Compiler crash in the static type checker

java.lang.ArrayIndexOutOfBoundsException: 1
at org.codehaus.groovy.ast.tools.GenericsUtils.extractPlaceholders(GenericsUtils.java:164)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.inferReturnTypeGenerics(StaticTypeCheckingVisitor.java:4152)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.existsProperty(StaticTypeCheckingVisitor.java:1238)
at org.codehaus.groovy.transform.sc.StaticCompilationVisitor.existsProperty(StaticCompilationVisitor.java:419)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.existsProperty(StaticTypeCheckingVisitor.java:1132)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitPropertyExpressionSilent(StaticTypeCheckingVisitor.java:494)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitPropertyExpression(StaticTypeCheckingVisitor.java:499)
at org.codehaus.groovy.transform.sc.StaticCompilationVisitor.visitPropertyExpression(StaticCompilationVisitor.java:433)
at org.codehaus.groovy.ast.expr.PropertyExpression.visit(PropertyExpression.java:55)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitBinaryExpression(StaticTypeCheckingVisitor.java:545)
at org.codehaus.groovy.ast.expr.BinaryExpression.visit(BinaryExpression.java:49)
at org.codehaus.groovy.ast.CodeVisitorSupport.visitExpressionStatement(CodeVisitorSupport.java:69)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitExpressionStatement(ClassCodeVisitorSupport.java:193)
at org.codehaus.groovy.ast.stmt.ExpressionStatement.visit(ExpressionStatement.java:40)
at org.codehaus.groovy.ast.CodeVisitorSupport.visitBlockStatement(CodeVisitorSupport.java:35)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitBlockStatement(ClassCodeVisitorSupport.java:163)
at org.codehaus.groovy.ast.stmt.BlockStatement.visit(BlockStatement.java:69)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClassCodeContainer(ClassCodeVisitorSupport.java:101)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitConstructorOrMethod(ClassCodeVisitorSupport.java:112)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitConstructorOrMethod(StaticTypeCheckingVisitor.java:1756)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitMethod(ClassCodeVisitorSupport.java:123)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.startMethodInference(StaticTypeCheckingVisitor.java:2089)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitMethod(StaticTypeCheckingVisitor.java:2048)
at org.codehaus.groovy.transform.sc.StaticCompilationVisitor.visitMethod(StaticCompilationVisitor.java:160)
at org.codehaus.groovy.ast.ClassNode.visitContents(ClassNode.java:1083)
at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClass(ClassCodeVisitorSupport.java:50)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitClass(StaticTypeCheckingVisitor.java:244)
at org.codehaus.groovy.transform.sc.StaticCompilationVisitor.visitClass(StaticCompilationVisitor.java:119)
at org.codehaus.groovy.transform.sc.StaticCompileTransformation.visit(StaticCompileTransformation.java:60)
at org.codehaus.groovy.transform.ASTTransformationVisitor.visitClass(ASTTransformationVisitor.java:132)
at org.codehaus.groovy.transform.ASTTransformationVisitor$2.call(ASTTransformationVisitor.java:176)
at org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:1052)
at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:588)
at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:566)
at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:543)
at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:522)
...