https://github.com/el-ev created
https://github.com/llvm/llvm-project/pull/144286
- Closes #144264
>From 70b7c4140e8991a56275782a282a7a9d9b3be155 Mon Sep 17 00:00:00 2001
From: Iris Shi <0...@owo.li>
Date: Mon, 16 Jun 2025 09:37:17 +0800
Subject: [PATCH] [clang][Parser] Fix crash on invalid attribute in constexpr
function
---
clang/lib/Parse/ParseDeclCXX.cpp | 4 ++++
clang/test/Parser/cxx-invalid-attr-in-constexpr-crash.cpp | 8 ++++++++
2 files changed, 12 insertions(+)
create mode 100644 clang/test/Parser/cxx-invalid-attr-in-constexpr-crash.cpp
diff --git a/clang/lib/Parse/ParseDeclCXX.cpp b/clang/lib/Parse/ParseDeclCXX.cpp
index f31c9265a0074..ed401c894f71c 100644
--- a/clang/lib/Parse/ParseDeclCXX.cpp
+++ b/clang/lib/Parse/ParseDeclCXX.cpp
@@ -760,6 +760,10 @@ Parser::DeclGroupPtrTy Parser::ParseUsingDeclaration(
Decl *AD = ParseAliasDeclarationAfterDeclarator(
TemplateInfo, UsingLoc, D, DeclEnd, AS, Attrs, &DeclFromDeclSpec);
+
+ if (!AD)
+ return nullptr;
+
return Actions.ConvertDeclToDeclGroup(AD, DeclFromDeclSpec);
}
diff --git a/clang/test/Parser/cxx-invalid-attr-in-constexpr-crash.cpp
b/clang/test/Parser/cxx-invalid-attr-in-constexpr-crash.cpp
new file mode 100644
index 0000000000000..82104779ca67e
--- /dev/null
+++ b/clang/test/Parser/cxx-invalid-attr-in-constexpr-crash.cpp
@@ -0,0 +1,8 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+// issue144264
+constexpr void test()
+{
+ using TT = struct T[deprecated{};
+ // expected-error@-1 {{use of undeclared identifier 'deprecated'}}
+}
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