Thread:Extension talk:Scribunto/Script error: Lua error: Internal error: The interpreter has terminated with signal "11".

Trying to add http://en.wikipedia.org/w/index.php?title=Module:Navbox to my wiki.

When I edit Module:Navbox and try to save the code, it returns the error: Script error: Lua error: Internal error: The interpreter has terminated with signal "11".

Nothing is written to the error file either; only a blank file is created.

Edit:

Simple code such as:

results in the same error.