The game crashes when holding your mouse cursor over players that are online on realms

The Bug:

The game crashes when holding your mouse cursor over players that are online on realms.

Stack Trace:

Description: Rendering screen

java.lang.IllegalStateException: Checkpoint stack is not empty
	at fzt.a(SourceFile:34)
	at fuc.e(SourceFile:113)
	at fuc.a(SourceFile:588)
	at fuc.a(SourceFile:553)
	at fuc.a(SourceFile:544)
	at fmd$l.a(SourceFile:1184)
	at fmd$l.a(SourceFile:1164)
	at fuj.a(SourceFile:330)
	at fuj.c(SourceFile:311)
	at fuj.b(SourceFile:180)
	at fun.a(SourceFile:66)
	at gbn.a(SourceFile:125)
	at fmd.a(SourceFile:606)
	at gbn.c(SourceFile:115)
	at gtf.a(SourceFile:543)
	at fri.c(SourceFile:1352)
	at fri.f(SourceFile:937)
	at net.minecraft.client.main.Main.main(SourceFile:265)

Steps to Reproduce:

1. Have a player join your realm.

2. Wait for their head to appear in the realm list.

3. Hold your mouse cursor over the head.

Observed Behavior:

The game crashes.

Expected Behavior:

The game would not crash.