From cf7fa70610a3b4c1e46b3c43b0eff8aec86893c4 Mon Sep 17 00:00:00 2001
From: Chris Jones <chrisdjones15@gmail.com>
Date: Thu, 8 Feb 2024 10:26:56 -0600
Subject: [PATCH] Throw exception if TFile::Open returns nullptr

---
 IOPool/Input/src/InputFile.cc | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/IOPool/Input/src/InputFile.cc b/IOPool/Input/src/InputFile.cc
index 016bb44c6a9b6..d9c1abd6e5fef 100644
--- a/IOPool/Input/src/InputFile.cc
+++ b/IOPool/Input/src/InputFile.cc
@@ -34,11 +34,10 @@ namespace edm {
       std::rethrow_exception(e);
     }
     if (!file_) {
-      return;
+      throw edm::Exception(errors::FileOpenError) << "TFile::Open failed.";
     }
     if (file_->IsZombie()) {
-      file_ = nullptr;  // propagate_const<T> has no reset() function
-      return;
+      throw edm::Exception(errors::FileOpenError) << "TFile::Open returned zombie.";
     }
 
     logFileAction("  Successfully opened file ", fileName);