NBGrader with cling kernel

Operating system

Linux Debian wheezy

nbgrader --version

nbgrader version 0.5.4

jupyterhub --version (if used with JupyterHub)

jupyter notebook --version

5.5.0

Expected behavior

I am using the C++ cling kernel with NbGrader and running into some issues.

1. assert(false) or another method causes 0 points and program continues.
2. cell execution if it throws uncaught exception, lets the kernel continue

Actual behavior

1. using the assert function in C/C++ does not cause test to fail assert(false) gets full credit I think assert in C++ cling has no effect in production mode. There should be another method provided
2. If the execution of a cell leads to uncaught exception, cling should not hang but continue.

Problem 2 is probably a problem with the kernel.

Steps to reproduce the behavior

Install a cling kernel and NbGrader . Also I use the following nbgrader_config.py : c = get_config() c.Exchange.course_id = “AlgoProj1” c.Exchange.root = “/mnt/nfs/[e-mail]/share” c.ExecutePreprocessor.kernel_name = “cling-cpp17” c.ClearSolutions.code_stub = { “R”: “# your code here\nraise NotImplementedError”, “python”: “# your code here\nraise NotImplementedError”, “javascript”: “// your code here, make sure it compiles or no grade for the whole notebook\n return 0;”, “C++”: “// your code here\n throw NULL;” }

[jhamrick]

Yes, makes sense to close I think, thanks for confirming @nthiery that it works with xeus-cling at least!

[nthiery]

I can confirm that nbgrader works very smoothly with xeus-cling. Maybe this issue can be closed? This is really a bug of the plain cling kernel.