1 files changed, 2 insertions, 1 deletions
diff --git a/compiler/rustc_codegen_ssa/src/target_features.rs b/compiler/rustc_codegen_ssa/src/target_features.rs
index ee1d548b231..241b0a15f78 100644
--- a/compiler/rustc_codegen_ssa/src/target_features.rs
+++ b/compiler/rustc_codegen_ssa/src/target_features.rs
@@ -106,7 +106,8 @@ fn asm_target_features(tcx: TyCtxt<'_>, did: DefId) -> &FxIndexSet<Symbol> {
         match attrs.instruction_set {
             None => {}
             Some(InstructionSetAttr::ArmA32) => {
-                target_features.remove(&sym::thumb_mode);
+                // FIXME(#120456) - is `swap_remove` correct?
+                target_features.swap_remove(&sym::thumb_mode);
             }
             Some(InstructionSetAttr::ArmT32) => {
                 target_features.insert(sym::thumb_mode);