Qalculate SIGABRTs with exp($large_number)

[Alexander Jones]

Binary package hint: qalculate

alex@fizz:~$ qalc
> exp(1)

  exp(1) = approx. 2.7182818

> exp(1E10)
terminate called after throwing an instance of 'cln::runtime_exception'
  what(): Out of virtual memory.
Aborted
alex@fizz:~$ qalc
> exp(-1E10)
terminate called after throwing an instance of 'cln::runtime_exception'
  what(): Not a 32-bit integer: 14426950664
Aborted

Also affects the GTK version.

ProblemType: Bug
Architecture: amd64
Date: Fri May 23 18:13:13 2008
Dependencies:

DistroRelease: Ubuntu 8.04
NonfreeKernelModules: ath_hal nvidia
Package: qalculate None [modified: /var/lib/dpkg/info/qalculate.list]
PackageArchitecture: all
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: qalculate-gtk
Uname: Linux 2.6.24-17-generic x86_64

[Marcel Stimberg (marcelstimberg)]

Confirming this for the current version (0.9.6-2). Although I get different error messages on my 32 bit system:

terminate called after throwing an instance of 'cln::floating_point_overflow_exception'
  what(): floating point overflow.

for exp(1e10) and the same with "underflow" for exp(-1e10).
As this problem also occurs with qalculate from the developer homepage, I forwarded this bug upstream.

[Marcel Stimberg (marcelstimberg)]

Sorry, forgot the link:
http://sourceforge.net/tracker/index.php?func=detail&aid=1971494&group_id=86696&atid=580546

[Alexander Jones (alex-weej)]

Thanks for that, Marcel. I'm too lazy to report stuff upstream myself. :P

[Dave Gilbert (ubuntu-treblig)]

Confirmed on 0.9.7-3ubuntu1 on Quantal.

The -ve one still aborts/core dumps with the Not a 32-bit integer.

The exp(1E10) sits there using vast amounts of memory, and I gave up waiting.
(I wouldn't want to limit the upper size it could work at on a suitably capable machine, so I'm not sure I regard the postiive case as a bug).

[Lyn Perrine (walterorlin)]

I still get this same result trying to calculate this with 16 GB of ram.