Review

Iterator.next() is invoked without prior check of hasNext().

• missing/condition/value_or_state

com/google/javascript/jscomp/JSModuleGraph.java

getDeepestCommonDependencyInclusive(Collection)

class JSModuleGraph {
  /** Returns the deepest common dependency of the given modules. */
  public JSModule getDeepestCommonDependencyInclusive(
      Collection<JSModule> modules) {
    Iterator<JSModule> iter = modules.iterator();
    JSModule dep = iter.next();
    while (iter.hasNext()) {
      dep = getDeepestCommonDependencyInclusive(dep, iter.next());
    }
    return dep;
  }

}