@Test public void tag_span_ignoredErrorParsing() {

  when(parseValue.apply(input, context)).thenThrow(new Error());
  tag.tag(input, span);
  verify(span).context();
  verify(span).isNoop();
  verify(parseValue).apply(input, context);
  verifyNoMoreInteractions(parseValue); // doesn't parse twice
  verifyNoMoreInteractions(span);
}