[QUESTION] Use of min_significant_digits with max_significant digits

[NicholasWMRitchie]

Question

I'd like to always write exactly three significant digits in the fractional part. It would seem that I need to include both min_significant_digits(...) and max_significant_digits(...).

    const FORMAT: u128 = lexical::format::STANDARD;
    OptionsBuilder::new()
        .max_significant_digits(NonZeroUsize::new(3))
        .min_significant_digits(NonZeroUsize::new(3))
        .build()
        .unwrap();
    lexical::to_string_with_options::<_, FORMAT>(val, &options)

However, this always fails with

---- algorithms::stage::test_stage stdout ----
thread 'algorithms::stage::test_stage' panicked at 'assertion failed: bytes.len() >= 20', C:\Users\nicho\.cargo\registry\src\github.com-1ecc6299db9ec823\lexical-write-float-0.8.5\src\algorithm.rs:807:5

What am I doing wrong? min_significant_digits(...) alone seems to work ok.