From 6e3595a6808a80bb8ddd7cb63d2732e5c0ccb600 Mon Sep 17 00:00:00 2001
From: Charles Haley <cbhaley@i.wont.say.com>
Date: Sun, 18 Apr 2021 15:51:23 +0100
Subject: [PATCH] Fix regression that broke using stored templates.

---
 src/calibre/utils/formatter.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/calibre/utils/formatter.py b/src/calibre/utils/formatter.py
index 0c5950d09a..78c247cd18 100644
--- a/src/calibre/utils/formatter.py
+++ b/src/calibre/utils/formatter.py
@@ -796,6 +796,8 @@ class _Interpreter(object):
             saved_line_number = self.override_line_number
             self.override_line_number = (self.override_line_number if self.override_line_number
                                          else prog.line_number)
+        else:
+            saved_line_number = None
         try:
             val = self.expression_list(prog.function)
         except ReturnExecuted as e: