Consider this code:
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public class T9999999 {
    switch (0) { default: }
}
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When trying to compile this, javac crashes:

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$ .../jdk-22/bin/javac -XDdev /tmp/T9999999.java
/tmp/T9999999.java:2: error: switch expression does not have any result expressions
    switch (0) { default: } f;
    ^
1 error
An exception has occurred in the compiler (22.0.1-internal). Please file a bug against the Java compiler via the Java bug reporting page (https://bugreport.java.com) after checking the Bug Database (https://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: Unexpected tree: switch (0) {
default:

} with kind: SWITCH_EXPRESSION within: switch (0) {
default:

} with kind: SWITCH_EXPRESSION
        at jdk.compiler/com.sun.tools.javac.util.Assert.error(Assert.java:162)
        at jdk.compiler/com.sun.tools.javac.comp.Attr$TypeAnnotationsValidator.validateAnnotatedType(Attr.java:5881)
        at jdk.compiler/com.sun.tools.javac.comp.Attr$TypeAnnotationsValidator.visitVarDef(Attr.java:5727)
        at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:1022)
        at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:50)
        at jdk.compiler/com.sun.tools.javac.comp.Attr$TypeAnnotationsValidator.visitClassDef(Attr.java:5780)
        at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:814)
        at jdk.compiler/com.sun.tools.javac.comp.Attr.validateTypeAnnotations(Attr.java:5677)
        at jdk.compiler/com.sun.tools.javac.code.TypeAnnotations.lambda$validateTypeAnnotationsSignatures$1(TypeAnnotations.java:144)
        at jdk.compiler/com.sun.tools.javac.comp.Annotate.flush(Annotate.java:200)
        at jdk.compiler/com.sun.tools.javac.comp.Annotate.unblockAnnotations(Annotate.java:144)
        at jdk.compiler/com.sun.tools.javac.comp.Annotate.enterDone(Annotate.java:157)
        at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.enterDone(JavaCompiler.java:1827)
        at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.enterTrees(JavaCompiler.java:1081)
        at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:947)
        at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:319)
        at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:178)
        at jdk.compiler/com.sun.tools.javac.Main.compile(Main.java:66)
        at jdk.compiler/com.sun.tools.javac.Main.main(Main.java:52)
printing javac parameters to: /home/jlahoda/src/jdk/jdk/javac.20240809_163551.args
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