core: fix wildcard signature processing

jadx-core/src/main/java/jadx/core/dex/instructions/args/ArgType.java

@@ -174,7 +174,7 @@ public abstract class ArgType {
 		private final int bounds;
 
 		public WildcardType(ArgType obj, int bound) {
-			super(obj.getObject());
+			super(ArgType.OBJECT.getObject());
 			this.type = obj;
 			this.bounds = bound;
 		}
@@ -205,7 +205,8 @@ public abstract class ArgType {
 		@Override
 		boolean internalEquals(Object obj) {
 			return super.internalEquals(obj)
-					&& bounds == ((WildcardType) obj).bounds;
+					&& bounds == ((WildcardType) obj).bounds
+					&& type.equals(((WildcardType) obj).type);
 		}
 
 		@Override
@@ -213,7 +214,7 @@ public abstract class ArgType {
 			if (bounds == 0) {
 				return "?";
 			}
-			return "? " + (bounds == -1 ? "super" : "extends") + " " + super.toString();
+			return "? " + (bounds == -1 ? "super" : "extends") + " " + type.toString();
 		}
 	}
 

jadx-core/src/main/java/jadx/core/dex/nodes/parser/SignatureParser.java

@@ -23,9 +23,9 @@ public class SignatureParser {
 
 	public SignatureParser(String signature) {
 		sign = signature;
+		end = sign.length();
 		pos = -1;
 		mark = 0;
-		end = sign.length();
 	}
 
 	@SuppressWarnings("unchecked")

jadx-core/src/test/java/jadx/api/InternalJadxTest.java

@@ -71,6 +71,7 @@ public abstract class InternalJadxTest {
 			assertFalse(cls.getAttributes().contains(AttributeFlag.INCONSISTENT_CODE));
 			return cls;
 		} catch (Exception e) {
+			e.printStackTrace();
 			fail(e.getMessage());
 			return null;
 		}

jadx-core/src/test/java/jadx/tests/internal/generics/TestGenerics3.java

+package jadx.tests.internal.generics;
+
+import jadx.api.InternalJadxTest;
+import jadx.core.dex.nodes.ClassNode;
+
+import java.util.List;
+
+import org.junit.Test;
+
+import static org.hamcrest.CoreMatchers.containsString;
+import static org.junit.Assert.assertThat;
+
+public class TestGenerics3 extends InternalJadxTest {
+
+	public static class TestCls {
+
+		public static void mthExtendsArray(List<? extends byte[]> list) {
+		}
+
+		public static void mthSuperArray(List<? super int[]> list) {
+		}
+
+		public static void mthSuperInteger(List<? super Integer> list) {
+		}
+
+		public static void mthExtendsString(List<? super String> list) {
+		}
+	}
+
+	@Test
+	public void test() {
+		ClassNode cls = getClassNode(TestCls.class);
+		String code = cls.getCode().toString();
+		System.out.println(code);
+
+		assertThat(code, containsString("mthExtendsArray(List<? extends byte[]> list)"));
+		assertThat(code, containsString("mthSuperArray(List<? super int[]> list)"));
+		assertThat(code, containsString("mthSuperInteger(List<? super Integer> list)"));
+		assertThat(code, containsString("mthExtendsString(List<? super String> list)"));
+	}
+}