Like the title says.

Spawner is completely set up and worked fine pre-latest-update, I haven't been able to test it on a "loose" spawner yet, as I've managed to report this entire issue while waiting for my client to start again, will report back when I have.

EDIT: new, empty spawners don't cause this crash. A completely different already set up spawner however also crashed my client on right click. Other RFTools devices work fine. New crash log

Crash log: Here
Minecraft version: 1.10.2
Forge version: forge-1.10.2-12.18.3.2185-universal
RFTools version: rftools-1.1x-5.74.jar

I can also confirm this bug.

Right clicking the spawner causes:
Description: Rendering screen
java.lang.ArithmeticException: Rounding needed with the rounding mode being set to RoundingMode.UNNECESSARY
at mcjty.rftools.blocks.spawner.GuiSpawner.showSyringeInfo(GuiSpawner.java:130)

Crash log: http://pastebin.com/uGaXCWDS
Minecraft version: 1.10.2
Forge version: forge-1.10.2-12.18.3.2185-universal
RFTools version: rftools-1.1x-5.74.jar

Fixed in 5.75

I'm getting this bug now. Has it reappeared?
EDIT: I'll check my version of RFtools to check.

Update :P We don't support any version under 1.12 anymore, sorry.

I'm using Valhelsia 2 (02/10/20 release) from the twitch Launcher, so whatever is in there. It uses Minecraft 1.15.2 and RFTools for 1.15 above

Check the versions, you might have found a new bug, if it's crashing you then pastebin a crash log as well

Here's the pastebin if it helps! Good luck. https://pastebin.com/b8REJQPU
Open in Pastebin Manager: pastebinmanager://pasteview?key=b8REJQPU

Okay, looks to be a mod compatability issue, if you could open up an issue here https://github.com/McJtyMods/RFToolsUtility/issues with that crash log 👍 but before that, please try updatting RFToolsUtilities to 2.1.14 first