1 files changed, 3 insertions, 0 deletions
diff --git a/object.c b/object.c
index 20c6e342fa..12985ee481 100644
--- a/object.c
+++ b/object.c
@@ -1643,6 +1643,9 @@ str_to_id(str)
     if (!RSTRING(str)->ptr || RSTRING(str)->len == 0) {
 	rb_raise(rb_eArgError, "empty symbol string");
     }
+    if (RSTRING(str)->len != strlen(RSTRING(str)->ptr)) {
+	warn("Symbols should not contain NUL (\\0)");
+    }
     return rb_intern(RSTRING(str)->ptr);
 }