Re: Another memory leak in Pari/GP 2.2.5

[Justin Walker <justin@mac.com>]

On Tuesday, Mar 18, 2003, at 10:41 US/Pacific, Alexander Shumakovitch 
wrote:

> Hi all!
>
> I guess I've found a memory leak in Pari 2.2.5 (on Linux 2.4.20). Here
> is how to reproduce it:
>   (19:36) gp > x = vector(2); y = vectorv(2);
>   time = 0 ms.
>   (19:36) gp > m = matrix(2,2); m[2, ] = x; m[, 2] = y; getheap
>   time = 0 ms.
>   %2 = [7, 77]
[snip]
> The histsize is set to 1, so history is not an issue. What is
> interesting is that if one switches the assignments or skips one of
> them, everything goes back to normal:
[snip]

I don't see quite the same behavior:
? m = matrix(2,2); m[, 2] = y; m[2, ] = x; getheap
time = 0 ms.
%18 = [107, 655]
? getheap             \\ A number of 'getheap's in a row, no other 
commands...
time = 0 ms.
%25 = [114, 746]
? getheap
time = 0 ms.
%26 = [115, 759]
                      \\ This does not let things go back to normal...
? m = matrix(2,2); m[, 2] = y; m[2, ] = x; getheap
time = 0 ms.
%27 = [116, 772]
? m = matrix(2,2); m[, 2] = y; m[2, ] = x; getheap
time = 0 ms.
%28 = [117, 785]
? m = matrix(2,2); m[, 2] = y; m[2, ] = x;
time = 0 ms.
? m = matrix(2,2); m[, 2] = y; m[2, ] = x;
time = 0 ms.
? m = matrix(2,2); m[, 2] = y; m[2, ] = x;
time = 0 ms.
? getheap
time = 0 ms.
%32 = [121, 831]

This is the version info (this is up to date with CVS as of 3/11):

>           GP/PARI CALCULATOR Version 2.2.6 (development CHANGES-1.704)
>                   powerpc (PPC/GMP-4.1 kernel) 32-bit version
>                compiled: 03/11/03, gcc-3.1 20020420 (prerelease)
>                 (readline v4.1 enabled, extended help available)
>
>                        Copyright (C) 2003 The PARI Group
>
> PARI/GP is free software, covered by the GNU General Public License, 
> and
> comes WITHOUT ANY WARRANTY WHATSOEVER.
>
> Type ? for help, \q to quit.
> Type ?12 for how to get moral (and possibly technical) support.
>
>    realprecision = 28 significant digits
>    seriesprecision = 16 significant terms
>    format = g0.28
>
> parisize = 4000000, primelimit = 500000

Regards,

Justin

--
Justin C. Walker, Curmudgeon-At-Large  *
Institute for General Semantics        | It's not whether you win or 
lose...
                                       |  It's whether *I* win or lose.
*--------------------------------------*-------------------------------*