-### msgfmt
-
-`isvalidpo()` runs this external program.
-
-* I could not manage to make it behave badly using zzuf, it exits
- cleanly when too many errors are detected.
-* I could not find any past security holes.
-
-### Fuzzing input
-
-Test conditions:
-
-- a 21M file containing 100 concatenated copies of all the files in my
- `/usr/share/common-licenses/`; I had no existing PO file or
- translated versions at hand, which renders these tests
- quite incomplete.
-- po4a was the Debian 0.34-2 package; the same tests were also run
- after replacing the `Text` module with the CVS one (the core was not
- changed in CVS since 0.34-2 was released), without any significant
- difference in the results.
-- Perl 5.10.0-16
-
-#### po4a-gettextize
-
-`po4a-gettextize` uses more or less the same po4a features as our
-`refreshpot` function.
-
-Without specifying an input charset, zzuf'ed `po4a-gettextize` quickly
-errors out, complaining it was not able to detect the input charset;
-it leaves no incomplete file on disk.
-
-So I had to pretend the input was in UTF-8, as does the po plugin.
-
-Two ways of crashing were revealed by this command-line:
-
- zzuf -vc -s 0:100 -r 0.1:0.5 \
- po4a-gettextize -f text -o markdown -M utf-8 -L utf-8 \
- -m LICENSES >/dev/null
-
-They are:
-
- Malformed UTF-8 character (UTF-16 surrogate 0xdcc9) in substitution iterator at /usr/share/perl5/Locale/Po4a/Po.pm line 1443.
- Malformed UTF-8 character (fatal) at /usr/share/perl5/Locale/Po4a/Po.pm line 1443.
-
-and
-
- Malformed UTF-8 character (UTF-16 surrogate 0xdcec) in substitution (s///) at /usr/share/perl5/Locale/Po4a/Po.pm line 1443.
- Malformed UTF-8 character (fatal) at /usr/share/perl5/Locale/Po4a/Po.pm line 1443.
-
-Perl seems to exit cleanly, and an incomplete PO file is written on
-disk. I not sure whether if this is a bug in Perl or in `Po.pm`.
-
-> It's fairly standard perl behavior when fed malformed utf-8. As long as it doesn't
-> crash ikiwiki, it's probably acceptable. Ikiwiki can do some similar things itself when fed malformed utf-8 (doesn't crash tho) --[[Joey]]
-
-#### po4a-translate
-
-`po4a-translate` uses more or less the same po4a features as our
-`filter` function.
-
-Without specifying an input charset, same behaviour as
-`po4a-gettextize`, so let's specify UTF-8 as input charset as of now.
-
- zzuf -cv \
- po4a-translate -d -f text -o markdown -M utf-8 -L utf-8 \
- -k 0 -m LICENSES -p LICENSES.fr.po -l test.fr
-
-... prints tons of occurences of the following error, but a complete
-translated document is written (obviously with some weird chars
-inside):
-
- Use of uninitialized value in string ne at /usr/share/perl5/Locale/Po4a/TransTractor.pm line 854.
- Use of uninitialized value in string ne at /usr/share/perl5/Locale/Po4a/TransTractor.pm line 840.
- Use of uninitialized value in pattern match (m//) at /usr/share/perl5/Locale/Po4a/Po.pm line 1002.
-
-While:
-
- zzuf -cv -s 0:10 -r 0.001:0.3 \
- po4a-translate -d -f text -o markdown -M utf-8 -L utf-8 \
- -k 0 -m LICENSES -p LICENSES.fr.po -l test.fr
-
-... seems to lose the fight, at the `readpo(LICENSES.fr.po)` step,
-against some kind of infinite loop, deadlock, or any similar beast.
-
-The root of this bug lies in `Text::WrapI18N`, see above for
-possible solutions.
-
-gettext/po4a rough corners
---------------------------
-
-- fix infinite loop when synchronizing two ikiwiki (when checkouts
- live in different directories): say bla.fr.po has been updated in
- repo2; pulling repo2 from repo1 seems to trigger a PO update, that
- changes bla.fr.po in repo1; then pushing repo1 to repo2 triggers
- a PO update, that changes bla.fr.po in repo2; etc.; quickly fixed in
- `629968fc89bced6727981c0a1138072631751fee`, by disabling references
- in Pot files. Using `Locale::Po4a::write_if_needed` might be
- a cleaner solution. (warning: this function runs the external
- `diff` program, have to check security)
-- new translations created in the web interface must get proper
- charset/encoding gettext metadata, else the next automatic PO update
- removes any non-ascii chars; possible solution: put such metadata
- into the Pot file, and let it propagate; should be fixed in
- `773de05a7a1ee68d2bed173367cf5e716884945a`, time will tell.
-
-Better links
-------------
-
-### Page title in links
-
-Using the fix to
-[[bugs/pagetitle_function_does_not_respect_meta_titles]] from
-[[intrigeri]]'s `meta` branch, the generated links' text is based on
-the page titles set with the [[meta|plugins/meta]] plugin. This has to
-be merged into ikiwiki upstream, though.
-
-Robustness tests
-----------------
-
-### Enabling/disabling the plugin
-
-- enabling the plugin with `po_translatable_pages` set
-- enabling the plugin without `po_translatable_pages` set: **OK**
-- disabling the plugin: **OK**
-
-### Changing the plugin config
-
-- adding existing pages to `po_translatable_pages`: **OK**
-- removing existing pages from `po_translatable_pages`: **OK**
-- adding a language to `po_slave_languages`: **OK**
-- removing a language from `po_slave_languages`: **OK**
-- changing `po_master_language`: **OK**
-- replacing `po_master_language` with a language previously part of
- `po_slave_languages`: needs two rebuilds, but **OK** (this is quite
- a perverse test actually)
-
-### Creating/deleting/renaming pages
-
-All cases of master/slave page creation/deletion/rename, both via RCS
-and via CGI, have been tested.
-
-### Misc