AwesomeWM + Gvim resize crashes (segfault)

Hi all,

A few days ago I started using Awesome as my window manager (running inside XFCE on xubuntu 15.10). Both Awesome and Vim are the default versions from the repository (v3.5.6 and 7.4.712).
When Gvim gets resized, either because I resize the master-pane of awesome, or simply by switching Awesome layout, Gvim will frequently hang and/or crash.

From what I could find it seems to be a segfault, but I have no clue what is causing this. In the past I have been using Gvim without any problems with xfwm4 (default xfce window manager). I also tried xmonad for a week where I didn't see these crashes when similarly resizing the xmonad master-pane or switching layouts.
I have a feeling that it might be triggered by one of the plugins I use. When I use Gvim without any vimrc it didn't seem to happen at first sight.

This is what I saw in the Ubuntu crash-submit tool:
vim.gnome crashed with sigsegv in get_syntax_atttr()

When starting gvim with `strace gvim -V9log.txt file.tex > stdout.txt 2> stderr.txt` I got the following in stdout.txt:
RenderBadPicture (invalid Picture parameter)
Vim: Got X error
Vim: Finished.

Any help on this is much appreciated.
Kind regards,
Jeroen

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