From 7a1cce210baad152c834b7497ea34f50f5177390 Mon Sep 17 00:00:00 2001
From: Betsy McPhail <betsy.mcphail@khq.kitware.com>
Date: Wed, 11 Mar 2020 11:41:26 -0400
Subject: CTest: Fix our internal CURL_DEBUGFUNCTION to conform to CURL docs

The curl debug callback function must return ``0``.

Fixes: #20449
---
 Source/CTest/cmCTestCurl.cxx          | 2 +-
 Source/CTest/cmCTestSubmitHandler.cxx | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Source/CTest/cmCTestCurl.cxx b/Source/CTest/cmCTestCurl.cxx
index 3ad4749..69c5793 100644
--- a/Source/CTest/cmCTestCurl.cxx
+++ b/Source/CTest/cmCTestCurl.cxx
@@ -55,7 +55,7 @@ size_t curlDebugCallback(CURL* /*unused*/, curl_infotype /*unused*/,
                          char* chPtr, size_t size, void* data)
 {
   cm::append(*static_cast<std::vector<char>*>(data), chPtr, chPtr + size);
-  return size;
+  return 0;
 }
 }
 
diff --git a/Source/CTest/cmCTestSubmitHandler.cxx b/Source/CTest/cmCTestSubmitHandler.cxx
index a8f201a..22ab48f 100644
--- a/Source/CTest/cmCTestSubmitHandler.cxx
+++ b/Source/CTest/cmCTestSubmitHandler.cxx
@@ -110,7 +110,7 @@ static size_t cmCTestSubmitHandlerCurlDebugCallback(CURL* /*unused*/,
 {
   cm::append(*static_cast<cmCTestSubmitHandlerVectorOfChar*>(data), chPtr,
              chPtr + size);
-  return size;
+  return 0;
 }
 
 cmCTestSubmitHandler::cmCTestSubmitHandler()
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