diff --git a/src/test.cpp b/src/test.cpp
index 8a2ad0d..d044ebd 100644
--- a/src/test.cpp
+++ b/src/test.cpp
@@ -465,9 +465,6 @@ private:
         break;
       }
     }
-    if (buf == bufBefore) {
-      return false;
-    }
     callbacks->on_number_data(data, bufBefore, buf - bufBefore);
     callbacks->on_end_number(data);
     return true;
@@ -628,7 +625,7 @@ private:
 
   char *buf;
   char *bufEnd;
-  int len() { return bufEnd - buf; }
+  int len() const { return bufEnd - buf; }
   const Callbacks *const callbacks;
   void *const data;
   Symbol stack[kMaxStackSize];