Add test case for #935

pmd-java/src/test/resources/net/sourceforge/pmd/lang/java/rule/errorprone/xml/InvalidLogMessageFormat.xml

@@ -1162,6 +1162,24 @@ public class Foo {
         return msg;
     }
 }
+]]></code>
+    </test-code>
+
+    <test-code>
+        <description>#935 FP when exception is obtained from a method call</description>
+        <expected-problems>0</expected-problems>
+        <code><![CDATA[
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+public class Foo {
+    private static final Logger LOGGER = LoggerFactory.getLogger(Foo.class);
+    public static IllegalStateException exception() { return new IllegalStateException();}
+
+	public static void log() {
+        // violation raised below, but code is fine
+		LOGGER.warn("Exception {}", IllegalStateException.class.getName(), exception());
+	}
+}
 ]]></code>
     </test-code>
 </test-data>