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  1. JDK
  2. JDK-8176355

AssertionError at com.sun.tools.javac.util.Assert.error(Assert.java:126)

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      FULL PRODUCT VERSION :
      java version "1.8.0_121"
      Java(TM) SE Runtime Environment (build 1.8.0_121-b13)
      Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)

      ADDITIONAL OS VERSION INFORMATION :
      Microsoft Windows [Version 10.0.14393]
      Ubuntu 12.04.5 LTS

      A DESCRIPTION OF THE PROBLEM :
      The source code attached below crashes the Java compiler.

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      Try to compile the source code attached below.

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      The compiler should not crash.
      ACTUAL -
      The compiler crashes.

      ERROR MESSAGES/STACK TRACES THAT OCCUR :
      An exception has occurred in the compiler (1.8.0_121). 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 your program and the following diagnostic in your report. Thank you.
      java.lang.AssertionError
              at com.sun.tools.javac.util.Assert.error(Assert.java:126)
              at com.sun.tools.javac.util.Assert.check(Assert.java:45)
              at com.sun.tools.javac.code.Types.functionalInterfaceBridges(Types.java:659)
              at com.sun.tools.javac.comp.LambdaToMethod$LambdaAnalyzerPreprocessor$TranslationContext.<init>(LambdaToMethod.java:1770)
              at com.sun.tools.javac.comp.LambdaToMethod$LambdaAnalyzerPreprocessor$LambdaTranslationContext.<init>(LambdaToMethod.java:1853)
              at com.sun.tools.javac.comp.LambdaToMethod$LambdaAnalyzerPreprocessor.analyzeLambda(LambdaToMethod.java:1337)
              at com.sun.tools.javac.comp.LambdaToMethod$LambdaAnalyzerPreprocessor.visitLambda(LambdaToMethod.java:1322)
              at com.sun.tools.javac.tree.JCTree$JCLambda.accept(JCTree.java:1624)
              at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
              at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
              at com.sun.tools.javac.tree.TreeTranslator.visitApply(TreeTranslator.java:275)
              at com.sun.tools.javac.comp.LambdaToMethod$LambdaAnalyzerPreprocessor.visitApply(LambdaToMethod.java:1208)
              at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1465)
              at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
              at com.sun.tools.javac.tree.TreeTranslator.visitExec(TreeTranslator.java:245)
              at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1296)
              at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
              at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
              at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:162)
              at com.sun.tools.javac.comp.LambdaToMethod$LambdaAnalyzerPreprocessor.visitBlock(LambdaToMethod.java:1231)
              at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:909)
              at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
              at com.sun.tools.javac.tree.TreeTranslator.visitMethodDef(TreeTranslator.java:145)
              at com.sun.tools.javac.comp.LambdaToMethod$LambdaAnalyzerPreprocessor.visitMethodDef(LambdaToMethod.java:1361)
              at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:778)
              at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
              at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
              at com.sun.tools.javac.tree.TreeTranslator.visitClassDef(TreeTranslator.java:134)
              at com.sun.tools.javac.comp.LambdaToMethod$LambdaAnalyzerPreprocessor.visitClassDef(LambdaToMethod.java:1270)
              at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:693)
              at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
              at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
              at com.sun.tools.javac.tree.TreeTranslator.visitClassDef(TreeTranslator.java:134)
              at com.sun.tools.javac.comp.LambdaToMethod$LambdaAnalyzerPreprocessor.visitClassDef(LambdaToMethod.java:1270)
              at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:693)
              at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
              at com.sun.tools.javac.comp.LambdaToMethod$LambdaAnalyzerPreprocessor.analyzeAndPreprocessClass(LambdaToMethod.java:1197)
              at com.sun.tools.javac.comp.LambdaToMethod$LambdaAnalyzerPreprocessor.access$300(LambdaToMethod.java:1148)
              at com.sun.tools.javac.comp.LambdaToMethod.visitClassDef(LambdaToMethod.java:232)
              at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:693)
              at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
              at com.sun.tools.javac.comp.LambdaToMethod.translate(LambdaToMethod.java:197)
              at com.sun.tools.javac.comp.LambdaToMethod.translate(LambdaToMethod.java:190)
              at com.sun.tools.javac.comp.LambdaToMethod.translateTopLevelClass(LambdaToMethod.java:217)
              at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1493)
              at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1356)
              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 ----------
      public class SSCCE {
          public static class Attribute<T> {
              public interface ChangeListener<TT, V> {
                  void changed(V newVal);
              }

              @FunctionalInterface
              public interface StringChangeListener<TT> extends ChangeListener<TT, String> {
                  void changed(String newVal);
              }

              public void addStringListener(StringChangeListener<T> listener) {
              }
          }

          public static abstract class Holder<T extends Holder<T>> {}

          public static class HolderImpl extends Holder<HolderImpl> {
              public HolderImpl() {
                  new Attribute().addStringListener(newVal -> System.out.println(newVal));
              }
          }
      }

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

      CUSTOMER SUBMITTED WORKAROUND :
      Avoid lambdas and FunctionalInterfaces.

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