[clang] [clang] assert fail when number of arguments in pack exceed implement… (PR #74220)

[via cfe-commits]

https://github.com/wheatman created https://github.com/llvm/llvm-project/pull/74220

…ation limit

>From 8990877d381639d8498630fd4e9b30732ab893d6 Mon Sep 17 00:00:00 2001
From: Brian Wheatman <bwheatman at gmail.com>
Date: Sat, 2 Dec 2023 22:17:24 -0500
Subject: [PATCH] [clang] assert fail when number of arguments in pack exceed
 implementation limit

---
 clang/lib/AST/ExprCXX.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/clang/lib/AST/ExprCXX.cpp b/clang/lib/AST/ExprCXX.cpp
index 83af7998f6833..5798321ea59f3 100644
--- a/clang/lib/AST/ExprCXX.cpp
+++ b/clang/lib/AST/ExprCXX.cpp
@@ -1681,6 +1681,7 @@ SubstNonTypeTemplateParmPackExpr::SubstNonTypeTemplateParmPackExpr(
       AssociatedDecl(AssociatedDecl), Arguments(ArgPack.pack_begin()),
       NumArguments(ArgPack.pack_size()), Index(Index), NameLoc(NameLoc) {
   assert(AssociatedDecl != nullptr);
+  assert(NumArguments == ArgPack.pack_size() && "number of arguments in a pack exceeded implementation limit");
   setDependence(ExprDependence::TypeValueInstantiation |
                 ExprDependence::UnexpandedPack);
 }