From aea9a3c3ec679867feb9c6d2dfc96b9bb735f5a6 Mon Sep 17 00:00:00 2001
From: bjorn3 <17426603+bjorn3@users.noreply.github.com>
Date: Sat, 2 Dec 2023 14:18:30 +0000
Subject: [PATCH] Add temporary back compat hack for rust-for-linux

---
 compiler/rustc_symbol_mangling/src/v0.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/compiler/rustc_symbol_mangling/src/v0.rs b/compiler/rustc_symbol_mangling/src/v0.rs
index 73ddeb5012f5..348805b01265 100644
--- a/compiler/rustc_symbol_mangling/src/v0.rs
+++ b/compiler/rustc_symbol_mangling/src/v0.rs
@@ -69,6 +69,12 @@ pub(super) fn mangle<'tcx>(
 }
 
 pub fn mangle_internal_symbol<'tcx>(tcx: TyCtxt<'tcx>, item_name: &str) -> String {
+    if item_name == "__rust_no_alloc_shim_is_unstable" {
+        // Temporary back compat hack to give people the chance to migrate to
+        // include #[rustc_std_internal_symbol].
+        return "__rust_no_alloc_shim_is_unstable".to_owned();
+    }
+
     let prefix = "_R";
     let mut cx: SymbolMangler<'_> = SymbolMangler {
         tcx,