[Bug 26436] Re: gtkmozembed crashs with python

[Sjoerd Hemminga]

I have been hunting this bug yesterday. It annoyed me I haven't been
able to use Newton Desktop Wiki since I started using Dapper.

The Python script above reproduced the problem for me and I used this to
test my solutions. Setting LD_LIBRARY_PATH to /usr/lib/firefox as is
mentioned by some above and in other places did work.

gtkmozembed.so provided by python-gnome2-extras already has an RPATH set
to /usr/lib/firefox, so it does not help this library. But
/usr/lib/firefox/libgtkembedmoz.so has no such RPATH set.

My theory is that the crash is due to some dynamic loading of libraries
by the component. Python loads gtkmozembed.so, which loads
libgtkembedmoz.so which (I think) tries to load some additional libs
that reside in /usr/lib/firefox. It cannot find these, because they are
not in the linker's search path. Due to some missing or broken error
handling, this results in a crash instead of a friendly error message.
This is my theory.

I tested this by compiling Firefox (and therefore libgtkembedmoz.so)
with RPATH set. This resulted in a working test  case. Good. The
attached patch fixes the Firefox package.

In Debian Policy RPATH is frowned upon. I don't know if this is the same
in Ubuntu. Seeing that gnome-python-extras uses RPATH, I think not. But
it can be a one off error. In that case,  the same problem can also be
solved  by creating a file /etc/ld.so.conf.d/firefox.conf with
/usr/lib/firefox as contents. (Run ldconfig after that.)

A good work-around while this isn't fixed is adding /usr/lib/firefox to
/etc/ld.so.conf and running ldconfig.

It is interesting to note that xulrunner puts libgtkembedmoz.so and
friends in /usr/lib, thereby bypassing this whole issue.

I hope this bug can be fixed before Feisty, since I would really, really
like to be able to use Newton out of the box again.

I think Elliott's bug is a different one.

** Attachment added: "Firefox patch to set RPATH to /usr/lib/firefox"
   http://librarian.launchpad.net/6609795/ff-rpath.patch

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gtkmozembed crashs with python
https://launchpad.net/bugs/26436