https://github.com/boomanaiden154 created 
https://github.com/llvm/llvm-project/pull/157606

head on MacOS by default does not support negative numbers. Try using sed to 
remove the last line of the file instead.

>From bf9bc100fd215f3450ae04881fe6272f8441240e Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengross...@google.com>
Date: Tue, 9 Sep 2025 03:52:31 +0000
Subject: [PATCH] [APINotes] FIx yaml-roundtrip.test

head on MacOS by default does not support negative numbers. Try using
sed to remove the last line of the file instead.
---
 clang/test/APINotes/yaml-roundtrip.test | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clang/test/APINotes/yaml-roundtrip.test 
b/clang/test/APINotes/yaml-roundtrip.test
index f4fa9ce7d70c3..702de91d55690 100644
--- a/clang/test/APINotes/yaml-roundtrip.test
+++ b/clang/test/APINotes/yaml-roundtrip.test
@@ -1,6 +1,6 @@
 RUN: apinotes-test 
%S/Inputs/Frameworks/Simple.framework/Headers/Simple.apinotes > %t.result
 RUN: not diff -u %S/Inputs/Frameworks/Simple.framework/Headers/Simple.apinotes 
%t.result | \
-RUN:   tail -n +5 | head -n -1 | \
+RUN:   tail -n +5 | sed \$d | \
 RUN:   FileCheck %s --implicit-check-not="{{^\+}}" 
--implicit-check-not="{{^\-}}"
 
 We expect only the nullability to be different as it is canonicalized during 
the

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