ShortResponseBody$ReplyingServer could simply ignore requests that don't target the expected URI (or reply with 500), instead of simply asserting:

=======================================================

                    String query = uriPath.getRawQuery();
                    if (query == null) {
                        out.println("Request headers: [" + headers + "]");
+ continue;
                    }
                    assert query != null : "null query for uriPath: " + uriPath;

=======================================================

SSLVariableLengthServer: got connection PlainVariableLengthServer: got connection PRI *
Request headers: [HTTP/2.0

]
Unexpected exception in server: java.lang.AssertionError: null query for uriPath: *
java.lang.AssertionError: null query for uriPath: *
at ShortResponseBody$ReplyingServer.run(ShortResponseBody.java:507)