+>>>>> Yes, this suggests that CGI.pm's `upload` function is not working,
+>>>>> but that it *is* returning a filehandle pointing at the attachment
+>>>>> using the old method. Hmm, so I'll bet you have a CGI.pm version
+>>>>> older than 2.47. Can you find your system's CGI.pm and grep for
+>>>>> "VERSION" in it to determine the version? I checked debian stable.
+>>>>> and its perl 5.8.8 has version 3.15, so is not affected, I think.
+
+>>>>>> I have CGI.pm 3.15 too:
+
+>>>>>> $ grep VERSION= /usr/share/perl/5.8.8/CGI.pm
+>>>>>> $CGI::VERSION='3.15';
+
+>>>>> I've just checked in a fix that should work, can you test it?
+>>>>> [diff](http://git.ikiwiki.info/?p=ikiwiki;a=commitdiff;h=71f10579c00a8ddc20ada1a1efd33aac25a3da7e) --[[Joey]]
+
+>>>>>> I've patched `attachment.pm` module, but the bug still occurs.
+>>>>>> However I can see a little progress. I changed invoking `error()`
+>>>>>> subroutine like you showed me before and now Ikiwiki prints
+
+>>>>>> failed to get filehandle:test.txt ; file:sandbox/test.txt ; is ref:
+
+>>>>>> --[[Paweł|ptecza]]
+
+>>>>>>> Well then, your CGI.pm is somehow not behaving as its documentation
+>>>>>>> describes, in two ways:
+>>>>>>> 1. `upload()` is not returning a reference to the filehandle
+>>>>>>> 2. The filename returned by `param("attachment")` is not also
+>>>>>>> a file handle.
+>>>>>>> That seems very broken. I can try to work around it some more
+>>>>>>> though. I've checked in a second try at dealing with things, can
+>>>>>>> you try it? --[[Joey]]
+
+>>>>>>>> Do you mean that [diff](http://git.ikiwiki.info/?p=ikiwiki;a=commitdiff;h=66f35e30dcea03c631a293e2341771277543b4ae)?
+>>>>>>>> If so, then it causes "Internal Server Error" for me:
+
+>>>>>>>> Can't use string ("test.txt") as a symbol ref while "strict refs" in use at /usr/share/perl5/IkiWiki/Plugin/attachment.pm line 144.
+
+>>>>>>>> I can rebuild Debian stable source package with CGI for Perl. Maybe it will help me? What do you think? --[[Paweł|ptecza]]
+
+>>>>>>>>> Silly thinko on my part, fixed that in git.. --[[Joey]]
+
+>>>>>>>>>> Thanks for the fix, Joey! Now CGI doesn't fails, but still no success with attaching file:
+
+>>>>>>>>>> failed to open : No such file or directory
+
+>>>>>>>>>> Do you have any another idea how to resolve that problem? I can try with rebuilding
+>>>>>>>>>> package `perl-modules` if it's necessary in that situation. --[[Paweł|ptecza]]
+
+>>>>>>>>>>> If CGI.pm is not creating a temp file, not providing a
+>>>>>>>>>>> filehandle by either of its documented methods, then it's just
+>>>>>>>>>>> broken; ikiwiki can't deal with that level of brokennecess.
+>>>>>>>>>>> I need to find out if this affects stable in general, or just
+>>>>>>>>>>> you/ubuntu. --[[Joey]]
+
+>>>>>>>>>>>> Same thing on FreeBSD using CGI.pm 3.15. Looks like $self->{'.tmpfiles'} in CGI.pm
+>>>>>>>>>>>> is not populated with the information about the uploaded file, causing tmpFileName()
+>>>>>>>>>>>> to return '' (unloadInfo(), which uses the same lookup method fails in the same manner),
+>>>>>>>>>>>> but I have yet to find out why this happens. --[[HenrikBrixAndersen]]
+