From ecbb06e74072d0902726bb10853f144842f443b8 Mon Sep 17 00:00:00 2001
From: Michael Davidsaver <mdavidsaver@gmail.com>
Date: Mon, 9 Mar 2020 11:41:01 -0700
Subject: [PATCH] trap iteration of non-Struct

---
 src/data.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/data.cpp b/src/data.cpp
index 2997cb8..4ffcf1e 100644
--- a/src/data.cpp
+++ b/src/data.cpp
@@ -745,7 +745,11 @@ void Value::_iter_fl(Value::IterInfo &info, bool first) const
     if(!store)
         throw NoField();
 
-    if(info.depth) {
+    if(desc->code!=TypeCode::Struct) {
+        // TODO implement iteration of Union, or Struct[]/Union[]
+        info.pos = info.nextcheck = 0;
+
+    } else if(info.depth) {
         info.pos = info.nextcheck = first ? 1u : desc->size();
 
         if(info.marked)