--- a/regexParser/subsetConstraction.cc	Thu Dec 24 17:56:28 2015 +0900
+++ b/regexParser/subsetConstraction.cc	Thu Dec 24 18:00:55 2015 +0900
@@ -112,7 +112,7 @@
     return cc;
 }
 
-CharClassWalkerPtr findLeftMost(CharClassPtr next,CharClassWalkerPtr walk) {
+void findLeftMost(CharClassPtr next,CharClassWalkerPtr walk) {
     while (next->left) {
         CharClassStackPtr ccs = NEW(CharClassStack);
         ccs->next = walk->stack;
@@ -122,7 +122,6 @@
         next = next->left;
     }
     walk->next = next;
-    return walk;
 }
 
 CharClassWalkerPtr createCharClassWalker (CharClassPtr next) {
@@ -134,7 +133,7 @@
         walk->next = next;
         return walk;
     }
-    walk = findLeftMost(next,walk);
+    findLeftMost(next,walk);
     return walk;
 }
 
@@ -163,12 +162,12 @@
         }
         if (walk->stack->turn == LEFT) {
             walk->next = walk->stack->cc;
-            walk->stack->tuen == SELF;
+            walk->stack->turn = SELF;
             return current;
         }
         if (current->right) {
             walk->stack->turn = RIGHT;
-            walk->next = findLeftMost(current->right,walk);
+            findLeftMost(current->right,walk);
             return current;
         }
         charClassStackPop(walk);