I'm doing something like:
[[!inline pagenames="foo bar baz"]]
over on the index page of a new branchable instance. If one of "foo", "bar", or "baz" doesn't exist, it appears, i see this error instead:
[[!inline Error: subroutine "mimetype" needs a filename as argument at /usr/share/perl5/IkiWiki/Plugin/inline.pm line 645]]
obviously, i can work around that by just Not Doing That, but a cleaner or more intelligible error message would help a normal user find the problem.