fix: allow local variables have name same as instance fields (#1183)

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

@@ -70,7 +70,9 @@ public class NameGen {
 	private void addNamesUsedInClass() {
 		ClassNode parentClass = mth.getParentClass();
 		for (FieldNode field : parentClass.getFields()) {
-			varNames.add(field.getAlias());
+			if (field.isStatic()) {
+				varNames.add(field.getAlias());
+			}
 		}
 		for (ClassNode innerClass : parentClass.getInnerClasses()) {
 			varNames.add(innerClass.getClassInfo().getAliasShortName());

jadx-core/src/test/java/jadx/tests/integration/names/TestConstructorArgNames.java

@@ -0,0 +1,41 @@
+package jadx.tests.integration.names;
+
+import org.junit.jupiter.api.Test;
+
+import jadx.tests.api.IntegrationTest;
+
+import static jadx.tests.api.utils.assertj.JadxAssertions.assertThat;
+
+public class TestConstructorArgNames extends IntegrationTest {
+
+	@SuppressWarnings({ "FieldCanBeLocal", "FieldMayBeFinal", "StaticVariableName", "ParameterName" })
+	public static class TestCls {
+		private static String STR = "static field";
+		private final String str;
+		private final String store;
+
+		public TestCls(String str, String STR) {
+			this.str = str;
+			this.store = STR;
+		}
+
+		public TestCls() {
+			this.str = "a";
+			this.store = STR;
+		}
+
+		public void check() {
+			assertThat(new TestCls("a", "b").store).isEqualTo("b");
+			assertThat(new TestCls().store).isEqualTo(STR);
+		}
+	}
+
+	@Test
+	public void test() {
+		assertThat(getClassNode(TestCls.class))
+				.code()
+				.containsOne("this.str = str;")
+				.containsOne("this.store = STR2;")
+				.containsOne("this.store = STR;");
+	}
+}