From 0f0c4061ff0c1278aa52dd4d30a3fe5fd24d315c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Oliver=20St=C3=B6neberg?=
 <firewave@users.noreply.github.com>
Date: Wed, 17 Aug 2022 13:50:39 +0200
Subject: [PATCH] astutils.cpp: avoid redundant callback invocation in
 `isExpressionChangedAt()` (#4369)

---
 lib/astutils.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/astutils.cpp b/lib/astutils.cpp
index 68c5120d8..fb5a2934b 100644
--- a/lib/astutils.cpp
+++ b/lib/astutils.cpp
@@ -2482,10 +2482,11 @@ static bool isExpressionChangedAt(const F& getExprTok,
             return true;
         bool aliased = false;
         // If we can't find the expression then assume it is an alias
-        if (!getExprTok())
+        auto expr = getExprTok();
+        if (!expr)
             aliased = true;
         if (!aliased)
-            aliased = isAliasOf(tok, getExprTok());
+            aliased = isAliasOf(tok, expr);
         if (!aliased)
             return false;
         if (isVariableChanged(tok, 1, settings, cpp, depth))