[
https://issues.apache.org/jira/browse/GROOVY-10033?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17326854#comment-17326854
]
Eric Milles commented on GROOVY-10033:
--------------------------------------
Can you change your inner class Y to static? You have an inferred parameter
for the outer class reference, so the constructor reference does not line up.
> Compiler crash when encountering function reference on nested class
> -------------------------------------------------------------------
>
> Key: GROOVY-10033
> URL: https://issues.apache.org/jira/browse/GROOVY-10033
> Project: Groovy
> Issue Type: Bug
> Components: Static compilation
> Reporter: Thodoris Sotiropoulos
> Assignee: Eric Milles
> Priority: Major
>
> The following program
>
> {code:java}
> class Foo {
> protected Foo(Closure<Foo, Bar> x) {}
> }
> class Bar {
> Bar(Foo x) {}
> }
> public class X extends Foo {
> public X() {
> super(Y::new);
> }
> private class Y extends Bar {
> Y(Foo x) {
> super(x);
> }
> }
> }
> {code}
>
> crashes the compiler with a NullPointerException
> {code:java}
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup
> failed:
> General error during instruction selection: NullPointerException while
> processing test.groovy. test.groovygroovy.lang.GroovyRuntimeException:
> NullPointerException while processing test.groovy. test.groovy
> at
> org.codehaus.groovy.classgen.AsmClassGenerator.visitClass(AsmClassGenerator.java:348)
> at
> org.codehaus.groovy.control.CompilationUnit$3.call(CompilationUnit.java:783)
> at
> org.codehaus.groovy.control.CompilationUnit$IPrimaryClassNodeOperation.doPhaseOperation(CompilationUnit.java:928)
> at
> org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:657)
> at
> org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:634)
> at
> org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:609)
> at
> org.codehaus.groovy.tools.FileSystemCompiler.compile(FileSystemCompiler.java:311)
> at
> org.codehaus.groovy.tools.FileSystemCompiler.doCompilation(FileSystemCompiler.java:240)
> at
> org.codehaus.groovy.tools.FileSystemCompiler.commandLineCompile(FileSystemCompiler.java:165)
> at
> org.codehaus.groovy.tools.FileSystemCompiler.commandLineCompileWithErrorHandling(FileSystemCompiler.java:205)
> at
> org.codehaus.groovy.tools.FileSystemCompiler.main(FileSystemCompiler.java:189)
> Caused by: java.lang.NullPointerException
> at
> org.codehaus.groovy.classgen.asm.sc.StaticTypesMethodReferenceExpressionWriter.createParametersWithExactType(StaticTypesMethodReferenceExpressionWriter.java:255)
> at
> org.codehaus.groovy.classgen.asm.sc.StaticTypesMethodReferenceExpressionWriter.writeMethodReferenceExpression(StaticTypesMethodReferenceExpressionWriter.java:97)
> at
> org.codehaus.groovy.classgen.AsmClassGenerator.visitMethodReferenceExpression(AsmClassGenerator.java:844)
> at
> org.codehaus.groovy.ast.expr.MethodReferenceExpression.visit(MethodReferenceExpression.java:34)
> at
> org.codehaus.groovy.classgen.asm.sc.StaticInvocationWriter.visitArgument(StaticInvocationWriter.java:517)
> at
> org.codehaus.groovy.classgen.asm.sc.StaticInvocationWriter.loadArguments(StaticInvocationWriter.java:464)
> at
> org.codehaus.groovy.classgen.asm.sc.StaticInvocationWriter.writeSpecialConstructorCall(StaticInvocationWriter.java:212)
> at
> org.codehaus.groovy.classgen.AsmClassGenerator.visitConstructorCallExpression(AsmClassGenerator.java:917)
> at
> org.codehaus.groovy.ast.expr.ConstructorCallExpression.visit(ConstructorCallExpression.java:45)
> at
> org.codehaus.groovy.classgen.asm.StatementWriter.writeExpressionStatement(StatementWriter.java:602)
> at
> org.codehaus.groovy.classgen.AsmClassGenerator.visitExpressionStatement(AsmClassGenerator.java:744)
> at
> org.codehaus.groovy.ast.stmt.ExpressionStatement.visit(ExpressionStatement.java:41)
> at
> org.codehaus.groovy.classgen.asm.StatementWriter.writeBlockStatement(StatementWriter.java:92)
> at
> org.codehaus.groovy.classgen.asm.sc.StaticTypesStatementWriter.writeBlockStatement(StaticTypesStatementWriter.java:78)
> at
> org.codehaus.groovy.classgen.AsmClassGenerator.visitBlockStatement(AsmClassGenerator.java:675)
> at
> org.codehaus.groovy.ast.stmt.BlockStatement.visit(BlockStatement.java:70)
> at
> org.codehaus.groovy.classgen.AsmClassGenerator.visitStdMethod(AsmClassGenerator.java:516)
> at
> org.codehaus.groovy.classgen.AsmClassGenerator.visitConstructorOrMethod(AsmClassGenerator.java:461)
> at
> org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitConstructor(ClassCodeVisitorSupport.java:101)
> at
> org.codehaus.groovy.classgen.AsmClassGenerator.visitConstructor(AsmClassGenerator.java:608)
> at
> org.codehaus.groovy.ast.ClassNode.visitContents(ClassNode.java:1097)
> at
> org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClass(ClassCodeVisitorSupport.java:52)
> at
> org.codehaus.groovy.classgen.AsmClassGenerator.visitClass(AsmClassGenerator.java:325)
> ... 10 more1 error
> {code}
> Tested against
> [https://github.com/apache/groovy/commit/e64215983ea4b7c277eb01a1ed3fcac43976be9c]
>
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