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  1. JDK
  2. JDK-8268896

Parenthesized pattern is not guarded by source level check

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: P3
    • Resolution: Fixed
    • Affects Version/s: 17
    • Fix Version/s: 17
    • Component/s: tools
    • Subcomponent:
    • Resolved In Build:
      b28

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        Description

        Consider code like:
        ---
        public class Test {
            public void test(Integer i) {
                switch (i) {
                    case (Integer ii): break;
                }
            }
        }
        ---

        Compiling it leads to:
        ---
        $ javac Test.java
        An exception has occurred in the compiler (17-internal). 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, the following diagnostic, and the parameters passed to the Java compiler in your report. Thank you.
        java.lang.AssertionError
                at jdk.compiler/com.sun.tools.javac.util.Assert.error(Assert.java:155)
                at jdk.compiler/com.sun.tools.javac.util.Assert.check(Assert.java:46)
                at jdk.compiler/com.sun.tools.javac.comp.TransPatterns.handleSwitch(TransPatterns.java:275)
                at jdk.compiler/com.sun.tools.javac.comp.TransPatterns.visitSwitch(TransPatterns.java:258)
                at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCSwitch.accept(JCTree.java:1294)
        ---

        The cause is that the source level/preview check is not being done on the parenthesized pattern in this case.

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                Assignee:
                jlahoda Jan Lahoda
                Reporter:
                jlahoda Jan Lahoda
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                  Created:
                  Updated:
                  Resolved: