Using show {with_path = false} results is error

[bikallem]

I am attempting to use show {with_path = false} however, the compiler complains with the following error:
Error: non-optional labeled argument expected

The following sample code fails in both toplevel and ocamlc.
module X = struct type t = C [@@deriving show { with_path = false }] end;;

[gasche]

I am unable to reproduce it under master or v4.2 under 4.05.0, and under 4.1 and 4.04 ppx-deriving complains that show does not support option with_path. What ppx-deriving and OCaml versions are your using?

[bikallem]

I am using ocaml 4.05.0, jbuilder 1.0+beta13, and ppx_deriving 4.2

[bikallem]

@gasche I tried the following,
opam pin add ppx_deriving https://github.com/ocaml-ppx/ppx_deriving.git#master
on 4.05.0+flambda but am getting the same error. Any tips?

[copy]

It's probably this issue with ppx_type_conv: janestreet-deprecated/ppx_type_conv#9

[bikallem]

@copy Indeed, this issue seems related to ppx_type_conv and/or ppx_driver. I was using ppx_hash and ppx_compare along with ppx_deriving and I faced this issue. I removed the both ppx_hash and ppx_driver from jbuilder rules and with_path seem to work correctly.

[copy]

The fixed version of ppx_type_conv has been released in opam, so this issue can be closed now.