Not able to compile in ReScript 11

[FilipKittnar]

What I have:

"rescript": "^11.0.0-beta.4",
"@greenlabs/ppx-spice": "^0.2.0",

Also, in bsconfig:

  "bs-dependencies": ["@greenlabs/ppx-spice"],
  "ppx-flags": ["@greenlabs/ppx-spice/ppx"],

When I add your basic example to any module:

@spice
type user = {
  id: int,
  nickname?: string,
}

I get this error:

FAILED: types/Types_Vehicle.cmj

  Warning number 4 (configured as error) 
  /home/ab01234/app/types/Types_Vehicle.res

  this pattern-matching is fragile.
It will remain exhaustive when constructors are added to type Js_json.t.

FAILED: cannot make progress due to previous errors.
>>>> Finish compiling(exit: 1)

I have no idea what to do about this and how to make it work.

[mununki]

Can you share the bsconfig? Are you using uncurried mode?

[FilipKittnar]

Sure,

{
  "name": "pns-app",
  "jsx": {
    "version": 4,
    "mode": "automatic"
  },
  "bsc-flags": ["-bs-super-errors", "-open RescriptStruct"],
  "sources": [
    {
      "dir": "app",
      "subdirs": true
    },
    {
      "dir": "components",
      "subdirs": true
    },
    {
      "dir": "utils",
      "subdirs": true
    },
    {
      "dir": "bindings",
      "subdirs": true
    },
    {
      "dir": "types",
      "subdirs": true
    }
  ],
  "package-specs": [
    {
      "module": "es6",
      "in-source": true
    }
  ],
  "suffix": ".bs.js",
  "bs-dependencies": ["@rescript/react", "@glennsl/rescript-fetch", "@greenlabs/ppx-spice"],
  "ppx-flags": ["@greenlabs/ppx-spice/ppx"],
  "warnings": {
    "number": "+A-42-48",
    "error": "+A-3-44-102-103"
  },
  "reanalyze": {
    "analysis": ["dce", "exception", "termination"],
    "suppress": [],
    "unsuppress": []
  }
}

[FilipKittnar]

And by the way, I cannot do this:

"ppx-flags": ["@greenlabs/ppx-spice/ppx", "-uncurried"],

That causes this with pretty much every module:

FAILED: app/about/Page_About.ast
sh: 0: Illegal option -r

We've found a bug for you!
/home/pc00123/development/renault/pns/app/app/about/Page_About.res

Error while running external preprocessor
Command line: -uncurried '/tmp/ppx1f3aebPage_About.res' '/tmp/ppxbf90dfPage_About.res'

rescript: [2/66] components/atoms/logo/Components_Atoms_Logo.ast

[mununki]

At a guess, it sounds like you're not able to use uncurried mode, so let me make it reproducible.

[FilipKittnar]

BTW, I tried to turn off the uncurried mode:

"uncurried": false,

but I'm still getting:

FAILED: types/Types_Vehicle.cmj

  Warning number 4 (configured as error) 
  /home/pc00123/development/renault/pns/app/types/Types_Vehicle.res

  this pattern-matching is fragile.
It will remain exhaustive when constructors are added to type Js_json.t.

FAILED: cannot make progress due to previous errors.

[FilipKittnar]

I figured it out!
I like to be a little bit more strict with my ReScript warnings and errors and this is a configuration I use on all my projects:

  "warnings": {
    "number": "+A-42-48",
    "error": "+A-3-44-102-103"
  },

So the reason is that your code contains warning 4.
I will tweak my configuration so that spice compiles for me, but I really like especially warning 4 to be marked as an error. What do you think? Do you plan to deal with this warning?

[mununki]

Not for now, but definitely worth checking out. Thanks for letting me know.