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