F9 Crashes Vim

[GoogleCodeExporter]

What steps will reproduce the problem?
1. open a python file
2. ConqueTermVSplit python (or ipython or bpthon and maybe other programs too)
3. Visually select more than a handful of lines (say 15) and hit F9 

What is the expected output? What do you see instead?
lines execute in the Conque Term. VIm crashes

What version of the product are you using? On what operating system?
Vim 7.4, OSX

Please provide any additional information below.

Original issue reported on code.google.com by ntomas...@mindmixer.com on 15 Oct 2014 at 9:29