**Bug introduced in 11.3**

----

Occasionally, I see a kernel crash with `GridGraph[{6,6,6}]`.  It is not easy to trigger. Sometimes it may require as many as 30 evaluations before it happens, and doing those evaluations in a `Do` loop doesn't trigger it. It is necessary to evaluate separate inputs manually. At other times, I cannot evaluate `GridGraph[{6,6,6}]` even once in a new session as it causes a crash every time.

Here's a screenshot (command line) of how it crashed after 20 evaluations (silent exit):

[![enter image description here][1]][1]

So far I could reproduce this with M11.3.0 on macOS 10.13.4. With M11.2.0 I could not.  I would like to know if others can see the crash too, or if it is related to some settings specific to my machine.

----

**Update:** Wolfram Support responded and confirmed the problem within hours after reporting it.

If the problem is significantly inconveniencing you, you can use `IGMakeLattice` from [IGraph/M][2] as a workaround. `IGMakeLattice` was included for other reasons (features not found in `GridGraph`), but it also makes a good workaround for this issue.

Specifically for the 2D and 3D case you may also use

    gridGraph[dims_List, opt : OptionsPattern[]] := IndexGraph@NearestNeighborGraph[Tuples[Range /@ dims], opt]

----

**Update 2:**

It seems that `HypercubeGraph` has a similar crash. My guess is that this is because it might be implemented as `GridGraph[ConstantArray[2,n]]`. Reported as CASE:4064377.

  [1]: https://i.stack.imgur.com/obw6b.png
  [2]: http://szhorvat.net/mathematica/IGraphM