From 58d0221ddc5f31940355887a3ca0512b55b82793 Mon Sep 17 00:00:00 2001
From: Balazs Racz <balazs.racz@gmail.com>
Date: Fri, 29 Oct 2021 21:03:55 +0200
Subject: [PATCH] Fix bug in TempFile::rewrite.

---
 src/os/TempFile.hxx | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/os/TempFile.hxx b/src/os/TempFile.hxx
index ee3100836..0b9a30ac9 100644
--- a/src/os/TempFile.hxx
+++ b/src/os/TempFile.hxx
@@ -117,6 +117,7 @@ public:
   /// the data to write.
   void rewrite(const string& s) {
       ::lseek(fd_, 0, SEEK_SET);
+      ::ftruncate(fd_, 0);
       write(s);
   }