From 1d86d8b8f30ba4894ab3f63f76dcc8c96189eb24 Mon Sep 17 00:00:00 2001
From: "Joel E. Denny" <jdenny.ornl@gmail.com>
Date: Sat, 27 Mar 2021 11:03:10 -0400
Subject: [PATCH] [FileCheck] Try to fix buildbot failures caused by
 c7c542e8f306

For example,

<https://lab.llvm.org/buildbot/#/builders/132/builds/3929>

has this diagnostic:

```
/opt/gcc/9.3.0/snos/include/g++/bits/stl_tree.h:780:8: error: static assertion failed: comparison object must be invocable as const
  780 |        is_invocable_v<const _Compare&, const _Key&, const _Key&>,
      |        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
```
---
 utils/FileCheck/FileCheck.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/utils/FileCheck/FileCheck.cpp b/utils/FileCheck/FileCheck.cpp
index 0e97c711c0a..4dcc4812502 100644
--- a/utils/FileCheck/FileCheck.cpp
+++ b/utils/FileCheck/FileCheck.cpp
@@ -380,7 +380,7 @@ BuildInputAnnotations(const SourceMgr &SM, unsigned CheckFileBufferID,
                       std::vector<InputAnnotation> &Annotations,
                       unsigned &LabelWidth) {
   struct CompareSMLoc {
-    bool operator()(const SMLoc &LHS, const SMLoc &RHS) {
+    bool operator()(const SMLoc &LHS, const SMLoc &RHS) const {
       return LHS.getPointer() < RHS.getPointer();
     }
   };