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java.lang.NullPointerException: 	at com.sun.tools.javafx.comp.JavafxToBound.visitBlockExpression(JavafxToBound.java:516)	at com.sun.tools.javafx.tree.JFXBlock.accept(JFXBlock.java:83)	at com.sun.tools.javafx.comp.JavafxToBound.translate(JavafxToBound.java:167)	at com.sun.tools.javafx.comp.JavafxToBound.translate(JavafxToBound.java:182)	at com.sun.tools.javafx.comp.JavafxToBound.translateForConditional(JavafxToBound.java:149)	at com.sun.tools.javafx.comp.JavafxToBound.visitIfExpression(JavafxToBound.java:1025)	at com.sun.tools.javafx.tree.JFXIfExpression.accept(JFXIfExpression.java:48)	at com.sun.tools.javafx.comp.JavafxToBound.translate(JavafxToBound.java:167)	at com.sun.tools.javafx.comp.JavafxToBound.visitBlockExpression(JavafxToBound.java:516)	at com.sun.tools.javafx.tree.JFXBlock.accept(JFXBlock.java:83)	at com.sun.tools.javafx.comp.JavafxToBound.translate(JavafxToBound.java:167)	at com.sun.tools.javafx.comp.JavafxToBound.translateAsResult(JavafxToBound.java:142)	at com.sun.tools.javafx.comp.JavafxToBound.translateAsLocation(JavafxToBound.java:132)	at com.sun.tools.javafx.comp.JavafxToJava$FunctionTranslator.methodBody(JavafxToJava.java:2158)	at com.sun.tools.javafx.comp.JavafxToJava$FunctionTranslator.doit(JavafxToJava.java:2217)	at com.sun.tools.javafx.comp.JavafxToJava.visitFunctionDefinition(JavafxToJava.java:2230)	at com.sun.tools.javafx.tree.JFXFunctionDefinition.accept(JFXFunctionDefinition.java:93)	at com.sun.tools.javafx.comp.JavafxToJava.translateGeneric(JavafxToJava.java:466)	at com.sun.tools.javafx.comp.JavafxToJava.translate(JavafxToJava.java:475)	at com.sun.tools.javafx.comp.JavafxToJava.visitClassDeclaration(JavafxToJava.java:1211)	at com.sun.tools.javafx.tree.JFXClassDeclaration.accept(JFXClassDeclaration.java:141)	at com.sun.tools.javafx.comp.JavafxToJava.translateGeneric(JavafxToJava.java:466)	at com.sun.tools.javafx.comp.JavafxToJava.translate(JavafxToJava.java:487)	at com.sun.tools.javafx.comp.JavafxToJava.visitScript(JavafxToJava.java:1102)	at com.sun.tools.javafx.tree.JFXScript.accept(JFXScript.java:89)	at com.sun.tools.javafx.comp.JavafxToJava.translateGeneric(JavafxToJava.java:466)	at com.sun.tools.javafx.comp.JavafxToJava.translate(JavafxToJava.java:483)	at com.sun.tools.javafx.comp.JavafxToJava.toJava(JavafxToJava.java:657)	at com.sun.tools.javafx.main.JavafxCompiler.jfxToJava(JavafxCompiler.java:728)	at com.sun.tools.javafx.main.JavafxCompiler.jfxToJava(JavafxCompiler.java:699)	at com.sun.tools.javafx.main.JavafxCompiler.compile2(JavafxCompiler.java:785)	at com.sun.tools.javafx.main.JavafxCompiler.compile(JavafxCompiler.java:685)	at com.sun.tools.javafx.main.Main.compile(Main.java:624)	at com.sun.tools.javafx.main.Main.compile(Main.java:312)	at com.sun.tools.javafx.Main.compile(Main.java:84)	at com.sun.tools.javafx.Main.main(Main.java:69)