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  1. JDK
  2. JDK-8157845

javac: AssertionError: isSubClass T

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    • x86_64
    • windows_7

      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

            fmatte Fairoz Matte
            webbuggrp Webbug Group
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              Created:
              Updated:
              Resolved: