[BUG] Classes are compiled to put this before super() calls.

[trusktr]

I added my own support number based on ie:10, so it looks like this:

		    10: 0b1000000000000000000000000000010,

I wanted to leave classes alone, to compile those with Babel afterword.

It turns out, Buble is modifying the classes, and putting this before super() which turns into an error in Babel because this isn't allowed to be used before super(). The output look like this:

        constructor (options) {
            var this$1 = this;
            if ( options === void 0 ) options = {};

            super(options);

            // use options
        }

Oddly, this$1 is never used for anything. Not sure why Buble would put that there.

[trusktr]

I'm using rollup-plugin-buble. Could it be a problem there?

[adrianheine]

Can you give an example? I couldn't reproduce the issue.

[trusktr]

Dang, I should've forked my repo and posted it. Will do next time. I may get around to it while testing builds for browsers before next release of my project.

[adrianheine]

Please feel free to reopen if you see the issue again.