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  1. JDK
  2. JDK-8220390

Nested Lambda method reference exposes compiler bug

    Details

    • Type: Bug
    • Status: Closed
    • Priority: P4
    • Resolution: Duplicate
    • Affects Version/s: 11.0.2
    • Fix Version/s: None
    • Component/s: tools
    • Subcomponent:
    • CPU:
      x86_64
    • OS:
      generic

      Description

      A DESCRIPTION OF THE PROBLEM :
      See source code. Not 100% sure on the exact cause.

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      javac BadClass.java

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      Class compiles without issue.
      ACTUAL -
      An exception has occurred in the compiler (11.0.2). Please file a bug against the Java compiler via the Java bug reporting page (http://bugreport.java.com) after checking the Bug Database (http://bugs.java.com) for duplicates. Include y
      our program and the following diagnostic in your report. Thank you.
      java.lang.AssertionError
              at jdk.compiler/com.sun.tools.javac.util.Assert.error(Assert.java:155)
              at jdk.compiler/com.sun.tools.javac.util.Assert.check(Assert.java:46)
              at jdk.compiler/com.sun.tools.javac.comp.DeferredAttr$2$1.setOverloadKind(DeferredAttr.java:172)
              at jdk.compiler/com.sun.tools.javac.comp.ArgumentAttr.visitReference(ArgumentAttr.java:283)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMemberReference.accept(JCTree.java:2190)
              at jdk.compiler/com.sun.tools.javac.comp.ArgumentAttr.attribArg(ArgumentAttr.java:197)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:653)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribArgs(Attr.java:751)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.visitApply(Attr.java:1997)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1634)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:655)
              at jdk.compiler/com.sun.tools.javac.comp.DeferredAttr.attribSpeculative(DeferredAttr.java:498)
              at jdk.compiler/com.sun.tools.javac.comp.DeferredAttr.attribSpeculative(DeferredAttr.java:481)
              at jdk.compiler/com.sun.tools.javac.comp.ArgumentAttr.lambda$processArg$0(ArgumentAttr.java:220)
              at jdk.compiler/com.sun.tools.javac.comp.ArgumentAttr.processArg(ArgumentAttr.java:242)
              at jdk.compiler/com.sun.tools.javac.comp.ArgumentAttr.processArg(ArgumentAttr.java:219)
              at jdk.compiler/com.sun.tools.javac.comp.ArgumentAttr.visitApply(ArgumentAttr.java:307)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1634)
              at jdk.compiler/com.sun.tools.javac.comp.ArgumentAttr.attribArg(ArgumentAttr.java:197)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:653)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribArgs(Attr.java:751)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.visitApply(Attr.java:1997)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1634)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:655)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.visitReturn(Attr.java:1866)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCReturn.accept(JCTree.java:1546)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:655)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribStat(Attr.java:724)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribStats(Attr.java:743)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.visitLambda(Attr.java:2598)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCLambda.accept(JCTree.java:1807)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:655)
              at jdk.compiler/com.sun.tools.javac.comp.DeferredAttr$4.complete(DeferredAttr.java:374)
              at jdk.compiler/com.sun.tools.javac.comp.DeferredAttr$DeferredType.check(DeferredAttr.java:335)
              at jdk.compiler/com.sun.tools.javac.comp.DeferredAttr$DeferredType.check(DeferredAttr.java:321)
              at jdk.compiler/com.sun.tools.javac.comp.Resolve$MethodResultInfo.check(Resolve.java:1060)
              at jdk.compiler/com.sun.tools.javac.comp.Resolve$4.checkArg(Resolve.java:887)
              at jdk.compiler/com.sun.tools.javac.comp.Resolve$AbstractMethodCheck.argumentsAcceptable(Resolve.java:775)
              at jdk.compiler/com.sun.tools.javac.comp.Resolve$4.argumentsAcceptable(Resolve.java:896)
              at jdk.compiler/com.sun.tools.javac.comp.Infer.instantiateMethod(Infer.java:181)
              at jdk.compiler/com.sun.tools.javac.comp.Resolve.rawInstantiate(Resolve.java:605)
              at jdk.compiler/com.sun.tools.javac.comp.Resolve.checkMethod(Resolve.java:644)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.checkMethod(Attr.java:4120)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.checkIdInternal(Attr.java:3913)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.checkMethodIdInternal(Attr.java:3814)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.checkId(Attr.java:3803)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.visitSelect(Attr.java:3696)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:2110)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:655)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.visitApply(Attr.java:2006)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1634)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:655)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.visitReturn(Attr.java:1866)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCReturn.accept(JCTree.java:1546)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:655)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribStat(Attr.java:724)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribStats(Attr.java:743)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1294)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1020)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:655)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribStat(Attr.java:724)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.visitMethodDef(Attr.java:1098)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:866)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:655)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribStat(Attr.java:724)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:4683)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4574)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4503)
              at jdk.compiler/com.sun.tools.javac.comp.Attr.attrib(Attr.java:4448)
              at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1341)
              at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:973)
              at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:311)
              at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:170)
              at jdk.compiler/com.sun.tools.javac.Main.compile(Main.java:57)
              at jdk.compiler/com.sun.tools.javac.Main.main(Main.java:43)



      ---------- BEGIN SOURCE ----------
      import java.util.Arrays;
      import java.util.function.BiFunction;
      import java.util.function.Function;
      import java.util.stream.Stream;

      public class BadClass {

          private static Stream<Object> badMethod(final Object object,
                                                  final Function<Object, Object>[] objects,
                                                  final BiFunction<Object, Object, Object> func) {
              return Arrays.stream(objects)
                      .map(o -> {
                          return func.apply(o.toString(), runFunction(object, o::apply));
                      });
          }

          public static <T, R> R runFunction(final T object, final Function<T, R> func) {
              return object == null ? null : func.apply(object);
          }
      }

      ---------- END SOURCE ----------

      CUSTOMER SUBMITTED WORKAROUND :
      Replacing the 'o::apply' Lambda method reference with 'o -> o.apply' fixes the issue.

      FREQUENCY : always


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              • Assignee:
                pmangal Priyanka Mangal (Inactive)
                Reporter:
                webbuggrp Webbug Group
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                Dates

                • Created:
                  Updated:
                  Resolved: