[clang-tools-extra] fix pp-trace crashes with no options (PR #215452)

[via cfe-commits]

https://github.com/biubiuzy created https://github.com/llvm/llvm-project/pull/215452

Currently, executing pp-trace without parameters causes a crash. Now:
```
# pp-trace
error: pp-trace: Not enough positional command line arguments specified!
Must specify at least 1 positional argument: See: pp-trace --help
```

>From 71c95948e1737fad285effd6cd07d47e109bf9f6 Mon Sep 17 00:00:00 2001
From: biubiuzy <294772273 at qq.com>
Date: Tue, 11 Aug 2026 11:38:29 +0800
Subject: [PATCH] fix pp-trace crashes with no options

Currently, executing pp-trace without parameters causes a crash.
Now:
```
# pp-trace
error: pp-trace: Not enough positional command line arguments specified!
Must specify at least 1 positional argument: See: pp-trace --help
```
---
 clang-tools-extra/pp-trace/PPTrace.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clang-tools-extra/pp-trace/PPTrace.cpp b/clang-tools-extra/pp-trace/PPTrace.cpp
index ba5a06a26830d..7b4ffa419c75b 100644
--- a/clang-tools-extra/pp-trace/PPTrace.cpp
+++ b/clang-tools-extra/pp-trace/PPTrace.cpp
@@ -129,7 +129,7 @@ int main(int argc, const char **argv) {
   using namespace clang::pp_trace;
   InitLLVM X(argc, argv);
   auto OptionsParser = clang::tooling::CommonOptionsParser::create(
-      argc, argv, Cat, llvm::cl::ZeroOrMore);
+      argc, argv, Cat, llvm::cl::OneOrMore);
   if (!OptionsParser)
     error(toString(OptionsParser.takeError()));
   // Parse the IgnoreCallbacks list into strings.