================
@@ -1411,3 +1414,35 @@ clang::Decl *
 ClangASTImporter::ASTImporterDelegate::GetOriginalDecl(clang::Decl *To) {
   return m_main.GetDeclOrigin(To).decl;
 }
+
+void ClangASTImporter::ASTImporterDelegate::UpdateImportProgress(
----------------
bulbazord wrote:

The assertions in this code are going to blow up only in development builds. In 
release builds, you'll fall through the first assertion, and return because you 
try to cast `nullptr` to a NamedDecl (which will give you `nullptr`) and the 
function will fail silently. The second assertion will fail if `from_ast` or 
`to_ast` is `nullptr`, but the function doesn't return early there. It will 
call `getDisplayName` on `from_ast` and `to_ast`, one of which will crash 
anyway. Maybe we should consider an early return here too? Or maybe the 
function should return an `llvm::Error`?

https://github.com/llvm/llvm-project/pull/91452
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