JDK-8157845 : javac: AssertionError: isSubClass T
  • Type: Bug
  • Component: tools
  • Sub-Component: javac
  • Affected Version: 8
  • Priority: P4
  • Status: Closed
  • Resolution: Duplicate
  • OS: windows_7
  • CPU: x86_64
  • Submitted: 2016-05-25
  • Updated: 2016-05-26
  • Resolved: 2016-05-25
Related Reports
Duplicate :  
JDK-8073842 - Invalid method reference when referencing a method on a wildcard type
Description
FULL PRODUCT VERSION :
java version "1.8.0_92"
Java(TM) SE Runtime Environment (build 1.8.0_92-b14)
Java HotSpot(TM) Client VM (build 25.92-b14, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
Bug JDK-8133123 has been fixed for java 9, but not for java 8.
It should be fixed for java 8, too. The problem is still occurring with jdk 1.8.0_92.

Using javac from jdk 9-ea+118, compilation works fine.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1.) Download the java files attached to JDK-8133123
2.) complie them using javac from jdk 1.8.0_92: javac *.java

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Should compile correctly
ACTUAL -
Compiler crashes with the following stacktrace:

An exception has occurred in the compiler (1.8.0_92). Please file a bug against
the Java compiler via the Java bug reporting page (http://bugreport.java.com) af
ter checking the Bug Database (http://bugs.java.com) for duplicates. Include you
r program and the following diagnostic in your report. Thank you.
java.lang.AssertionError: isSubClass T
        at com.sun.tools.javac.code.Symbol.isSubClass(Symbol.java:447)
        at com.sun.tools.javac.code.Symbol.isMemberOf(Symbol.java:456)
        at com.sun.tools.javac.code.Symbol$MethodSymbol.overrides(Symbol.java:14
79)
        at com.sun.tools.javac.code.Types$ImplementationCache.implementationInte
rnal(Types.java:2693)
        at com.sun.tools.javac.code.Types$ImplementationCache.get(Types.java:267
5)
        at com.sun.tools.javac.code.Types.implementation(Types.java:2704)
        at com.sun.tools.javac.code.Symbol$MethodSymbol.implementation(Symbol.ja
va:1539)
        at com.sun.tools.javac.code.Symbol$MethodSymbol.implementation(Symbol.ja
va:1528)
        at com.sun.tools.javac.comp.Resolve.notOverriddenIn(Resolve.java:419)
        at com.sun.tools.javac.comp.Resolve.isAccessible(Resolve.java:405)
        at com.sun.tools.javac.comp.Resolve.isAccessible(Resolve.java:365)
        at com.sun.tools.javac.comp.Resolve.selectBest(Resolve.java:1463)
        at com.sun.tools.javac.comp.Resolve.findMethodInScope(Resolve.java:1633)

