[cling] Introspection crashes on std namespace when <iostream> is included

[SylvainCorlay]

Cf upstream issue https://github.com/vgvassilev/cling/issues/152 by @gouarin

[ruihangdu]

using jupyter notebook on Windows and got this when I was trying to print to std::cout Any thoughts?

[JohanMabille]

There is a limitation of cling which does not support yet printing to std::cout on Windows (you can however ask for the value of a variable by typing the name of the variable in a cell, without semicolon at the end).

On cling, an exception is raised, it does not crash the interpreter. We need to investigate why the behavior is different in xeus-cling.

[tbhaxor]

@JohanMabille i am getting this error on manjaro linux