[Assist] IceCat: SIGSEGV in safe mode: How to debug?

[Rudolf Dovičín]

I try to build it by/from
https://git.parabola.nu/abslibre.git/tree/libre/icecat

I have downloaded file
https://git.parabola.nu/abslibre.git/plain/libre/icecat/PKGBUILD
to my computer in directory
~/Debug/icecat

I run command:
LANG=C; LC_ALL=C; makepkg
==> Making package: icecat 52.6.0_gnu1-4 (Wed Oct  3 00:03:23 2018)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving sources...
  -> Found icecat-52.6.0-gnu1.tar.bz2
  -> Found icecat-52.6.0-gnu1.tar.bz2.sig
==> ERROR: icecat.desktop was not found in the build directory and is not a URL.

It probably wants all files from:
https://git.parabola.nu/abslibre.git/tree/libre/icecat/

I try to get it by:
git clone git://git.parabola.nu/abslibre.git/tree/libre/icecat
Cloning into 'icecat'...
fatal: remote error: access denied or repository not exported:
/abslibre.git/tree/libre/icecat

(I do not know git, because I currently do not want to contribute
there, I want only download missing filles for icecat.)

Yes, I know, I can manually download them from:
https://git.parabola.nu/abslibre.git/plain/libre/icecat/
but it is withouth checking etc...

Please, where is the error or how can I continue to build icecat with
debugging symbols for error (SIGSEGV) reporting?
-- 
Rudolf Dovičín
Matice slovenskej 1260/4-7
957 04  Bánovce nad Bebravou 4
SLOVENSKO
mailto:Rudolf.Dovicin at Gmail.com
(cellular: +421 940 872 846, short messages only)