LGTM with one nit.
http://gwt-code-reviews.appspot.com/154811/diff/1/4 File dev/core/src/com/google/gwt/dev/jjs/impl/gflow/DataflowOptimizer.java (right): http://gwt-code-reviews.appspot.com/154811/diff/1/4#newcode102 Line 102: throw new RuntimeException("Error optimizing: " + methodName, t); Please catch the specific exceptions, not Throwable. Also, rethrow an InternalCompilerException instead of a generic RuntimeException. http://gwt-code-reviews.appspot.com/154811 -- http://groups.google.com/group/Google-Web-Toolkit-Contributors
