From 884839a691e800e56e185e10019a66b12feea640 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 2 Sep 2021 22:42:41 +0530
Subject: [PATCH] Fix #1942463 [Syntax error in
 formatter.py](https://bugs.launchpad.net/calibre/+bug/1942463)

---
 src/calibre/utils/formatter.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/calibre/utils/formatter.py b/src/calibre/utils/formatter.py
index a841c02010..dc9cf799c3 100644
--- a/src/calibre/utils/formatter.py
+++ b/src/calibre/utils/formatter.py
@@ -925,8 +925,9 @@ class _Interpreter(object):
 
     def do_node_first_non_empty(self, prog):
         for expr in prog.expression_list:
-            if v := self.expr(expr):
-                if (self.break_reporter):
+            v = self.expr(expr)
+            if v == self.expr(expr):
+                if self.break_reporter:
                     self.break_reporter(prog.node_name, v, prog.line_number)
                 return v
         if (self.break_reporter):