In some circumstances, calling symbol.hasAnnotation incorrectly returns false, but returns the correct thing if symbol.getAnnotations is called beforehand.

Example program showing bug:

package test
import scala.reflect.runtime._

object Test extends App {
val cx = classOf[X];
val symbol = universe.runtimeMirror(cx.getClassLoader).classSymbol(cx);
val ca = classOf[scala.deprecated];
val a=universe.runtimeMirror(ca.getClassLoader).classSymbol(ca);
println(symbol.hasAnnotation(a));
symbol.getAnnotations;
println(symbol.hasAnnotation(a))
}

@scala.deprecated class X

This prints out "false" then "true".

I note that the symbol.getAnnotations function calls initialize, then returns the annotations internal field, while hasAnnotation just uses the internal field directly.

It all works correctly when I run it from the REPL instead of compiling directly.

[ Sorry for entering it is a blocker when there is a workaround - the web form didn't let me change it. ]