From e6e7f2cab96066b5e7f595177a59ea1461608201 Mon Sep 17 00:00:00 2001
From: Raul Tambre <raul@tambre.ee>
Date: Sun, 10 Jan 2021 12:40:56 +0200
Subject: cmMakefile: Don't expand bracket arguments in --trace-expand

Bracket arguments are literal and shouldn't be expanded.

Fixes #21671.
---
 Source/cmMakefile.cxx                         | 2 +-
 Tests/RunCMake/CommandLine/trace-expand.cmake | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/Source/cmMakefile.cxx b/Source/cmMakefile.cxx
index 0e4f888..3946841 100644
--- a/Source/cmMakefile.cxx
+++ b/Source/cmMakefile.cxx
@@ -308,7 +308,7 @@ void cmMakefile::PrintCommandTrace(
 
   args.reserve(lff.Arguments().size());
   for (cmListFileArgument const& arg : lff.Arguments()) {
-    if (expand) {
+    if (expand && arg.Delim != cmListFileArgument::Bracket) {
       temp = arg.Value;
       this->ExpandVariablesInString(temp);
       args.push_back(temp);
diff --git a/Tests/RunCMake/CommandLine/trace-expand.cmake b/Tests/RunCMake/CommandLine/trace-expand.cmake
index e69de29..24da02a 100644
--- a/Tests/RunCMake/CommandLine/trace-expand.cmake
+++ b/Tests/RunCMake/CommandLine/trace-expand.cmake
@@ -0,0 +1 @@
+set(a [[\B]])
-- 
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