Sorry for the Necro on this one.
I came across this bug this evening, I am not sure what has caused this issue as I have not seen it before... some redstone energy conduits looks like they are invisble.
Trying to sneak + right-click with a wrench crashes the game instantly.
A lot of the redstone conduits are in this state, it seem to repeat every two or three blocks... despite these seeming breaks in the conduits power is still provided.
Problem only seemed to present itself after I started work on my AE system in line with following DW20 on his video series. I suspect perhaps that it was introduced somehow after I ran a length of ME Cable beside the Redstone energy conduit?
Have checked other areas of my base and those Redstone energy conduits do not seem to be affected, even the long cable runs out to the automated farms.
**Update**
I upgraded from 1.0.18 to 1.0.19 and restarted the server, problem went away as mysteriously as it appeared.