Consider this code:
```
public class Test {
    interface Parent { int a();}

    static class Child implements Parent {
        public int a() {
            return 1;
        }
    }

    record Rec<T, U>(T a, U b) {}

    private static <T extends Parent, U extends Parent> boolean test(Rec<T, U> p) {
        boolean res;
        switch (p) {
            case Rec(Child a, var b) -> res = a.a() + b.a() == 2; //line A
            default -> res = false;
        }
        return res;
    }

    public static void main(String argv[]) {
        System.out.println(test(new Rec<>(new Child(), new Child())));
    }
}
```

javac crashes on this code with:
```
$ javac /tmp/Test.java
An exception has occurred in the compiler (23-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.ClassCastException: class com.sun.tools.javac.code.Symbol$TypeVariableSymbol cannot be cast to class com.sun.tools.javac.code.Symbol$ClassSymbol (com.sun.tools.javac.code.Symbol$TypeVariableSymbol and com.sun.tools.javac.code.Symbol$ClassSymbol are in module jdk.compiler of loader 'app')
        at jdk.compiler/com.sun.tools.javac.comp.Flow$AliveAnalyzer.expandGenericPatterns(Flow.java:1166)
        at jdk.compiler/com.sun.tools.javac.comp.Flow$AliveAnalyzer.expandGenericPatterns(Flow.java:1155)
        at jdk.compiler/com.sun.tools.javac.comp.Flow$AliveAnalyzer.exhausts(Flow.java:839)
        at jdk.compiler/com.sun.tools.javac.comp.Flow$AliveAnalyzer.visitSwitch(Flow.java:726)
        at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCSwitch.accept(JCTree.java:1299)
        at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:50)
        at jdk.compiler/com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:463)
        at jdk.compiler/com.sun.tools.javac.comp.Flow$AliveAnalyzer.scanStat(Flow.java:546)
        at jdk.compiler/com.sun.tools.javac.comp.Flow$AliveAnalyzer.scanStats(Flow.java:554)
        at jdk.compiler/com.sun.tools.javac.comp.Flow$AliveAnalyzer.visitBlock(Flow.java:640)
        at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1092)
        at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:50)
        at jdk.compiler/com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:463)
        at jdk.compiler/com.sun.tools.javac.comp.Flow$AliveAnalyzer.scanStat(Flow.java:546)
        at jdk.compiler/com.sun.tools.javac.comp.Flow$AliveAnalyzer.visitMethodDef(Flow.java:604)
        at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:916)
        at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:50)
        at jdk.compiler/com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:463)
        at jdk.compiler/com.sun.tools.javac.comp.Flow$AliveAnalyzer.visitClassDef(Flow.java:584)
        at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:814)
        at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:50)
        at jdk.compiler/com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:463)
        at jdk.compiler/com.sun.tools.javac.comp.Flow$AliveAnalyzer.analyzeTree(Flow.java:1337)
        at jdk.compiler/com.sun.tools.javac.comp.Flow$AliveAnalyzer.analyzeTree(Flow.java:1329)
        at jdk.compiler/com.sun.tools.javac.comp.Flow.analyzeTree(Flow.java:230)
        at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1418)
        at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1392)
        at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:977)
        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: .../javac.20240305_131737.args
```

Introduced by: JDK-8325215