From 4ef5e766615930ac3ddfa992da0ad5799e90e6df Mon Sep 17 00:00:00 2001
From: maximusron <aaronjomyjoseph@gmail.com>
Date: Thu, 4 Apr 2024 12:30:53 +0200
Subject: [PATCH] Check scope before casting to CXXRecordDecl

---
 lib/Interpreter/CppInterOp.cpp | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/lib/Interpreter/CppInterOp.cpp b/lib/Interpreter/CppInterOp.cpp
index cd5d30175..269b585a6 100644
--- a/lib/Interpreter/CppInterOp.cpp
+++ b/lib/Interpreter/CppInterOp.cpp
@@ -727,18 +727,20 @@ namespace Cpp {
       if (auto* TD = dyn_cast<TypedefNameDecl>(D))
         D = GetScopeFromType(TD->getUnderlyingType());
 
-      if (auto* CXXRD = dyn_cast_or_null<CXXRecordDecl>(D)) {
+      if (D && isa<CXXRecordDecl>(D)) {
+        auto* CXXRD = dyn_cast<CXXRecordDecl>(D);
         getSema().ForceDeclarationOfImplicitMembers(CXXRD);
-        for (Decl* DI : CXXRD->decls()) {
-          if (auto* MD = dyn_cast<CXXMethodDecl>(DI))
-            methods.push_back(MD);
-          else if (auto* USD = dyn_cast<UsingShadowDecl>(DI))
-            if (auto* MD = dyn_cast<CXXMethodDecl>(USD->getTargetDecl()))
+          for (Decl* DI : CXXRD->decls()) {
+            if (auto* MD = dyn_cast<CXXMethodDecl>(DI))
               methods.push_back(MD);
+            else if (auto* USD = dyn_cast<UsingShadowDecl>(DI))
+              if (auto* MD = dyn_cast<CXXMethodDecl>(USD->getTargetDecl()))
+                methods.push_back(MD);
         }
       }
     }
   }
+  
 
   void GetFunctionTemplatedDecls(TCppScope_t klass,
                                  std::vector<TCppFunction_t>& methods) {
@@ -748,7 +750,8 @@ namespace Cpp {
       if (auto* TD = dyn_cast<TypedefNameDecl>(D))
         D = GetScopeFromType(TD->getUnderlyingType());
 
-      if (auto* CXXRD = dyn_cast_or_null<CXXRecordDecl>(D)) {
+      if (D && isa<CXXRecordDecl>(D)) {
+        auto* CXXRD = dyn_cast<CXXRecordDecl>(D);
         getSema().ForceDeclarationOfImplicitMembers(CXXRD);
         for (Decl* DI : CXXRD->decls()) {
           if (auto* MD = dyn_cast<FunctionTemplateDecl>(DI))
@@ -760,6 +763,7 @@ namespace Cpp {
       }
     }
   }
+  
 
   bool HasDefaultConstructor(TCppScope_t scope) {
     auto *D = (clang::Decl *) scope;
@@ -1009,7 +1013,7 @@ namespace Cpp {
 
     return {};
   }
-  
+
   TCppFunction_t
   BestTemplateFunctionMatch(const std::vector<TCppFunction_t>& candidates,
                             const std::vector<TemplateArgInfo>& explicit_types,