Hi, looking into Class::methodToString I've found some changes done into it recently in JDK 11 repository.
Currently the method looks like this: private String methodToString(String name, Class<?>[] argTypes) { StringBuilder sb = new StringBuilder(); sb.append(getName() + "." + name + "("); if (argTypes != null) { Stream.of(argTypes).map(c -> {return (c == null) ? "null" : c.getName();}). collect(Collectors.joining(",")); } sb.append(")"); return sb.toString(); } Here result of Stream.collect() is ignored, i. e. even when condition argTypes != null is true nothing is appended to sb. It seems in this case we either don’t need this `if` branch or need to append to sb. Am I missing something? Kind regards, Sergey Tsypanov