac.code.Types$SignatureGenerator.assembleSig(Types.java:4796)	at com.sun.tools.javac.jvm.ClassWriter$CWSignatureGenerator.assembleSig(ClassWriter.java:299)	at com.sun.tools.javac.jvm.ClassWriter.typeSig(ClassWriter.java:342)	at com.sun.tools.javac.jvm.ClassWriter.writeCompoundAttribute(ClassWriter.java:891)	at com.sun.tools.javac.jvm.ClassWriter.writeJavaAnnotations(ClassWriter.java:759)	at com.sun.tools.javac.jvm.ClassWriter.writeMemberAttrs(ClassWriter.java:628)	at com.sun.tools.javac.jvm.ClassWriter.writeMethod(ClassWriter.java:1133)	at com.sun.tools.javac.jvm.ClassWriter.writeMethods(ClassWriter.java:1603)	at com.sun.tools.javac.jvm.ClassWriter.writeClassFile(ClassWriter.java:1693)	at com.sun.tools.javac.jvm.ClassWriter.writeClass(ClassWriter.java:1621)	at com.sun.tools.javac.main.JavaCompiler.genCode(JavaCompiler.java:746)	at com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1572)	at com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1536)	at com.sun.tools.javac.main.JavaCompiler.compile2(JavaCompiler.java:901)	at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:860)	at com.sun.tools.javac.main.Main.compile(Main.java:523)	at com.sun.tools.javac.main.Main.compile(Main.java:381)	at com.sun.tools.javac.main.Main.compile(Main.java:370)	at com.sun.tools.javac.main.Main.compile(Main.java:361)	at com.sun.tools.javac.Main.compile(Main.java:56)	at com.sun.tools.javac.Main.main(Main.java:42)