From 634d6f20c98dffc17b6d332290a4f08737cede18 Mon Sep 17 00:00:00 2001
From: Ben Boeckel <ben.boeckel@kitware.com>
Date: Sat, 21 May 2022 17:22:44 -0400
Subject: cmGlobalGenerator: check for `nullptr` in `GetLanguageFromExtension`

Found by `clang-analyzer`.
---
 Source/cmGlobalGenerator.cxx | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Source/cmGlobalGenerator.cxx b/Source/cmGlobalGenerator.cxx
index 3831546..4d636e4 100644
--- a/Source/cmGlobalGenerator.cxx
+++ b/Source/cmGlobalGenerator.cxx
@@ -1152,7 +1152,10 @@ std::string cmGlobalGenerator::GetLanguageFromExtension(const char* ext) const
 {
   // if there is an extension and it starts with . then move past the
   // . because the extensions are not stored with a .  in the map
-  if (ext && *ext == '.') {
+  if (!ext) {
+    return "";
+  }
+  if (*ext == '.') {
     ++ext;
   }
   auto const it = this->ExtensionToLanguage.find(ext);
-- 
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