Test caller line data only when available (2)

logback-android/src/test/java/ch/qos/logback/classic/pattern/ConverterTest.java

@@ -405,7 +405,7 @@ public void contextProperty() {
   }
 
   private void assumeStackTraceDetailsAvailable() {
-    StackTraceElement[] stackTraceElements = Thread.currentThread().getStackTrace();
+    StackTraceElement[] stackTraceElements = new Throwable().getStackTrace();
     assumeThat(stackTraceElements[0].getLineNumber(), is(greaterThan(-1)));
   }
 }