optimizeImports() seemingly creates invalid source maps

[troncoso]

I originally posted this on stack overflow thinking I was doing something wrong: https://stackoverflow.com/questions/69548571/svelte-carbon-component-import-breaks-debugging

Bug according to the first answer, it looks like the optimizeImports() plugin is producing bad source maps. I've created a repo that reproduces the issue here:

https://github.com/troncoso/carbon-svelte-bug

As the README says, if you remove the call to optimizeImports(), then breakpoints work correctly. The stack overflow answer has in depth information on what is believed to be wrong

[metonym]

Released in v0.11.0, I rewrote the preprocessor from scratch. It now includes high-res source maps (via magic-string).