<rdar://problem/116355180>

Tried following:

static int absoluteValueForLegacyCJKAlogrithms(int value)
{
    // @counter-style algorithm works on absolute value, but the legacy
    // implementation works on the original value (and handles negative sign on
    // its own). Clamp to the signed int range before proceeding.
    if (UNLIKELY(value == std::numeric_limits<int>::min()))
        return std::numeric_limits<int>::max();
    else
        return std::abs(value);
}

and then 'return' modified like this:

return counterForSystemCJK(absoluteValueForLegacyCJKAlogrithms(value), simplifiedChineseInformalTable, Formality::Informal);

and then 'CSSCounterStyle::initialRepresentation' updated to have following as 'absoluteValue':

unsigned absoluteValue = value == std::numeric_limits<int>::min() ? static_cast<unsigned>(std::numeric_limits<int>::max()) + 1u : std::abs(value);

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Following does not fix the test case (at least running via JSFiddle).