Created attachment 374164 [details] emerge --info emerge fail with gnupg-2.0.22 libgcrypt-1.6.0. gdb as "Bug 499338" told ,the problem is caused by libgcrypt. downgrade libgcryp-1.6.0 to libgcrypt-1.5.3 , emerge gnupg is ok.
Created attachment 374166 [details] build.log
*** This bug has been marked as a duplicate of bug 499338 ***