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  1. JDK
  2. JDK-4152665

javac accepts void type in array creation expression

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    • Subcomponent:
    • CPU:
      sparc
    • OS:
      solaris_2.5.1

      Description



      Name: ngC57085 Date: 06/26/98



      Compiler version "1.2beta4" (build JDK-1.2beta4-I)

      Java compiler crashes while trying to compile next test.
      This test also crash all previos compiler versions.
      An example and compiler diagnostics follow:
      -------------------------------------------------------
      class arr00509 {
          Object a = new void[1];
      }


      > uname -a
      SunOS novo35 5.5.1 Generic_103640-12 sun4m sparc SUNW,SPARCstation-20

      > javac arr00509.java
      sun.tools.java.CompilerError: codeValue
              at sun.tools.tree.NewArrayExpression.codeValue(Compiled Code)
              at sun.tools.tree.ConvertExpression.codeValue(Compiled Code)
              at sun.tools.tree.AssignExpression.code(Compiled Code)
              at sun.tools.tree.CommaExpression.code(Compiled Code)
              at sun.tools.tree.ExpressionStatement.code(Compiled Code)
              at sun.tools.javac.SourceMember.code(Compiled Code)
              at sun.tools.javac.SourceMember.code(Compiled Code)
              at sun.tools.javac.SourceClass.compileClass(Compiled Code)
              at sun.tools.javac.SourceClass.compile(Compiled Code)
              at sun.tools.javac.Main.compile(Compiled Code)
              at sun.tools.javac.Main.main(Compiled Code)
      arr00509.java:0: class arr00509:arr00509()@sun.tools.java.CompilerError: codeValue
      class arr00509{
      ^
      1 error

      -------------------------------------------------------

      Therewith javac normaly compile bogus array creation expression type
      of void[][]. This fact stay in contadictionary with JLS section 15.9 which state:
      "... that is a new array whose elements are of the type specified by the PrimitiveType or TypeName."
      The type void is neither PrimitiveType, nor TypeName JLS 4.2 & JLS 3.8
      The VM throws an exception while trying to execute bytecode produced
      by javac in this case.

      An programm example and VM diagnostics follow:
      -------------------------------------------------------
      public class arr00510 {

          public static void main(String[] args) {
              Object a = new void[2][2];
          }
      }

      > uname -a
      SunOS novo35 5.5.1 Generic_103640-12 sun4m sparc SUNW,SPARCstation-20
      >javac arr00510.java
      >
      > java -version
      java version "1.2beta4"
      Classic VM (build JDK-1.2beta4-I, green threads, sunwjit)
      > java arr00510
      Exception in thread "main" java.lang.ClassFormatError: arr00510 (Illegal Class name "[[V")
              at java.lang.ClassLoader.defineClass0(Native Method)
      at java.lang.ClassLoader.defineClass(Compiled Code)
      at java.security.SecureClassLoader.defineClass(Compiled Code)
      at java.net.URLClassLoader.defineClass(Compiled Code)
      at java.net.URLClassLoader.findClass(Compiled Code)
      at java.lang.ClassLoader.loadClass(Compiled Code)
      at java.lang.ClassLoader.loadClass(Compiled Code)

      -------------------------------------------------------


      ======================================================================

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            Assignee:
            tturnidgsunw Todd Turnidge (Inactive)
            Reporter:
            duke J. Duke (Inactive)
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