Re: Cosmic ray hits integerset - Mailing list pgsql-hackers

From Alvaro Herrera
Subject Re: Cosmic ray hits integerset
Date
Msg-id 202106221421.vdpzdeox3u43@alvherre.pgsql
Whole thread Raw
In response to Cosmic ray hits integerset  (Thomas Munro <thomas.munro@gmail.com>)
Responses Re: Cosmic ray hits integerset
RE: Cosmic ray hits integerset
List pgsql-hackers
On 2021-Jun-22, Thomas Munro wrote:

> Hi,
> 
> Here's a curious one-off failure in test_integerset:
> 
> +ERROR:  iterate returned wrong value; got 519985430528, expected 485625692160

Cosmic rays indeed.  The base-2 representation of the expected value is
111000100010001100011000000000000000000
and that of the actual value is
111100100010001100011000000000000000000

There's a single bit of difference.

-- 
Álvaro Herrera       Valdivia, Chile
"No hay hombre que no aspire a la plenitud, es decir,
la suma de experiencias de que un hombre es capaz"



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