https://github.com/Rajveer100 updated https://github.com/llvm/llvm-project/pull/210973
>From e1656df3890c0cd1e8e796573f31fac0a3bb75af Mon Sep 17 00:00:00 2001 From: Rajveer <[email protected]> Date: Tue, 21 Jul 2026 18:07:30 +0530 Subject: [PATCH] [clang][SemaCXX] Fixed a crash when returning an initialization to a top-level deleted function Resolves #208488 This crash is caused due to requesting declaration alignment for undeduced types like `auto`. --- clang/docs/ReleaseNotes.md | 2 ++ clang/lib/Sema/SemaStmt.cpp | 7 +++++++ clang/test/SemaCXX/deleted-function-return.cpp | 8 ++++++++ 3 files changed, 17 insertions(+) create mode 100644 clang/test/SemaCXX/deleted-function-return.cpp diff --git a/clang/docs/ReleaseNotes.md b/clang/docs/ReleaseNotes.md index 28fea9a99b609..d8943d6af7a7d 100644 --- a/clang/docs/ReleaseNotes.md +++ b/clang/docs/ReleaseNotes.md @@ -334,6 +334,8 @@ latest release, please see the [Clang Web Site](https://clang.llvm.org) or the `[](Types... = args...) {}`). Clang now diagnoses the illegal default argument instead of asserting. (#GH210714) +- Fixed a crash when returning an initialization to a top-level deleted function. (#GH208488) + #### Bug Fixes to AST Handling - Fixed a non-deterministic ordering of unused local typedefs that made diff --git a/clang/lib/Sema/SemaStmt.cpp b/clang/lib/Sema/SemaStmt.cpp index cc325620883f0..83e0eb9caadca 100644 --- a/clang/lib/Sema/SemaStmt.cpp +++ b/clang/lib/Sema/SemaStmt.cpp @@ -3545,6 +3545,13 @@ Sema::NamedReturnInfo Sema::getNamedReturnInfo(const VarDecl *VD) { return NamedReturnInfo(); } + const Type *T = VDType.getTypePtr(); + if (T->getTypeClass() == Type::Auto) { + const auto *A = cast<DeducedType>(T); + if (A->isUndeducedAutoType()) + return NamedReturnInfo(); + } + // Variables with higher required alignment than their type's ABI // alignment cannot use NRVO. if (!VD->hasDependentAlignment() && !VDType->isIncompleteType() && diff --git a/clang/test/SemaCXX/deleted-function-return.cpp b/clang/test/SemaCXX/deleted-function-return.cpp new file mode 100644 index 0000000000000..9320b85cd1dc8 --- /dev/null +++ b/clang/test/SemaCXX/deleted-function-return.cpp @@ -0,0 +1,8 @@ +// RUN: %clang_cc1 -verify -std=c++2a -fsyntax-only %s + +auto f() = delete; // expected-note {{candidate function has been explicitly deleted}} + +auto g() { + auto x = f(); // expected-error {{call to deleted function 'f'}} + return x; +} _______________________________________________ cfe-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
