On line 329, there is the following code:

if !exists('s:tlist_sid')
" Two or more versions of taglist plugin are installed. Don't
" load this version of the plugin.
finish
endif

It should be:

if !exists('s:tlist_sid')
" Two or more versions of taglist plugin are installed. Don't
" load this version of the plugin.
let &cpo = s:cpo_save
finish
endif