Newer Perl or IPC::Run versions default to appending the filename to string
exceptions, e.g. the exception

    psql timed out

 is thrown as

    psql timed out at /usr/share/perl5/vendor_perl/IPC/Run.pm line 2961.

To handle this, match exceptions with !~ rather than ne.

From: Craig Ringer <craig@2ndquadrant.com>
Reviewed-by: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>