please upgrade to 4.7 - version 4.5.20 is almost 3 years old
I'm currently experiencing a bug in strace 4.5.20 running on an armhf system: https:/
This bug is fixed in strace version 4.7. Please pull in version 4.7 of strace for Raring.
4.5.20 was released in April 2010, so it's almost three years old.