Dear Maintainer, Lately, strace has been printing a warning whenever I start it: $ /usr/bin/strace /usr/bin/strace: Symbol `_UPT_accessors' has different size in shared object, consider re-linking /usr/bin/strace: must have PROG [ARGS] or -p PID Try '/usr/bin/strace -h' for more information. $ ldd /usr/bin/strace linux-vdso.so.1 (0x00007fa057af1000) libunwind-ptrace.so.0 => /lib/x86_64-linux-gnu/libunwind-ptrace.so.0 (0x00007fa057ac5000) libunwind-x86_64.so.8 => /lib/x86_64-linux-gnu/libunwind-x86_64.so.8 (0x00007fa057aa7000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fa05760a000) liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5 (0x00007fa057a77000) libunwind.so.8 => /lib/x86_64-linux-gnu/libunwind.so.8 (0x00007fa057a5b000) /lib64/ld-linux-x86-64.so.2 (0x00007fa057af3000) $ Except for this warning, it appears to work normally. It looks like the message is printed by glibc and is related to libunwind. - Michael