diff --git a/wip-duuqnd/user-side-compiler/error-handling.lisp b/wip-duuqnd/user-side-compiler/error-handling.lisp
index ed4e95c..9e7a36e 100644
--- a/wip-duuqnd/user-side-compiler/error-handling.lisp
+++ b/wip-duuqnd/user-side-compiler/error-handling.lisp
@@ -8,7 +8,9 @@
                      :finally (return start))))
     (subseq string
             start
-            (position #\Newline string :start (1+ start)))))
+            (if (< start (length string))
+                (position #\Newline string :start (1+ start))
+                nil))))
 
 (defun point-out-source (source)
   (if (null source)