Can't Do FindAll in Views

<g:each var="num" in="${foos.findAll { it % 2 == 0 }}">
$

<br />
</g:each>

Gives the following error:

Error 500: $const$0
Servlet: default
URI: /Kimsal/foo/index
Exception Message: $const$0
Caused by: $const$0
Class: Unknown
At Line: [-1]
Code Snippet:

java.lang.NoSuchFieldError: $const$0
at Users_robert_dev_workspace_Kimsal_grails_app_views_foo_index_gsp$_run_closure1.doCall(Users_robert_dev_workspace_Kimsal_grails_app_views_foo_index_gsp:12)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

Line 12 of showSource is:

12: for(num in foos.findAll

) {