diff --git a/runtime/runtime.c b/runtime/runtime.c
index 6710bd94a..40a959ea4 100644
--- a/runtime/runtime.c
+++ b/runtime/runtime.c
@@ -632,6 +632,8 @@ extern void* Lsubstring (void *subj, int p, int l) {
 extern struct re_pattern_buffer *Lregexp (char *regexp) {
   regex_t *b = (regex_t*) malloc (sizeof (regex_t));
 
+  /* printf ("regexp: %s,\t%x\n", regexp, b); */
+  
   memset (b, 0, sizeof (regex_t));
   
   int n = (int) re_compile_pattern (regexp, strlen (regexp), b);
@@ -652,6 +654,8 @@ extern int LregexpMatch (struct re_pattern_buffer *b, char *s, int pos) {
 
   res = re_match (b, s, LEN(TO_DATA(s)->tag), UNBOX(pos), 0);
 
+  /* printf ("regexpMatch %x: %s, res=%d\n", b, s+UNBOX(pos), res); */
+  
   if (res) {
     return BOX (res);
   }
diff --git a/src/version.ml b/src/version.ml
index cba252b4d..43eb219b1 100644
--- a/src/version.ml
+++ b/src/version.ml
@@ -1 +1 @@
-let version = "Version 1.10, 1a1c2e628, Tue Oct 11 17:05:26 2022 +0300"
+let version = "Version 1.10, 80b391aff, Tue Oct 25 02:57:51 2022 +0300"
diff --git a/stdlib/Collection.lama b/stdlib/Collection.lama
index 32713526e..77d7958d4 100644
--- a/stdlib/Collection.lama
+++ b/stdlib/Collection.lama
@@ -16,8 +16,8 @@ fun printColl ([m, _]) {
     | MNode (k, v, b, l, r) ->
       printf ("** key = %s, bf = %d **\n", k.string, b);
       printf (off);
-      printf ("   values :\n");
-      iter (fun ([x, _]) {printf (off); printf ("             %s\n", x.string)}, v);
+      printf ("   values : %s\n", v.string);
+--      iter (fun ([x, _]) {printf (off); printf ("             %s\n", x.string)}, v);
       inner ("  " ++ off, l);
       inner ("  " ++ off, r)
     esac
@@ -34,7 +34,7 @@ public fun validateColl ([t, compare]) {
        if verify (k)
        then
 	 var lh = inner (l, fun (x) {compare (x, k) < 0}),
-	       rh = inner (r, fun (x) {compare (x, k) > 0});
+	     rh = inner (r, fun (x) {compare (x, k) > 0});
 
          if bf == lh - rh
 	 then 1 + if lh > rh then lh else rh fi
@@ -260,7 +260,7 @@ public fun isEmptySet (s) {
 }
 
 public fun addSet (s, v) {
-  insertColl (s, v, true, Set)
+  insertColl (s, v, true, Set) 
 }
 
 public fun memSet (s, v) {
@@ -317,10 +317,6 @@ public fun lookupMemo (mm@[p, m], v) {
           | _              -> false
           esac;
 
-  if f then
-    skip -- printf ("Looked up 0x%.8x | 0x%.8x | %s\n", mm, v, v.string)
-  fi;
-
   case
   fun (x) {
     case p of
diff --git a/stdlib/Matcher.lama b/stdlib/Matcher.lama
index d86640c01..65b0ee2d0 100644
--- a/stdlib/Matcher.lama
+++ b/stdlib/Matcher.lama
@@ -66,7 +66,7 @@ fun createMatcher (buf, pos, line, col) {
       if x < y then x else y fi
     }
     
-    -- printf ("Matching regexp %s against %s...\n", r.string, substring (buf, pos, min (10, buf.length - pos)));
+    -- printf ("Matching regexp %x against %s...\n", r, substring (buf, pos, min (10, buf.length - pos)));
 
     if (n := regexpMatch (r[0], buf, pos)) >= 0
     then Succ (substring (buf, pos, n), shift (n))
diff --git a/stdlib/Ostap.lama b/stdlib/Ostap.lama
index 99efddb04..3875248a8 100644
--- a/stdlib/Ostap.lama
+++ b/stdlib/Ostap.lama
@@ -41,6 +41,7 @@ public fun memo (f) {
          case findHashTab (deref (tab), f) of
            Some (t) -> t
          esac;
+        
       if log then printf ("Applying memoized parser to %s\n", s.string) fi;
       case findMap (deref (t), s) of
         None  ->
@@ -53,6 +54,7 @@ public fun memo (f) {
                                                                                  })]);
           f (fun (r) {
                --r := lookupMemo (restab, r);
+
                if log then printf ("Running continuation with result %s\n", r.string) fi;
                case findMap (deref (t), s) of
                  Some ([ks, rs]) ->                   
@@ -117,7 +119,7 @@ public fun seq (a, b) {
       a (fun (ar) {
                   case ar of             
                     Succ (x, s) -> b (x) (k) (s)
-                  | _           -> k (ar)
+                  | _          -> k (ar)
                   esac
          }) (s)
     }
@@ -130,7 +132,7 @@ public infixr |> after  |  (a, b) {seq (a, b)}
 public infix @ at * (a, f) {
   fun (k) {
     fun (s) {
-      a (fun (x) {k (case x of                       
+      a (fun (x) {k (case x of
                        Succ (x, s) -> Succ (f (x), s)
                      | _           -> x
                      esac)}) (s)
@@ -142,7 +144,7 @@ public infix @@ at * ([name, a], f) {
   fun (k) {
     fun (s) {
       var aa =
-      a (fun (x) {k (case x of                       
+      a (fun (x) {k (case x of               
                        Succ (x, s) -> Succ (f (x), s)
                      | _           -> x
                      esac)});