IDEA-91844 Groovy: "Method may be static" inspection doesn't report methods which have references to static members from other classes

plugins/groovy/src/org/jetbrains/plugins/groovy/codeInspection/declaration/GrMethodMayBeStaticInspection.java

@@ -130,6 +130,7 @@ public class GrMethodMayBeStaticInspection extends BaseInspection {
 
         GroovyPsiElement resolveContext = result.getCurrentFileResolveContext();
         if (resolveContext != null) return;
+        if (element instanceof PsiClass && ((PsiClass)element).getContainingClass() == null) return;
         if (element instanceof PsiMember && !((PsiMember)element).hasModifierProperty(PsiModifier.STATIC)) {
           myMay = false;
         }

plugins/groovy/test/org/jetbrains/plugins/groovy/inspections/GrMethodMayBeStaticTest.groovy

@@ -70,4 +70,23 @@ class A {
     myFixture.enableInspections(GrMethodMayBeStaticInspection)
     myFixture.checkHighlighting(true, false, false)
   }
+
+  void testOtherClasses() {
+    myFixture.with {
+      addFileToProject('Fooo.groovy', '''\
+class Fooo {
+  static def foo() {}
+}
+''')
+      configureByText('_.groovy', '''\
+class Bar {
+  static def abc()
+  def bar() {
+    abc()
+    Fooo.foo()
+  }
+}
+''')
+    }
+  }
 }