https://github.com/tbaederr created 
https://github.com/llvm/llvm-project/pull/177148

None

>From 33cc35bddaeaac62ee0d4f76f8c54758c6343cc3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Timm=20B=C3=A4der?= <[email protected]>
Date: Wed, 21 Jan 2026 12:46:06 +0100
Subject: [PATCH] [clang][bytecode][NFC] Use a ListSeparator to print
 backtraces

---
 clang/lib/AST/ByteCode/InterpFrame.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/clang/lib/AST/ByteCode/InterpFrame.cpp 
b/clang/lib/AST/ByteCode/InterpFrame.cpp
index 3b883761ad001..5d645feb5579d 100644
--- a/clang/lib/AST/ByteCode/InterpFrame.cpp
+++ b/clang/lib/AST/ByteCode/InterpFrame.cpp
@@ -191,15 +191,15 @@ void InterpFrame::describe(llvm::raw_ostream &OS) const {
   Off += Func->hasRVO() ? primSize(PT_Ptr) : 0;
   Off += Func->hasThisPointer() ? primSize(PT_Ptr) : 0;
 
+  llvm::ListSeparator Comma;
   for (unsigned I = 0, N = F->getNumParams(); I < N; ++I) {
+    OS << Comma;
     QualType Ty = F->getParamDecl(I)->getType();
 
     PrimType PrimTy = S.Ctx.classify(Ty).value_or(PT_Ptr);
 
     TYPE_SWITCH(PrimTy, print(OS, stackRef<T>(Off), S.getASTContext(), Ty));
     Off += align(primSize(PrimTy));
-    if (I + 1 != N)
-      OS << ", ";
   }
   OS << ")";
 }

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