[mc-update] NullPointerException when Alt-clicking a shulker box with Better Tooltips enabled #6706

Steps to reproduce

1. Launch Minecraft 26.3 with Meteor Client 26.3 (mc-update branch).
2. Enable the Better Tooltips module.
3. Join a multiplayer server.
4. Open a container containing a shulker box.
5. Hold Alt and click the shulker box to inspect its contents.
6. Minecraft crashes with a NullPointerException while rendering the tooltip.

NOTE: i did not modify the code in any way

Link to crash report/log (upload to https://mclo.gs and paste resulting link here)

https://mclo.gs/y63Zcrq

Meteor Version

26.3-local (mc-update branch)

Minecraft Version

26.3

Operating System

Windows

Before submitting a crash report

• This crash wasn't already reported (I have searched crash reports on GitHub).

• This is a valid crash (I am able to reproduce this on the latest dev build).