GWT rebinder: TypeOracle.getType("foo.Foo") returns null: how to get the real error?

Question

I have a class Foo:

package foo;
import bar.Bar; // Bar is super-sourced badly
public class Foo {
    private Bar b = new Bar(); // no-arg constructor of Bar doesn't exist
    ...
}

When I have a rebind that does:

JClassType t = TypeOrace.getType("foo.Foo"); // return null

That returns null, even though "foo.Foo" exists. The real problem is that Bar line inside Foo.java. Is there anyway to get the real error instead of null? So something that contains the word Bar or the line private Bar b = new Bar(); or a line number?

Answer 1

As suggested by tbroyer as a comment.

Configure the gwt-maven-plugin to failOnError:

<plugin>
  <groupId>net.ltgt.gwt.maven</groupId>
  <artifactId>gwt-maven-plugin</artifactId>
  <configuration>
    <failOnError>true</failOnError>
  </configuration>
</plugin>

And one of the errors in the output list will explain the problem.