[clang] [clang] fix a crash for uses of a pseudo-destructor of enum without definition (PR #210424)

[Matheus Izvekov via cfe-commits]

https://github.com/mizvekov created https://github.com/llvm/llvm-project/pull/210424

Lookup for the destuctor name in the object type only applies to record types.

Fixes #209808

>From 16b6c8da89872effded63637b343ff26e61be13f Mon Sep 17 00:00:00 2001
From: Matheus Izvekov <mizvekov at gmail.com>
Date: Fri, 17 Jul 2026 17:01:38 -0300
Subject: [PATCH] [clang] fix a crash for uses of a pseudo-destructor of enum
 without definition

Lookup for the destuctor name in the object type only applies to record types.

Fixes #209808
---
 clang/docs/ReleaseNotes.md                      | 3 +++
 clang/lib/Sema/SemaCXXScopeSpec.cpp             | 2 +-
 clang/test/SemaTemplate/destructor-template.cpp | 7 +++++++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/clang/docs/ReleaseNotes.md b/clang/docs/ReleaseNotes.md
index 51dc07318e7ce..5bc5801054060 100644
--- a/clang/docs/ReleaseNotes.md
+++ b/clang/docs/ReleaseNotes.md
@@ -157,6 +157,9 @@ latest release, please see the [Clang Web Site](https://clang.llvm.org) or the
 
 #### Miscellaneous Clang Crashes Fixed
 
+- Fixes a crash when using the pseudo-destructor for an enum without definition
+  through substitution in a template. (#GH209808)
+
 ### OpenACC Specific Changes
 
 ### OpenCL Specific Changes
diff --git a/clang/lib/Sema/SemaCXXScopeSpec.cpp b/clang/lib/Sema/SemaCXXScopeSpec.cpp
index 00a566cfab7b0..58da58ca3c899 100644
--- a/clang/lib/Sema/SemaCXXScopeSpec.cpp
+++ b/clang/lib/Sema/SemaCXXScopeSpec.cpp
@@ -41,7 +41,7 @@ static CXXRecordDecl *getCurrentInstantiationOf(QualType T,
 
 DeclContext *Sema::computeDeclContext(QualType T) {
   if (!T->isDependentType())
-    if (auto *D = T->getAsTagDecl())
+    if (auto *D = T->getAsRecordDecl())
       return D;
   return ::getCurrentInstantiationOf(T, CurContext);
 }
diff --git a/clang/test/SemaTemplate/destructor-template.cpp b/clang/test/SemaTemplate/destructor-template.cpp
index 734269e854e5d..ba98a440ae155 100644
--- a/clang/test/SemaTemplate/destructor-template.cpp
+++ b/clang/test/SemaTemplate/destructor-template.cpp
@@ -119,3 +119,10 @@ X::typo<T>::typ0::~typ0() {} // expected-error {{no member named 'typ0'}} \
                              // expected-error {{no type named 'typ0'}}
 
 }
+
+namespace GH209908 {
+  template <class T> using X = decltype(T().~E());
+  // expected-error at -1 {{undeclared identifier 'E' in destructor name}}
+  enum E : int;
+  using Z = X<E>; // expected-note {{requested here}}
+} // namespace GH209908