java.lang.NullPointerException: This exception has no message.

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project import throws jsni parser exceptions

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Fix JSNI Parser NPE

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GitHub comment 221#252372222

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java.lang.NullPointerException: 	at com.google.gwt.dev.js.JsParser.makeSourceInfo(JsParser.java:164)	at com.google.gwt.dev.js.JsParser.mapExprStmt(JsParser.java:606)	at com.google.gwt.dev.js.JsParser.map(JsParser.java:197)	at com.google.gwt.dev.js.JsParser.mapStatement(JsParser.java:1029)	at com.google.gwt.dev.js.JsParser.mapStatements(JsParser.java:1049)	at com.google.gwt.dev.js.JsParser.mapBlock(JsParser.java:445)	at com.google.gwt.dev.js.JsParser.mapFunction(JsParser.java:721)	at com.google.gwt.dev.js.JsParser.map(JsParser.java:299)	at com.google.gwt.dev.js.JsParser.mapStatement(JsParser.java:1029)	at com.google.gwt.dev.js.JsParser.mapStatements(JsParser.java:1049)	at com.google.gwt.dev.js.JsParser.mapStatements(JsParser.java:1063)	at com.google.gwt.dev.js.JsParser.parseImpl(JsParser.java:138)	at com.google.gwt.dev.js.JsParser.parse(JsParser.java:89)	at com.google.gwt.eclipse.core.validators.java.JsniParser.parseFunctionBlock(JsniParser.java:378)	at com.google.gwt.eclipse.core.validators.java.JsniParser.parse(JsniParser.java:298)	at com.google.gwt.eclipse.core.validators.java.JsniParser.findJavaRefs(JsniParser.java:334)	at com.google.gwt.eclipse.core.validators.java.JsniParser.parse(JsniParser.java:250)	at com.google.gwt.eclipse.core.validators.java.JavaValidationVisitor.endVisit(JavaValidationVisitor.java:33)	at org.eclipse.jdt.core.dom.MethodDeclaration.accept0(MethodDeclaration.java:637)	at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2711)	at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2782)	at org.eclipse.jdt.core.dom.TypeDeclaration.accept0(TypeDeclaration.java:470)	at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2711)	at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2782)	at org.eclipse.jdt.core.dom.CompilationUnit.accept0(CompilationUnit.java:212)	at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2711)	at com.google.gwt.eclipse.core.validators.java.JavaCompilationParticipant.validateCompilationUnit(JavaCompilationParticipant.java:125)	at com.google.gwt.eclipse.core.validators.java.JavaCompilationParticipant$2.acceptAST(JavaCompilationParticipant.java:369)	at org.eclipse.jdt.core.dom.CompilationUnitResolver.resolve(CompilationUnitResolver.java:907)	at org.eclipse.jdt.core.dom.CompilationUnitResolver.resolve(CompilationUnitResolver.java:588)	at org.eclipse.jdt.core.dom.ASTParser.createASTs(ASTParser.java:899)	at org.eclipse.jdt.internal.corext.dom.ASTBatchParser.createASTs(ASTBatchParser.java:85)	at com.google.gwt.eclipse.core.validators.java.JavaCompilationParticipant.handleBuildStarting(JavaCompilationParticipant.java:322)	at com.google.gwt.eclipse.core.validators.java.JavaCompilationParticipant.access$0(JavaCompilationParticipant.java:303)	at com.google.gwt.eclipse.core.validators.java.JavaCompilationParticipant$1.run(JavaCompilationParticipant.java:193)	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)