From e469086f09492a377ccc6074e432ed80aaa2a2e6 Mon Sep 17 00:00:00 2001
From: Stephan Hageboeck <stephan.hageboeck@cern.ch>
Date: Tue, 17 Feb 2026 14:19:29 +0100
Subject: [PATCH] [net] Correctly restore gFile.

In the previous attempt to use TContext, TFile::TContext was used in an
attempt to restore gFile. This, however, only restores gDirectory, and
was therefore redundant with TDirectory::TContext.
---
 net/httpsniff/src/TRootSnifferFull.cxx | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/httpsniff/src/TRootSnifferFull.cxx b/net/httpsniff/src/TRootSnifferFull.cxx
index 1ea46f6f20d6b..c9f265fb2f43e 100644
--- a/net/httpsniff/src/TRootSnifferFull.cxx
+++ b/net/httpsniff/src/TRootSnifferFull.cxx
@@ -342,7 +342,10 @@ Bool_t TRootSnifferFull::ProduceRootFile(const std::string &path, const std::str
    }
 
    TDirectory::TContext dirCtx{nullptr};
-   TFile::TContext fileCtx{nullptr};
+   struct RestoreGFile {
+      TFile *oldFile{gFile};
+      ~RestoreGFile() { gFile = oldFile; }
+   } restoreGFile;
 
    {
       TMemFile memfile("dummy.file", "RECREATE");