Has anyone encountered a build problem /usr/bin/strip: /builddir/build/BUILDROOT/here-is-full-path-to-file.so: file truncated ?

[Mikhail Gavrilov]

Has anyone encountered a build problem /usr/bin/strip:
/builddir/build/BUILDROOT/here-is-full-path-to-file.so: file truncated ?
I have this problem regularly when I building mesa from git for the i686 architecture.
And the same spec file is successfully builded for the x86_64 architecture.
What's even stranger is that when I call the `strip` command manually for problematic
file from the command line, there are no errors. 

For exapmple:
$ sudo /usr/bin/systemd-nspawn -q --ephemeral -D
/var/lib/mock/fedora-rawhide-i386-bootstrap/root
[root@root-25096e82fbde3423 ~]# /usr/bin/strip
/builddir/build/BUILDROOT/mesa-21.2.0-0.3.20210428.0.7ae0719.fc35.i386/usr/lib/dri/nouveau_dri.so
[root@root-25096e82fbde3423 ~]# echo $?
0

I don't understand how to solve this build problem :( 
I fill bugreport https://bugzilla.redhat.com/show_bug.cgi?id=1954321 but mainteiner mock
package said me that fedora devel list is a proper place.