[SOLVED] In JS, how to differentiate PureScript type from an object?

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So, I figured out the algorithm, but I stumbled upon what seems like a compiler bug.

The solution is basically this:

export const canonicalizeTypedProps = function(props) {
    for (var k in props) {
        if (!props.hasOwnProperty(k)) // skip <prototype> properties
            continue;
        if (props[k] instanceof Array)
            continue; // TODO: recurse into
        if (props[k].constructor.name !== 'Object')
            props[k] = show_(props[k]);
    }
    return props;
}

Here the show_ is a re-export of show, like this (I haven’t found a way to make it visible to the JS without re-declaring, suggestions are welcome):

show_ :: ∀ a. Show a => a -> String
show_ = show

Now, the problem is, show_ doesn’t work. Calling it upon “showable” property just gives undefined. More over, if I spago bundle-app and check resulting index.js for the string to produce, it turns out there’s none, so it doesn’t seem like it even produces a working code for show_.

Reported… But as far as the question concerned, marking as SOLVED.