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Unbound variable after pattern with gadt #5490

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vicuna opened this issue Jan 20, 2012 · 1 comment
Closed

Unbound variable after pattern with gadt #5490

vicuna opened this issue Jan 20, 2012 · 1 comment
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@alainfrisch
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@vicuna
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vicuna commented Jan 20, 2012

Original bug ID: 5490
Reporter: @diml
Assigned to: @alainfrisch
Status: closed (set by @xavierleroy on 2013-08-31T10:46:04Z)
Resolution: fixed
Priority: normal
Severity: major
Version: 3.13.0+dev
Category: ~DO NOT USE (was: OCaml general)
Monitored by: mehdi

Bug description

The following code produce an error with trunk:

type t = A : t

let f () =
let A = A in
let x = 0 in
x

File "toto.ml", line 4, characters 2-33:
Error: Unbound value x

I did a git bisect and the bug appears at commit 12050.
@vicuna
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vicuna commented Jan 20, 2012

Comment author: @alainfrisch

Fixed in rev 12059.

The code was probably buggy before the commit you mention, because the analysis of free identifiers in Unused_var was incomplete (but now it is more incomplete, so the error was simpler to trigger).

@vicuna vicuna closed this as completed Aug 31, 2013
@vicuna vicuna added the bug label Mar 20, 2019
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@alainfrisch @vicuna