It's not about types or consts, but the lack of regions

compiler/rustc_hir_analysis/src/check/intrinsicck.rs

@@ -149,7 +149,7 @@ impl<'a, 'tcx> InlineAsmCtxt<'a, 'tcx> {
         target_features: &FxHashSet<Symbol>,
     ) -> Option<InlineAsmType> {
         let ty = (self.get_operand_ty)(expr);
-        if ty.has_infer_types_or_consts() {
+        if ty.has_non_region_infer() {
             bug!("inference variable in asm operand ty: {:?} {:?}", expr, ty);
         }
         let asm_ty_isize = match self.tcx.sess.target.pointer_width {