From 05fc29f49712c641b86c8c3cfe95e6b6ae785319 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michal=20Strehovsk=C3=BD?=
 <MichalStrehovsky@users.noreply.github.com>
Date: Mon, 8 Jun 2026 12:54:50 +0900
Subject: [PATCH] Separate frozen object owning type from allocation site

Fixes #129074.

Type names ending with numbers could clash with the callsite ID.
---
 .../Compiler/DependencyAnalysis/SerializedFrozenObjectNode.cs    | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/coreclr/tools/aot/ILCompiler.Compiler/Compiler/DependencyAnalysis/SerializedFrozenObjectNode.cs b/src/coreclr/tools/aot/ILCompiler.Compiler/Compiler/DependencyAnalysis/SerializedFrozenObjectNode.cs
index fbe021414800bc..f3bb469c986942 100644
--- a/src/coreclr/tools/aot/ILCompiler.Compiler/Compiler/DependencyAnalysis/SerializedFrozenObjectNode.cs
+++ b/src/coreclr/tools/aot/ILCompiler.Compiler/Compiler/DependencyAnalysis/SerializedFrozenObjectNode.cs
@@ -34,6 +34,7 @@ public override void AppendMangledName(NameMangler nameMangler, Utf8StringBuilde
         {
             sb.Append(nameMangler.CompilationUnitPrefix).Append("__FrozenObj_"u8)
                 .Append(nameMangler.GetMangledTypeName(_owningType))
+                .Append('_')
                 .Append(_allocationSiteId.ToStringInvariant());
         }