From 1c392f4e42493da7ef08ef574953d853475c41bf Mon Sep 17 00:00:00 2001
From: Anton Trunov <anton.a.trunov@gmail.com>
Date: Tue, 13 Jul 2021 12:22:05 +0300
Subject: [PATCH] sexp parser: ignore more malformed input

---
 alectryon/sexp.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/alectryon/sexp.py b/alectryon/sexp.py
index b8bf3b2c..88b2b565 100644
--- a/alectryon/sexp.py
+++ b/alectryon/sexp.py
@@ -68,7 +68,7 @@ def parse(tokens):
             stack.append(top)
             top = new
         elif tok is CLOSE:
-            top = stack.pop()
+            if stack: top = stack.pop()
         else:
             top.append(tok)
     return top[0]