diff -urN ppp-2.4.1.org/common/zlib.c ppp-2.4.1/common/zlib.c
--- ppp-2.4.1.org/common/zlib.c	Wed Mar 13 09:37:55 2002
+++ ppp-2.4.1/common/zlib.c	Wed Mar 13 09:41:34 2002
@@ -3861,10 +3861,12 @@
                              &s->sub.trees.tb, z);
       if (t != Z_OK)
       {
-        ZFREE(z, s->sub.trees.blens);
         r = t;
         if (r == Z_DATA_ERROR)
+	{
+	  ZFREE(z, s->sub.trees.blens);
           s->mode = BADB;
+	}
         LEAVE
       }
       s->sub.trees.index = 0;
@@ -3929,11 +3931,13 @@
 #endif
         t = inflate_trees_dynamic(257 + (t & 0x1f), 1 + ((t >> 5) & 0x1f),
                                   s->sub.trees.blens, &bl, &bd, &tl, &td, z);
-        ZFREE(z, s->sub.trees.blens);
         if (t != Z_OK)
         {
           if (t == (uInt)Z_DATA_ERROR)
+	  {
+	    ZFREE(z, s->sub.trees.blens);
             s->mode = BADB;
+	  }
           r = t;
           LEAVE
         }
@@ -3950,6 +3954,7 @@
         s->sub.decode.tl = tl;
         s->sub.decode.td = td;
       }
+      ZFREE(z, s->sub.trees.blens);
       s->mode = CODES;
     case CODES:
       UPDATE