SystemJS callback module param conflicts with any module declaration

[edoardocavazza]

• Rollup Version:1.11.3
• Operating System (or Browser): MacOS
• Node Version: v12.1.0

How Do We Reproduce?

https://rollupjs.org/repl?version=1.11.3&shareable=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

Expected Behavior

The module and exports parameters of the System.register callback should be unique identifiers.

Actual Behavior

If an imported module has a declaration named module, it conflicts with the SystemJS reference.

[lukastaegert]

Thanks for the issue. This one took a little longer as I went for a much more general solution, check out #2880.