        at com.sun.tools.javac.comp.Resolve.findMethod(Resolve.java:1725)
        at com.sun.tools.javac.comp.Resolve.findMethod(Resolve.java:1677)
        at com.sun.tools.javac.comp.Resolve$MethodReferenceLookupHelper.lookup(R
esolve.java:3192)
        at com.sun.tools.javac.comp.Resolve.lookupMethod(Resolve.java:3348)
        at com.sun.tools.javac.comp.Resolve.lookupMethod(Resolve.java:3333)
        at com.sun.tools.javac.comp.Resolve.getMemberReference(Resolve.java:2741
)
        at com.sun.tools.javac.comp.DeferredAttr$DeferredChecker.visitReference(
DeferredAttr.java:1183)
        at com.sun.tools.javac.tree.JCTree$JCMemberReference.accept(JCTree.java:
1973)
        at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
        at com.sun.tools.javac.comp.DeferredAttr$FilterScanner.scan(DeferredAttr
.java:913)
        at com.sun.tools.javac.comp.DeferredAttr.isDeferred(DeferredAttr.java:11
00)
        at com.sun.tools.javac.comp.Attr.attribArgs(Attr.java:669)
        at com.sun.tools.javac.comp.Attr.visitApply(Attr.java:1815)
        at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java
:1465)
        at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:575)
        at com.sun.tools.javac.comp.DeferredAttr.attribSpeculative(DeferredAttr.
java:387)
        at com.sun.tools.javac.comp.DeferredAttr$2.complete(DeferredAttr.java:28
0)
        at com.sun.tools.javac.comp.DeferredAttr$DeferredType.check(DeferredAttr
.java:246)
        at com.sun.tools.javac.comp.DeferredAttr$DeferredType.check(DeferredAttr
.java:233)
        at com.sun.tools.javac.comp.Resolve$MethodResultInfo.check(Resolve.java:
1008)
        at com.sun.tools.javac.comp.Resolve$4.checkArg(Resolve.java:835)
        at com.sun.tools.javac.comp.Resolve$AbstractMethodCheck.argumentsAccepta
ble(Resolve.java:735)
        at com.sun.tools.javac.comp.Resolve$4.argumentsAcceptable(Resolve.java:8
44)
        at com.sun.tools.javac.comp.Infer.instantiateMethod(Infer.java:162)
        at com.sun.tools.javac.comp.Resolve.rawInstantiate(Resolve.java:567)
        at com.sun.tools.javac.comp.Resolve.selectBest(Resolve.java:1446)
        at com.sun.tools.javac.comp.Resolve.findMethodInScope(Resolve.java:1633)

        at com.sun.tools.javac.comp.Resolve.findMethod(Resolve.java:1704)
        at com.sun.tools.javac.comp.Resolve.findMethod(Resolve.java:1677)
        at com.sun.tools.javac.comp.Resolve$9.doLookup(Resolve.java:2436)
        at com.sun.tools.javac.comp.Resolve$BasicLookupHelper.lookup(Resolve.jav
a:3097)
        at com.sun.tools.javac.comp.Resolve.lookupMethod(Resolve.java:3348)
        at com.sun.tools.javac.comp.Resolve.resolveQualifiedMethod(Resolve.java:
2433)
        at com.sun.tools.javac.comp.Resolve.resolveQualifiedMethod(Resolve.java:
2427)
        at com.sun.tools.javac.comp.Attr.selectSym(Attr.java:3395)
        at com.sun.tools.javac.comp.Attr.visitSelect(Attr.java:3277)
        at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:1897
)
        at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:575)
        at com.sun.tools.javac.comp.Attr.visitApply(Attr.java:1824)
        at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java
:1465)
        at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:575)
        at com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:624)
        at com.sun.tools.javac.comp.Attr.visitExec(Attr.java:1592)
        at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.j
ava:1296)
        at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:575)
        at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:644)
        at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:660)
        at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1123)
        at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:909)
        at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:575)
        at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:644)
        at com.sun.tools.javac.comp.Attr.visitMethodDef(Attr.java:1012)
        at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:778)
        at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:575)
        at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:644)
        at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:4363)
        at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4271)
        at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4200)
        at com.sun.tools.javac.comp.Attr.attrib(Attr.java:4175)
        at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:124
8)
        at com.sun.tools.javac.main.JavaCompiler.compile2(JavaCompiler.java:901)

        at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:860)
        at com.sun.tools.javac.main.Main.compile(Main.java:523)
        at com.sun.tools.javac.main.Main.compile(Main.java:381)
        at com.sun.tools.javac.main.Main.compile(Main.java:370)
        at com.sun.tools.javac.main.Main.compile(Main.java:361)
        at com.sun.tools.javac.Main.compile(Main.java:56)
        at com.sun.tools.javac.Main.main(Main.java:42)


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
See java files attachted to JDK-8133123
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
See the the CollectionConsumer class in the test case attached to JDK-8133123 for a working, equivalent alternative
Comments
This issue is duplicate of JDK-8073842
26-05-2016