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int64_of_big_int fails on negative values that fit in 32-bits #4804

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vicuna opened this issue May 22, 2009 · 1 comment
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int64_of_big_int fails on negative values that fit in 32-bits #4804

vicuna opened this issue May 22, 2009 · 1 comment
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@vicuna
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vicuna commented May 22, 2009

Original bug ID: 4804
Reporter: davidgay
Status: closed (set by @xavierleroy on 2009-05-24T19:49:59Z)
Resolution: fixed
Priority: normal
Severity: minor
Version: 3.11.0
Fixed in version: 3.11.1+dev
Category: ~DO NOT USE (was: OCaml general)

Bug description

The following code:
open Big_int

let x = minus_big_int (power_int_positive_int 2 31)
let y = int64_of_big_int x

;;

Printf.printf "%s %Ld\n" (string_of_big_int x) y

produces

$ ocaml nums.cma foo.ml
Exception: Failure "int64_of_big_int".

Additional information

Seems to affect values between -2^31 and -2^32
@vicuna
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vicuna commented May 24, 2009

Comment author: @xavierleroy

Fixed in 3.11 bugfix branch. Will go in 3.11.1.

@vicuna vicuna closed this as completed May 24, 2009
@vicuna vicuna added the bug label Mar 20, 2019
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@vicuna