missing-sc-barrier.diff

diff --git a/src/core/interp.c b/src/core/interp.c
index 4921dc357..34fc3e828 100644
--- a/src/core/interp.c
+++ b/src/core/interp.c
@@ -5133,9 +5133,11 @@ void MVM_interp_run(MVMThreadContext *tc, void (*initial_invoke)(MVMThreadContex
             OP(DEPRECATED_44):
                 MVM_exception_throw_adhoc(tc, "Specializer plugins are no longer supported");
             OP(atomicbindattr_o):
-                MVM_repr_atomic_bind_attr_o(tc, GET_REG(cur_op, 0).o,
+                MVMObject *obj = GET_REG(cur_op, 0).o;
+                MVM_repr_atomic_bind_attr_o(tc, obj,
                     GET_REG(cur_op, 2).o, GET_REG(cur_op, 4).s,
                     GET_REG(cur_op, 6).o);
+                MVM_SC_WB_OBJ(tc, obj);
                 cur_op += 8;
                 goto NEXT;
             OP(casattr_o):

src/core/interp.c: In function ‘MVM_interp_run’:
src/core/interp.c:5137:17: error: a label can only be part of a statement and a declaration is not a statement
 5137 |                 MVMObject *obj = GET_REG(cur_op, 0).o;
      |                 ^~~~~~~~~