https://bugzilla.mozilla.org/show_bug.cgi?id=2033279

https://hg-edge.mozilla.org/mozilla-central/rev/ec1dd05fd578

error[E0599]: no method named `select` found for struct `Mask<T, N>` in the current scope
  --> third_party/rust/encoding_rs/src/x_user_defined.rs:23:56

--- comm/third_party/rust/encoding_rs/src/x_user_defined.rs.orig	2026-04-20 10:54:51 UTC
+++ comm/third_party/rust/encoding_rs/src/x_user_defined.rs
@@ -16,6 +16,7 @@ cfg_if! {
         use simd_funcs::*;
         use core::simd::u16x8;
         use core::simd::cmp::SimdPartialOrd;
+        use core::simd::Select;
 
         #[inline(always)]
         fn shift_upper(unpacked: u16x8) -> u16x8 {

--- third_party/rust/encoding_rs/src/x_user_defined.rs.orig	2026-04-20 10:54:51 UTC
+++ third_party/rust/encoding_rs/src/x_user_defined.rs
@@ -16,6 +16,7 @@ cfg_if! {
         use simd_funcs::*;
         use core::simd::u16x8;
         use core::simd::cmp::SimdPartialOrd;
+        use core::simd::Select;
 
         #[inline(always)]
         fn shift_upper(unpacked: u16x8) -> u16x8 {