Error when minimizing with Google closure-compiler

https://github.com/google/closure-compiler
he.js: line 338, col 60, Expected an assignment or function call and instead saw an expression.
has(he, key) && (freeExports[key] = he[key]);

My guess would be something like this:

if (has(he, key)) {
freeExports[key] = he[key];
}

Start at line 338 of he.js and reproduce the reported error with Google Closure Compiler. Confirm the completed change by running the compiler successfully against he.js without the assignment-or-function-call warning.

Written by the indexing model from the issue text.