lupa+coroutines segfaults in IPython

[kmike]

I'm using lupa 1.0, ipython 2.3 (both installed using pip) and lua 5.2.3 (installed using homebrew). The issue is quite strange: lupa segfaults in IPython but not in python.

Python:

>>> import lupa; lua = lupa.LuaRuntime()
>>> f = lua.eval("function(N) coroutine.yield(N) end")
>>> list(f.coroutine(1))
[1]
>>> f.coroutine(1)
<Lua thread at 0x7ff198f00b30>

IPython:

In [1]: import lupa; lua = lupa.LuaRuntime()
In [2]: f = lua.eval("function(N) coroutine.yield(N) end")
In [3]: list(f.coroutine(1))  # f.coroutine always seems to work fine when wrapped in list()
Out[3]: [1]
In [4]: f.coroutine(1)
Segmentation fault: 11

It is likely a manifistation of a problem unrelated to python vs ipython, it could segfault in IPython e.g. because memory layout of python and ipython processes are different. I've had a similar issue in one of my wrappers once (works in python, doesn't work in ipython); the cause was improper handling of null-terminated strings. But I'm sure you know all this stuff way better :)

[kmike]

With lua 5.1.5 (installed using homebrew) this also fails the same way both for lupa==1.0 and lupa==0.21.

[kmike]

Commands like bool(f.coroutine(1)) or repr(f.coroutine(1)) or gen = f.coroutine(1) don't segfaut for me, while just f.coroutine(1) or gen segfaults always - tried it on 2 different machines.

[kmike]

It fails the same way on Debian - in python example works, in ipython it segfaults.

[scoder]

Thanks for the report, I can reproduce this. Working on a fix.

[scoder]

Fixed:
4c3a9e1
Thanks!

[kmike]

Thanks for a quick fix!