Code sample:

import java.util.List;

public class Demo {

    void x(List<? extends StringTemplate.Processor<String,
RuntimeException>> list) {
        list.get(0)."";
    }
}

Output (build 22-ea+7-489):
java: An exception has occurred in the compiler (22-ea). 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: java.lang.AssertionError: <captured wildcard>.process
java: at jdk.compiler/com.sun.tools.javac.util.Assert.error(Assert.java:162)
java: at jdk.compiler/com.sun.tools.javac.code.Symbol$MethodSymbol.<init>(Symbol.java:1942)
java: at jdk.compiler/com.sun.tools.javac.code.Symbol$MethodSymbol$1.<init>(Symbol.java:1948)
java: at jdk.compiler/com.sun.tools.javac.code.Symbol$MethodSymbol.clone(Symbol.java:1948)
java: at jdk.compiler/com.sun.tools.javac.code.Symbol$MethodSymbol.clone(Symbol.java:1918)
java: at jdk.compiler/com.sun.tools.javac.jvm.Gen.binaryQualifier(Gen.java:265)
java: at jdk.compiler/com.sun.tools.javac.jvm.Gen.visitSelect(Gen.java:2388)
java: at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:2581)
java: at jdk.compiler/com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:885)
java: at jdk.compiler/com.sun.tools.javac.jvm.Gen.visitApply(Gen.java:1921)