From ec1d3bc0b64550307c23ceae7ef542124b68e2e5 Mon Sep 17 00:00:00 2001
From: Fred Baksik <fdk17@ftml.net>
Date: Wed, 15 Jul 2020 15:03:45 -0400
Subject: cmake: avoid exception when printing "changed variables" message

If the changed cache variable was a list then this processing may
attempt to access beyond the last item in the list. Instead skip
printing the non-existing value and backup one to finish the loop.
---
 Source/cmake.cxx | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Source/cmake.cxx b/Source/cmake.cxx
index 45fa44b..aa8298f 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -1390,8 +1390,13 @@ int cmake::HandleDeleteCacheVariables(const std::string& var)
     save.key = *i;
     warning << *i << "= ";
     i++;
-    save.value = *i;
-    warning << *i << "\n";
+    if (i != argsSplit.end()) {
+      save.value = *i;
+      warning << *i << "\n";
+    } else {
+      warning << "\n";
+      i -= 1;
+    }
     cmProp existingValue = this->State->GetCacheEntryValue(save.key);
     if (existingValue) {
       save.type = this->State->GetCacheEntryType(save.key);
-- 
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