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Ocaml does not warn about invalid wildcard uses #4717

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vicuna opened this Issue Feb 13, 2009 · 0 comments

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vicuna commented Feb 13, 2009

Original bug ID: 4717
Status: closed (set by @damiendoligez on 2009-12-08T16:50:06Z)
Resolution: fixed
Priority: normal
Severity: minor
Version: 3.11.0
Fixed in version: 3.12.0+dev
Category: ~DO NOT USE (was: OCaml general)
Duplicate of: #4675
Has duplicate: #4835
Child of: #4052
Monitored by: "Richard Jones"

Bug description

the following code:

let f = function
| Some x -> x
| None _ -> 0;;

yields an error using OCaml 3.10.2 but compiles fine using OCaml 3.11.0 (Linux platform)

Additional information

Objective Caml version 3.10.2

let f = function

| Some x -> x
| None _ -> 0;;

Characters 39-45:
| None _ -> 0;;
^^^^^^
The constructor None expects 0 argument(s),
but is here applied to 1 argument(s)

    Objective Caml version 3.11.0

let f = function

| Some x -> x
| None _ -> 0;;

val f : int option -> int =

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