author: Andres Salomon <dilinger@debian.org>

work around the following build error (likely required by a newer rustc):

ld.lld-19: error: undefined symbol: __rust_no_alloc_shim_is_unstable
>>> referenced by raw_vec.rs:0 (library/alloc/src/raw_vec.rs:0)
>>>               std-204c535bb1c72e7d.std.83f6108400cae6c8-cgu.04.rcgu.o:(core::slice::sort::stable::driftsort_main::h2af4412729044fb7) in archive prebuilt_rustc_sysroot/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd.rlib

This reverts commit 8393b61ba876c8e1614275c97767f9b06b889f48
Author: Hans Wennborg <hans@chromium.org>
Date:   Mon Jun 30 07:45:33 2025 -0700

    [rust] Remove __rust_no_alloc_shim_is_unstable

--- a/build/rust/allocator/lib.rs
+++ b/build/rust/allocator/lib.rs
@@ -96,7 +96,19 @@ mod both_allocators {
         0
     }
 
+    // TODO(crbug.com/422538133) Remove after rolling past
+    // https://github.com/rust-lang/rust/pull/141061
+    #[unsafe(no_mangle)]
+    #[linkage = "weak"]
+    static __rust_no_alloc_shim_is_unstable: u8 = 0;
+
     // Mangle the symbol name as rustc expects.
+    // TODO(crbug.com/440481922): Remove this after rolling past https://github.com/rust-lang/rust/pull/143387
+    #[rustc_std_internal_symbol]
+    #[allow(non_upper_case_globals)]
+    #[linkage = "weak"]
+    static __rust_alloc_error_handler_should_panic: u8 = 0;
+
     #[rustc_std_internal_symbol]
     #[allow(non_upper_case_globals)]
     #[linkage = "weak"]