Crash in TParallelcoord tutorial

ROOT
1

Hello,
just for fun, I tried
.x $ROOTSYS/tutorials/tree/parallelcoord.C (in 5.17.02)
(It’s very nice!) In the Canvas Editor, when I go to the “Variables” tab and then push “Delete”, I would expect the axis with “x” to go quietly away (since that’s the selected variable by default). What happens is very different: the x and y axes move together and distort the plot. When I then try to drag and move the x axis to a position right of the y axis, ROOT crashes like this:
root [0] .x $ROOTSYS/tutorials/tree/parallelcoord.C
root [1] *** glibc detected *** free(): invalid next size (fast): 0x0000000000fa2f70 ***

This is very reproducible, at least on my machine.
Is there something wrong with the tutorial, or am I using it in the wrong way?
Thanks,

Thomas

2

Hi Thomas,

I can reproduce the crash. Thank you for reporting this case. We will keep you informed about the fix.

Cheers, Ilka

3

Hi Ilka

Very good, thanks for the effort. Finally, I understand what they mean by “crash tutorial” :laughing:

Thomas

4

Hi Thomas,

The parallel coordinates interface was developed this summer and I have not had time to see/test the editor related code, but it is already included in the ToDo list.

Best regards, Ilka

5

This problem is now fixed in the svn trunk. Thanks to have reported it.