GWT 2.8 - Super Dev Mode throws NoClassDefFoundError

I have a GWT 2.8.2 project and downloaded the current plugin's snapshot from https://storage.googleapis.com/gwt-eclipse-plugin/v3/snapshot.

My versions:
- GWT 2.8.2 SDK - 2.8.0.201803211650
- GWT Eclipse Plugin - 3.0.0.201803211650

My project refers to these dependencies in its POM:

```xml

com.google.gwt
gwt-user
2.8.2
provided

com.google.web.bindery
requestfactory-server
2.8.2

```

Now, when I try to run Super Dev mode for this project, I get an error:

```
Exception in thread "main" java.lang.NoClassDefFoundError: cern/colt/map/OpenIntObjectHashMap
at com.google.gwt.dev.util.collect.IntMultimap.(IntMultimap.java:28)
at com.google.gwt.dev.StringAnalyzableTypeEnvironment.(StringAnalyzableTypeEnvironment.java:68)
at com.google.gwt.dev.MinimalRebuildCache.(MinimalRebuildCache.java:192)
at com.google.gwt.dev.CompilerContext$Builder.(CompilerContext.java:37)
at com.google.gwt.dev.DevModeBase.(DevModeBase.java:636)
at com.google.gwt.dev.DevMode.(DevMode.java:463)
at com.google.gwt.dev.DevMode.main(DevMode.java:430)
Caused by: java.lang.ClassNotFoundException: cern.colt.map.OpenIntObjectHashMap
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 7 more
```

It looks like the eclipse plugin correctly adds gwt-dev.jar to the classpath, but not any of its required dependencies...


Start by reproducing Super Dev Mode with the versions and Maven dependencies shown in the issue, then inspect how the Eclipse plugin builds the runtime classpath for gwt-dev.jar. Trace the missing cern.colt.map.OpenIntObjectHashMap dependency from the provided stack trace; done means Super Dev Mode starts without this NoClassDefFoundError.

Escrito por el modelo de indexación a partir del texto del issue.