utf_8tests is linked to an old version of libicu (version 50.2) $ ldd tests/utf8_test linux-vdso.so.1 => (0x00007fff3a3ca000) libboost_program_options.so.1.74.0 => /home/cs-vand1/src/cirrus-scripts/env/lib64/libboost_program_options.so.1.74.0 (0x00002b13e48db000) libboost_syst...