With git 1.6.0.2 (unstable, latest) or 1.5.6.4 (stable), 'git svn fetch' outputs only 'Segmentation fault' and ends. This happens every time if installed subversion is 1.5.0 or newer (1.5.1 is in tree as stable). 'git svn init -t tags -b branches -T trunk https://eclemma.svn.sourceforge.net/svnroot/eclemma' (to create a new git svn reposiory) also ends with 'Segmentation fault'.
Please post your `emerge --info' too. Also, explain what you updated lately, specifically if and when dev-libs/apr{,-util} and sys-libs/db were recently updated, and if you then updated everything that depends on those.
and did you run revdep-rebuild ? (available in gentoolkit)
Duplicate of bug #221931, bug #223747 and bug #238586.
Duplicate as indicated by previous commenter. subversion with USE=-dso fixes this.