fix

Author: BobTheBuidler

mypyc/irbuild/specialize.py

@@ -1018,10 +1018,12 @@ def specialize_int_to_bytes(builder: IRBuilder, expr: CallExpr, callee: RefExpr)
         signed_arg = builder.accept(expr.args[2])
     else:
         return None
+    if not isinstance(callee, MemberExpr):
+        return None
     self_arg = builder.accept(callee.expr)
     length_arg = builder.accept(expr.args[0])
     byteorder_expr = expr.args[1]
-    if not isinstance(callee, MemberExpr) or not is_str_rprimitive(builder.node_type(byteorder_expr)):
+    if not is_str_rprimitive(builder.node_type(byteorder_expr)):
         return None
     if isinstance(byteorder_expr, StrExpr):
         if byteorder_expr.value == "little":