[wgsl-in]/[glsl-out] Bug with vec types and modulo operator

[superdump]

I had some code in wgsl like this:

    let rgb = clamp(
        abs(
            ((hue * 6.0 + vec3<f32>(0.0, 4.0, 2.0)) % 6.0 - 3.0
        ) - 1.0,
        vec3<f32>(0.0),
        vec3<f32>(1.0)
    );

and hit this when trying to run on WebGL2:

Internal error in VERTEX shader: ERROR: 0:244: '%' : wrong operand types - no operation '%' exists that takes a left-hand operand of type 'highp 3-component vector of float' and a right operand of type 'const 3-component vector of float' (or there is no acceptable conversion)

It's specifically the calculated vec3 % constant vec3 that seems to be the problem. I can work around it by individually calculating each component, but I think this is a bug somewhere, perhaps in glsl-out?