can be final: accept field initialized with this qualifier

java/java-analysis-impl/src/com/intellij/codeInspection/reference/RefFieldImpl.java

@@ -60,8 +60,9 @@ public class RefFieldImpl extends RefJavaElementImpl implements RefField {
 
     if (forWriting && expressionFrom != null) {
       PsiClassInitializer initializer = PsiTreeUtil.getParentOfType(expressionFrom, PsiClassInitializer.class);
-      if (initializer != null) {
-        if (initializer.getParent() instanceof PsiClass && psiFrom == initializer.getParent() && !expressionFrom.isQualified()) {
+      if (initializer != null && initializer.getParent() instanceof PsiClass && psiFrom == initializer.getParent()) {
+        PsiExpression qualifierExpression = expressionFrom.getQualifierExpression();
+        if (qualifierExpression == null || qualifierExpression instanceof PsiThisExpression && ((PsiThisExpression)qualifierExpression).getQualifier() == null) {
           referencedFromClassInitializer = true;
         }
       }

java/java-tests/testData/inspection/canBeFinal/fieldInitializedInClassInitializer/expected.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<problems>
+  <problem>
+    <file>Test.java</file>
+    <line>2</line>
+    <description>Declaration can have final modifier</description>
+  </problem>
+</problems>

java/java-tests/testData/inspection/canBeFinal/fieldInitializedInClassInitializer/src/Test.java

@@ -0,0 +1,10 @@
+final class G {
+    private Object foo;
+    {
+        this.foo = "";
+    }
+
+    void fooBar() {
+        System.out.println(foo);
+    }
+}

java/java-tests/testSrc/com/intellij/codeInspection/CanBeFinalTest.java

@@ -162,4 +162,8 @@ public class CanBeFinalTest extends InspectionTestCase {
 
     doTest();
   }
+
+  public void testfieldInitializedInClassInitializer() throws Exception {
+    doTest();
+  }
 }