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bug in polymorphic variants #2377

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vicuna opened this issue Feb 25, 2000 · 2 comments
Closed

bug in polymorphic variants #2377

vicuna opened this issue Feb 25, 2000 · 2 comments
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@vicuna
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vicuna commented Feb 25, 2000

Original bug ID: 42
Reporter: administrator
Status: closed
Resolution: fixed
Priority: normal
Severity: minor
Category: ~DO NOT USE (was: OCaml general)

Bug description

The following interaction with the environment manifests a bug in Ocaml 2.99
on Windows NT :

let f : unit -> [A|B] = function () -> `A;;

val f : unit -> [A|B] =

let x = match f() with A->2 | B->3 | `C->4;;

Uncaught exception: Not_found

I was expecting to get a warning about the useless match clause (`C) and for
x to be bound to 2. Instead, I get the weird exception and I get kicked out
of the Ocaml environment and back to the shell prompt.

The following interaction with the environment manifests a bug in Ocaml 2.99 on Windows NT :
 
# let f : unit -> [`A|`B] = function () -> `A;;
val f : unit -> [`A|`B] = <fun>
# let x = match f() with `A->2 | `B->3 | `C->4;;
Uncaught exception: Not_found

I was expecting to get a warning about the useless match clause (`C) and for x to be bound to 2. Instead, I get the weird exception and I get kicked out of the Ocaml environment and back to the shell prompt.
 
@vicuna
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vicuna commented Feb 28, 2000

Comment author: administrator

let f : unit -> [A|B] = function () -> `A;;

val f : unit -> [A|B] =

let x = match f() with A->2 | B->3 | `C->4;;

Uncaught exception: Not_found

This bug is already corrected in the CVS version.
There were a number of bad variant bugs in ocaml-2.99, so you have better
wait for ocaml-3.00 if you intend to heavily use them.

Thank you for the report anyway,

Jacques

@vicuna
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vicuna commented Feb 28, 2000

Comment author: administrator

Fixed in 3.00

@vicuna vicuna closed this as completed Feb 28, 2000
@vicuna vicuna added the bug label Mar 19, 2019
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@vicuna