Upd
Running debug for GWT project created by IntelliJ Idea new-project-wizard
Running GPE launcher for GWT-2.6.x version.
Exception in thread "main" java.lang.NoSuchMethodError: com.google.gwt.dev.javac.CompilationStateBuilder.init(Lcom/google/gwt/core/ext/TreeLogger;Ljava/io/File;)V
at com.google.gwt.dev.DevModeBase.doStartup(DevModeBase.java:943)
at com.google.gwt.dev.DevMode.doStartup(DevMode.java:498)
at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1097)
at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:863)
at com.google.gwt.dev.DevMode.main(DevMode.java:379)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)