Fix GrailsCompileStatic for validateable classes with an inner class. Fixes #10808

Author: jameskleeh

grails-core/src/main/groovy/org/grails/compiler/ValidateableTypeCheckingExtension.groovy

@@ -41,6 +41,8 @@ class ValidateableTypeCheckingExtension extends TypeCheckingDSL {
                     constraintsClosureCode = constraintsProperty.initialExpression.code
                 }
                 constraintsProperty.initialExpression.code = new EmptyStatement()
+            } else {
+                newScope()
             }
         }
 

grails-test-suite-uber/src/test/groovy/grails/compiler/GrailsCompileStaticCompilationErrorsSpec.groovy

@@ -183,6 +183,35 @@ class SomeClass implements grails.validation.Validateable {
         name matches: /[A-Z].*/
     }
 }
+''')
+        then: 'no errors are thrown'
+        c
+    }
+
+    @Issue('GRAILS-11242')
+    void 'Test compiling Validateable with inner class'() {
+        given:
+        def gcl = new GroovyClassLoader()
+
+        when: 'a class marked with @GrailsCompileStatic invokes dynamic finders on a non-domain class inside of a method marked with TypeCheckingMode.SKIP'
+        def c = gcl.parseClass('''
+package grails.compiler
+
+import groovy.transform.TypeCheckingMode
+
+@GrailsCompileStatic
+class SomeClass implements grails.validation.Validateable {
+
+    enum TestKind {
+        BIG,
+        SMALL
+    }
+    
+    String name
+    static constraints = {
+        name matches: /[A-Z].*/
+    }
+}
 ''')
         then: 'no errors are thrown'
         c