The following program crashes during annotation processing with javac 9-ea+149:

===
import java.util.Set;
import javax.annotation.processing.AbstractProcessor;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.SupportedAnnotationTypes;
import javax.lang.model.SourceVersion;
import javax.lang.model.element.TypeElement;

@SupportedAnnotationTypes("*")
public class SimpleProcessor extends AbstractProcessor {

  @Override
  public SourceVersion getSupportedSourceVersion() {
    return SourceVersion.latestSupported();
  }

  @Override
  public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
    return false;
  }
}
===

===
class Test<Override> {
  Test(@Override String foo) {}
}
===

$ javac SimpleProcessor.java
$ javac -processor SimpleProcessor Test.java
java.lang.AssertionError: Only on ClassSymbol
        at jdk.compiler/com.sun.tools.javac.util.Assert.error(Assert.java:162)
        at jdk.compiler/com.sun.tools.javac.code.Symbol$TypeSymbol.getAnnotationTypeMetadata(Symbol.java:811)
        at jdk.compiler/com.sun.tools.javac.comp.Check.getAttributeTargetAttribute(Check.java:3140)
        at jdk.compiler/com.sun.tools.javac.comp.Check.annotationApplicable(Check.java:3074)
        at jdk.compiler/com.sun.tools.javac.comp.Check.validateAnnotation(Check.java:2824)
        at jdk.compiler/com.sun.tools.javac.comp.Check.validateAnnotations(Check.java:2809)
        at jdk.compiler/com.sun.tools.javac.comp.Annotate.lambda$annotateLater$1(Annotate.java:258)
        at jdk.compiler/com.sun.tools.javac.comp.Annotate.flush(Annotate.java:186)
        at jdk.compiler/com.sun.tools.javac.comp.Annotate.unblockAnnotations(Annotate.java:134)
        at jdk.compiler/com.sun.tools.javac.comp.Enter.complete(Enter.java:591)
        at jdk.compiler/com.sun.tools.javac.comp.Enter.main(Enter.java:546)
        at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.enterTrees(JavaCompiler.java:1069)
        at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:940)
        at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:307)
        at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:160)
        at jdk.compiler/com.sun.tools.javac.Main.compile(Main.java:55)
        at jdk.compiler/com.sun.tools.javac.Main.main(Main.java:41)