ArrayIndexOutOfBoundsException in Parser due to static init block

issue eclipse-jdt#3506

Author: mpalat

org.eclipse.jdt.core.compiler.batch/src/org/eclipse/jdt/internal/compiler/parser/Parser.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2024 IBM Corporation and others.
+ * Copyright (c) 2000, 2025 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
@@ -3477,6 +3477,9 @@ private boolean isAFieldDeclarationInRecord() {
 				continue;
 			nestingTypeAndMethod = this.recordNestedMethodLevels.get(node);
 			if (nestingTypeAndMethod != null) { // record declaration is done yet
+				if (nestingTypeAndMethod[0] != this.nestedType
+					|| nestingTypeAndMethod[1] != this.nestedMethod[this.nestedType])
+					return false;
 				recordIndex = i;
 				break;
 			}

org.eclipse.jdt.core.tests.compiler/src/org/eclipse/jdt/core/tests/compiler/regression/RecordsRestrictedClassTest.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2019, 2024 IBM Corporation and others.
+ * Copyright (c) 2019, 2025 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -28,7 +28,7 @@ public class RecordsRestrictedClassTest extends AbstractRegressionTest {
 	static {
 //		TESTS_NUMBERS = new int [] { 40 };
 //		TESTS_RANGE = new int[] { 1, -1 };
-//		TESTS_NAMES = new String[] { "testIssue1641"};
+//		TESTS_NAMES = new String[] { "testBug3504_1"};
 	}
 
 	public static Class<?> testClass() {
@@ -9591,4 +9591,29 @@ public static void main(String [] args) {
 			},
 		"OK!");
 }
+public void testBug3504_1() {
+	runNegativeTest(
+			new String[] {
+				"X.java",
+				"""
+					class X {
+					       public static void main(String[] args) {
+					           record R(int x) {
+					           		static {
+					                	static int i = 0;
+					          		}
+					        	}
+					        	R r =  new R(100);
+					        	System.out.println(r.x());
+					    	}
+					}
+				"""
+			},
+			"----------\n" +
+			"1. ERROR in X.java (at line 5)\n" +
+			"	static int i = 0;\n" +
+			"	           ^\n" +
+			"Illegal modifier for the variable i; only final is permitted\n" +
+			"----------\n");
+}
 }