Details

    • Type: Bug
    • Status: Closed
    • Priority: P4
    • Resolution: Duplicate
    • Affects Version/s: 8u25
    • Fix Version/s: 8u40
    • Component/s: tools
    • Subcomponent:
    • CPU:
      x86_64
    • OS:
      windows_7

      Description

      FULL PRODUCT VERSION :
      javac 1.8.0_25

      java version "1.8.0_25"
      Java(TM) SE Runtime Environment (build 1.8.0_25-b18)
      Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)

      ADDITIONAL OS VERSION INFORMATION :
      Microsoft Windows [Version 6.1.7601]

      A DESCRIPTION OF THE PROBLEM :
      The following java file causes javac to throw an NPE:

      import java.util.stream.Stream;

      public class JavacBug {
      public static void main(String[] args) {
      long r = Stream.empty().reduce(0L, (a, x) -> a + 1L, Long::sum);
      }
      }



      ERROR MESSAGES/STACK TRACES THAT OCCUR :

      java.lang.NullPointerException
              at com.sun.tools.javac.code.Types.isConvertible(Types.java:290)
              at com.sun.tools.javac.comp.Check.assertConvertible(Check.java:922)
              at com.sun.tools.javac.comp.Check.checkMethod(Check.java:876)
              at com.sun.tools.javac.comp.Attr.checkMethod(Attr.java:3838)
              at com.sun.tools.javac.comp.Attr.checkIdInternal(Attr.java:3615)
              at com.sun.tools.javac.comp.Attr.checkMethodIdInternal(Attr.java:3522)
              at com.sun.tools.javac.comp.Attr.checkMethodId(Attr.java:3501)
              at com.sun.tools.javac.comp.Attr.checkId(Attr.java:3488)
              at com.sun.tools.javac.comp.Attr.visitSelect(Attr.java:3370)
              at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:1897)
              at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:607)
              at com.sun.tools.javac.comp.Attr.visitApply(Attr.java:1843)
              at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1465)
              at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:607)
              at com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:649)
              at com.sun.tools.javac.comp.Attr.visitVarDef(Attr.java:1093)
              at com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:852)
              at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:607)
              at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:676)
              at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:692)
              at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1142)
              at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:909)
              at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:607)
              at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:676)
              at com.sun.tools.javac.comp.Attr.visitMethodDef(Attr.java:1035)
              at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:778)
              at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:607)
              at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:676)
              at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:4342)
              at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4252)
              at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4181)
              at com.sun.tools.javac.comp.Attr.attrib(Attr.java:4156)
              at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1248)
              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 ----------
      import java.util.stream.Stream;

      public class JavacBug {
      public static void main(String[] args) {
      long r = Stream.empty().reduce(0L, (a, x) -> a + 1L, Long::sum);
      }
      }
      ---------- END SOURCE ----------

      CUSTOMER SUBMITTED WORKAROUND :
      Declaring r as Long or explicitly specifying types in BiFunction fixes the problem

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              • Assignee:
                Unassigned
                Reporter:
                webbuggrp Webbug Group
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                Dates

                • Created:
                  Updated:
                  Resolved: