DataFlowInspection: unwrap parentheses when checking if redundant assignment is inside class initializer

java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/DataFlowInspectionBase.java

@@ -306,6 +306,7 @@ public class DataFlowInspectionBase extends AbstractBaseJavaLocalInspectionTool
                                           HashSet<PsiElement> reportedAnchors,
                                           DataFlowInstructionVisitor visitor) {
     visitor.sameValueAssignments().forEach(expr -> {
+      expr = PsiUtil.skipParenthesizedExprDown(expr);
       if(!reportedAnchors.add(expr)) return;
       PsiAssignmentExpression assignment = PsiTreeUtil.getParentOfType(expr, PsiAssignmentExpression.class);
       PsiElement context = PsiTreeUtil.getParentOfType(expr, PsiForStatement.class, PsiClassInitializer.class);

java/java-tests/testData/inspection/dataFlow/fixture/RedundantAssignment.java

@@ -39,4 +39,14 @@ public class RedundantAssignment {
       <warning descr="Variable is already assigned to this value">a</warning> = b;
     }
   }
+
+  class X {
+    int a;
+    int b;
+
+    {
+      a = 0;
+      ((b)) = 0;
+    }
+  }
 }