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https://issues.apache.org/jira/browse/GROOVY-7996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17173632#comment-17173632
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Paul King commented on GROOVY-7996:
-----------------------------------

I know this was a while ago, but in hindsight, I probably would have placed the 
methodMissing/get/set part of the fix into its own type checker extension, 
perhaps {{MopAwareChecker}}. That part of the current "fix" doesn't work for 
instance outside closures, e.g.:
{code:java}
@groovy.transform.CompileStatic
class Foo {
    int a = 40
    def main() {
        a + (int)b
    }
    def propertyMissing(String name) {
        2
    }
}
def foo = new Foo()
assert foo.main() == 42
{code}
Nor for method calls.

> Using with method with a closure that references a protected property 
> produces ClassCastException
> -------------------------------------------------------------------------------------------------
>
>                 Key: GROOVY-7996
>                 URL: https://issues.apache.org/jira/browse/GROOVY-7996
>             Project: Groovy
>          Issue Type: Bug
>    Affects Versions: 2.4.7
>            Reporter: Graeme Rocher
>            Priority: Major
>             Fix For: 2.5.9, 3.0.0-rc-2
>
>          Time Spent: 2h 10m
>  Remaining Estimate: 0h
>
> The following example:
> {code}
> class Foo {
>     Object propertyMissing(String name) {
>          return "stuff"
>     }
>     
>     void build(Closure callable) {
>          this.with(callable)
>     }
> }
> @groovy.transform.CompileStatic
> class Bar {
>     protected List bar = []
>     
>     boolean doStuff() {
>         Foo foo = new Foo()
>         foo.build {
>            return bar.isEmpty() 
>         }
>     }
> }
> new Bar().doStuff()
> {code}
> Produces 
> {code}
> java.lang.ClassCastException: java.lang.String cannot be cast to 
> java.util.List
>       at Bar$_doStuff_closure1.doCall(ConsoleScript3:19)
>       at Bar$_doStuff_closure1.call(ConsoleScript3)
>       at 
> org.codehaus.groovy.runtime.DefaultGroovyMethods.with(DefaultGroovyMethods.java:242)
>       at Bar.doStuff(ConsoleScript3:18)
>       at Ba
> {code}
> The equivalent code without CompileStatic prints:
> {code}
> Result: false
> {code}
> The behaviour of both should be he same IMO



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