Can’t do Russian, but hope it is OK to interlope on this ticket rather than opening one in English. (I can use Google translate to read the responses.)
I’ve got the same problem and am seeing it on both i686 and x86_64 though it seems to affect fewer programs on 64 bit (only cupsd).
Tried the revdep-rebuild after unmerging nettle-3.1.1 (libnettle.so.6.1) and masking nettle >2.7.1-r4 and manually removing the library which had been retained because of gnutls references. The rebuild claimed that it was going to ignore the gnutls-3.3.17.1 binary package, but it didn’t seem to actually do so. When it was done it it specified that gnutls still needed to be rebuilt. I had already failed to figure out how to get emerge to ignore the gnutls binary package so I just ran an ebuild merge on gnutls-3.3.17.1 which succeeded and got my system working again.