get parsing errors details?

[mudrz]

when I run dune exec ... (even with --verbose) if the json format differs from the defined type I get errors like:

!Fatal error: exception Ppx_yojson_conv_lib__Yojson_conv.Of_yojson_error(_, _)
Raised at Ppx_yojson_conv_lib__Yojson_conv.of_yojson_error in file "yojson_conv.ml", line 57, characters 34-80
Called from Dune__exe__Json.user_of_yojson.(fun).iter in file "..."

Is it possible somehow to get more details for the error, for example:

• the name of the field that failed parsing
• the expected type and the actual type
  ?

[dylanirlbeck]

This would be very helpful! I'm also encountering this as I build out an API client.