Comment 36 for bug 852760

Note the issue is really in libidn and the reproducer needs libidn-devel (and libidn-debuginfo) installed.

The workaround is to run with --partial-loads-ok=yes

       --partial-loads-ok=<yes|no> [default: no]
           Controls how Memcheck handles 32-, 64-, 128- and 256-bit naturally
           aligned loads from addresses for which some bytes are addressable
           and others are not. When yes, such loads do not produce an address
           error. Instead, loaded bytes originating from illegal addresses are
           marked as uninitialised, and those corresponding to legal addresses
           are handled in the normal way.

           When no, loads from partially invalid addresses are treated the
           same as loads from completely invalid addresses: an illegal-address
           error is issued, and the resulting bytes are marked as initialised.

           Note that code that behaves in this way is in violation of the ISO
           C/C++ standards, and should be considered broken. If at all
           possible, such code should be fixed. This option should be used
           only as a last resort.