1 files changed, 1 insertions, 0 deletions
diff --git a/src/unistring.h b/src/unistring.h
index 979ce08b..577e0da4 100644
--- a/src/unistring.h
+++ b/src/unistring.h
@@ -69,6 +69,7 @@ public:
     const char * p   = input.c_str();
     std::size_t  len = input.length();
 
+    assert(len < 1024);
     VERIFY(utf8::is_valid(p, p + len));
     utf8::unchecked::utf8to32(p, p + len, std::back_inserter(utf32chars));
   }