From 577264928c403635465468e412882748a1f46da1 Mon Sep 17 00:00:00 2001
From: ferdymercury <ferdymercury@users.noreply.github.com>
Date: Fri, 15 Nov 2024 17:49:05 +0100
Subject: [PATCH] [metacling] print to stderr before exiting

---
 core/metacling/src/TCling.cxx | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/core/metacling/src/TCling.cxx b/core/metacling/src/TCling.cxx
index 543109cf17d95..f3ac7fcd6a869 100644
--- a/core/metacling/src/TCling.cxx
+++ b/core/metacling/src/TCling.cxx
@@ -1536,8 +1536,10 @@ TCling::TCling(const char *name, const char *title, const char* const argv[], vo
                                                        llvmResourceDir, extensions,
                                                        interpLibHandle);
 
-   if (!fInterpreter->getCI()) // Compiler instance could not be created. See https://its.cern.ch/jira/browse/ROOT-10239
-      exit(1);
+   if (!fInterpreter->getCI()) { // Compiler instance could not be created. See https://its.cern.ch/jira/browse/ROOT-10239
+      std::cerr << "Exiting now since compiler instance is not available." << std::endl;
+      exit(EXIT_FAILURE);
+   }
    // Don't check whether modules' files exist.
    fInterpreter->getCI()->getPreprocessorOpts().DisablePCHOrModuleValidation =
       DisableValidationForModuleKind::All;