--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/spellcheck-transposition.c	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,20 @@
+/* PR other/69968.  */
+
+struct {
+  int coordx, coordy, coordz;
+  int coordx1, coordy1, coordz1;
+} c;
+
+/* Consider the misspelling "coorzd1".
+
+   With Levenshtein distance, the misspelling has an edit distance of 2
+   to all 6 of the fields (e.g. via a deletion and a substitution for the
+   first three, and via deletion and insertion for the second three).
+   
+   With Damerau-Levenshtein, the misspelling has an edit distance of 1
+   via transposition to "coordz1", and 2 to the other fields.  */
+
+void foo (void)
+{
+  c.coorzd1 = c.coordy; /* { dg-error "has no member named 'coorzd1'; did you mean 'coordz1'" } */
+}