From 817dacfc77d22d141178cbe3746a88eac62ef8a4 Mon Sep 17 00:00:00 2001
From: Boaz Brickner <brickner@google.com>
Date: Wed, 9 Apr 2025 15:17:26 +0200
Subject: [PATCH] Fix clang-tidy: function 'rewind' has no error detection;
 'fseek' should be used instead
 [bugprone-unsafe-functions,-warnings-as-errors] (#5265)

---
 testing/file_test/run_test.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/testing/file_test/run_test.cpp b/testing/file_test/run_test.cpp
index c01d88176394..db987fe5d1a7 100644
--- a/testing/file_test/run_test.cpp
+++ b/testing/file_test/run_test.cpp
@@ -122,7 +122,7 @@ auto RunTestFile(const FileTestBase& test_base, bool dump_output,
       input_stream = tmpfile();
       fwrite(split->content.c_str(), sizeof(char), split->content.size(),
              input_stream);
-      rewind(input_stream);
+      CARBON_CHECK(!fseek(input_stream, 0, SEEK_SET));
     } else if (!fs->addFile(split->filename, /*ModificationTime=*/0,
                             llvm::MemoryBuffer::getMemBuffer(
                                 split->content, split->filename,