Miss-compile: Uncaught SyntaxError: Unexpected token default

This is a regression since 1.9.854.

This:

compiles to

Which results in Uncaught SyntaxError: Unexpected token default at runtime.

The compiler itself is also affected:
https://github.com/clojure/clojurescript/blob/master/src/main/clojure/cljs/compiler.cljc#L500

When removing all the requires in the test case, it compiles fine.

Attaching a test case.