defined-or used

[eserte]

It seems that the code is using defined-or (//), which is not implemented in perl 5.8.x --- so either the perl minimum version needs to be set/increased, or the code rewritten:

Possible unintended interpolation of @cpan in string at lib/Mail/DMARC/Report/Store/SQL/Grammars/MySQL.pm line 92.
Possible unintended interpolation of @cpan in string at lib/Mail/DMARC/Report/Store/SQL/Grammars/MySQL.pm line 92.
Possible unintended interpolation of @marcbradshaw in string at lib/Mail/DMARC/Report/Store/SQL/Grammars/MySQL.pm line 92.
Bareword found where operator expected at lib/Mail/DMARC/Report/Store/SQL/Grammars/MySQL.pm line 325, near "This is free software; you can redistribute it and/or"
  (Might be a runaway multi-line // string starting on line 92)
Unable to load backend SQL: Global symbol "$table" requires explicit package name at lib/Mail/DMARC/Report/Store/SQL/Grammars/MySQL.pm line 23.
... (etc) ...
Global symbol "@marcbradshaw" requires explicit package name at lib/Mail/DMARC/Report/Store/SQL/Grammars/MySQL.pm line 92.
lib/Mail/DMARC/Report/Store/SQL/Grammars/MySQL.pm has too many errors.
Compilation failed in require at lib/Mail/DMARC/Report/Store/SQL.pm line 11.
BEGIN failed--compilation aborted at lib/Mail/DMARC/Report/Store/SQL.pm line 11.
Compilation failed in require at (eval 76) line 2.
BEGIN failed--compilation aborted at (eval 76) line 2.

 at lib/Mail/DMARC/Report.pm line 78.
# Tests were run but no plan was declared and done_testing() was not seen.
# Looks like your test exited with 255 just after 115.
t/04.PurePerl.t .............................. 
Dubious, test returned 255 (wstat 65280, 0xff00)
All 115 subtests passed 
... (etc) ...