where to report bugs found using systems used by sage?

edit

I am finding lots of bugs in systems used by sageMath. So not sure if I should report them to sagebug tracking as I have been doing, or to the other systems. The problem I can't find a place to report them for the other systems.

For example

>sage
┌────────────────────────────────────────────────────────────────────┐
│ SageMath version 8.3.rc0, Release Date: 2018-07-08                 │
│ Type "notebook()" for the browser-based notebook interface.        │
│ Type "help()" for help.                                            │
└────────────────────────────────────────────────────────────────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Warning: this is a prerelease version, and it may be unstable.     ┃
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
sage: var('x d a c b')
(x, d, a, c, b)
sage: integrate(sqrt(d*x^2 + e*x + c)*sqrt((b*x^2 + a)^2)/x^4,x, algorithm="giac")
Giac crashed -- automatically restarting.
sage0*x

#another bug. Just Added also as new comment ticket
# at  https://trac.sagemath.org/ticket/25822

sage: var('x g b f n c a d');
sage: integrate(1/((g*x + f)^2*(b*log((e*x + d)^n*c) + a)^3),x, algorithm="giac")
Done

I searched and searched, and can't find even a forum for Giac or a place to report a bug. is giac even supported system? I went to https://www-fourier.ujf-grenoble.fr/~... and I see no place to report bugs. I clicked on the forum link there, but it is dead link.

Same for Maxima. I can't find where to report bugs found it is when using sagemath.

┌────────────────────────────────────────────────────────────────────┐
│ SageMath version 8.3.rc0, Release Date: 2018-07-08                 │
│ Type "notebook()" for the browser-based notebook interface.        │
│ Type "help()" for help.                                            │
└────────────────────────────────────────────────────────────────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Warning: this is a prerelease version, and it may be unstable.     ┃
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛

var('x')
integrate(log(sin(x))*sin(x)^2,x)

;;;
;;; Detected access to protected memory, also kwown as 'bus or segmentation fault'.
;;; Jumping to the outermost toplevel prompt
;;;

I once send email about a different maxima bug to maxima-bugs@lists.sourceforge.net but never heared back and I do not see it posted on anywhere on sourceforge. I do not think any one reads these.

May be sagemath should have an OFFICIAL web page, listing the exact location of where to report bugs found in systems used by sagemath if they are not to be reported to sagemath bug database?