core: fix resolving the instance field in the 2nd and more nested inner class

jadx-core/src/main/java/jadx/core/codegen/InsnGen.java

@@ -129,8 +129,16 @@ public class InsnGen {
 	}
 
 	private void instanceField(CodeWriter code, FieldInfo field, InsnArg arg) throws CodegenException {
-		FieldNode fieldNode = mth.getParentClass().searchField(field);
-		if (fieldNode != null) {
+		ClassNode pCls = mth.getParentClass();
+		FieldNode fieldNode = pCls.searchField(field);
+
+		while ((fieldNode == null) 
+					&& (pCls.getParentClass() != pCls) && (pCls.getParentClass() != null))
+		{
+			pCls = pCls.getParentClass();
+			fieldNode = pCls.searchField(field);
+		}
+ 		if (fieldNode != null) {
 			FieldReplaceAttr replace = fieldNode.get(AType.FIELD_REPLACE);
 			if (replace != null) {
 				FieldInfo info = replace.getFieldInfo();

jadx-samples/src/main/java/jadx/samples/TestInner3.java

+package jadx.samples;
+
+public class TestInner3 extends AbstractTest {
+
+	private String i0;
+
+	public class A {
+		
+		protected String a;
+		
+		public A() {
+			a="";
+		}
+
+		public String a() {
+			return "";
+		}
+	}
+
+	public class I0 {
+		private String i0;
+		private String i1;
+
+		public class I1 {
+			private String i0;
+			private String i1;
+			private String i2;
+
+			public I1() {
+				TestInner3.this.i0 = "i0";
+				I0.this.i0 = "i1";
+				I0.this.i1 = "i2";
+
+				i0 = "i0";
+				i1 = "i1";
+				i2 = "i2";
+			}
+
+			public String i() {
+
+				String result = TestInner3.this.i0 + I0.this.i0 + I0.this.i1 + i0 + i1 + i2;
+				
+				A a = new A() {
+
+					public String a() {
+						TestInner3.this.i0 = "i1";
+						I0.this.i0 = "i2";
+						I0.this.i1 = "i3";
+						I1.this.i0 = "i1";
+						I1.this.i1 = "i2";
+						I1.this.i2 = "i3";
+						a = "a";
+
+						return TestInner3.this.i0 + I0.this.i0 + I0.this.i1 + I1.this.i0 + I1.this.i1 + I1.this.i2 + a;
+					}
+				};
+
+				return result + a.a();
+			}
+		}
+
+		public I0() {
+			TestInner3.this.i0 = "i-";
+			i0 = "i0";
+			i1 = "i1";
+		}
+
+		public String i() {
+			String result = TestInner3.this.i0 + i0 + i1;
+			return result + (new I1()).i();
+		}
+	}
+
+	@Override
+	public boolean testRun() throws Exception {
+		assertTrue((new I0()).i().equals("i-i0i1i0i1i2i0i1i2i1i2i3i1i2i3a"));
+		assertTrue(i0.equals("i1"));
+
+		return true;
+	}
+
+	public static void main(String[] args) throws Exception {
+		new TestInner2().testRun();
+	}
+
+}