I was trying to do something else when I found I can’t define a variable y1 when using the interpreter. I tried this:
root Int_t y1
And it gave me an entire crash in root6.02 and a gentle reminder on 6.13:
root  Int_t y1 ROOT_prompt_0:1:7: error: redefinition of 'y1' as different kind of symbol Int_t y1 ^ /usr/include/*/bits/mathcalls.h:251:13: note: previous definition is here __MATHCALL (y1,, (_Mdouble_));
It looks for me that this is a very standard way to define a variable (y1), so I don’t really know if there is something wrong in using it or perhaps it is bug (calling a global variable as y1 is not quite right in my point of view ).
Regarding a similar problem a couple of months ago I posted something about defining a variable as “rand” in which @eguiraud created a JIRA ticket to change the name of those variables in the tutorials. The bug has not been fixed and still causes on-line tutorials examples to fail here. Maybe I shouldn’t reefer to this because it is old documentation? Nevertheless, I made a pull request not being sure if this is a propper solution to the problem. Aside question: Does ROOT have a plan to use github issues system in the near future?