    void emptyHeaderNameNotAllowed() {
        assertThatThrownBy(() -> newEmptyHeaders().add("", "foo"))
                .isInstanceOf(IllegalArgumentException.class)
                .hasMessageContaining("malformed header name: <EMPTY>");
    }
The software constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.