From 73a410a00efb17ab7bc673bf2e3ecdc45eb876f4 Mon Sep 17 00:00:00 2001
From: Dimitri van Heesch <doxygen@gmail.com>
Date: Sun, 24 Nov 2019 19:10:02 +0100
Subject: Fixed endless loop during preprocessing

---
 src/pre.l | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/pre.l b/src/pre.l
index cf13764..abc9df9 100644
--- a/src/pre.l
+++ b/src/pre.l
@@ -2391,10 +2391,13 @@ static void expandExpression(yyscan_t yyscanner,QCString &expr,QCString *rest,in
   //printf(">expandExpression(expr='%s',rest='%s',pos=%d,level=%d)\n",expr.data(),rest ? rest->data() : 0, pos, level);
   if (expr.isEmpty())
   {
+    //printf("<expandExpression: empty\n");
     return;
   }
   if (state->expansionDict.find(expr)!=0) // check for recursive expansions
   {
+    expr=expr.left(pos)+"@-"+expr.right(expr.length()-pos);
+    //printf("<expandExpression: already expanded expr='%s'\n",expr.data());
     return;
   }
   else
-- 
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