From 043bdf567756e6a30dd1e62bef10607d28a3db91 Mon Sep 17 00:00:00 2001
From: Olly Betts <olly@survex.com>
Date: Wed, 19 Apr 2023 14:52:40 +1200
Subject: Copy over missing parts of macro expansion code

We need to insert newlines for a multi-line macro invocation, and
we shouldn't leak memory.
---
 Source/Preprocessor/cpp.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Source/Preprocessor/cpp.c b/Source/Preprocessor/cpp.c
index b9ce54361..55058fc13 100644
--- a/Source/Preprocessor/cpp.c
+++ b/Source/Preprocessor/cpp.c
@@ -1297,9 +1297,14 @@ static DOH *Preprocessor_replace(DOH *s, DOH *line_file) {
         args = 0;
       }
       e = expand_macro(id, args, s);
-      if (e)
+      if (e) {
 	Append(ns, e);
+      }
+      while (macro_additional_lines--) {
+	Putc('\n', ns);
+      }
       Delete(e);
+      Delete(args);
     } else {
       Append(ns, id);
     }
-- 
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