From 499009b79cdb48646b87a661e18ca903a3ae7e0f Mon Sep 17 00:00:00 2001
From: Ben Boeckel <ben.boeckel@kitware.com>
Date: Fri, 15 Apr 2022 13:50:41 -0400
Subject: cmTarget: avoid creating export entries if they don't exist

---
 Source/cmTarget.cxx | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Source/cmTarget.cxx b/Source/cmTarget.cxx
index 446964c..61b3e4d 100644
--- a/Source/cmTarget.cxx
+++ b/Source/cmTarget.cxx
@@ -1291,7 +1291,12 @@ void cmTarget::AddInstallIncludeDirectories(cmTargetExport const& te,
 cmStringRange cmTarget::GetInstallIncludeDirectoriesEntries(
   cmTargetExport const& te) const
 {
-  return cmMakeRange(this->impl->InstallIncludeDirectoriesEntries[&te]);
+  auto i = this->impl->InstallIncludeDirectoriesEntries.find(&te);
+  if (i == this->impl->InstallIncludeDirectoriesEntries.end()) {
+    decltype(i->second) empty;
+    return cmMakeRange(empty);
+  }
+  return cmMakeRange(i->second);
 }
 
 cmBTStringRange cmTarget::GetIncludeDirectoriesEntries() const
-- 
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