To reproduce:
1) Kill someone (easier with a bow)
2) Quickly switch to a sword which has a name before the arrow hits.
3) If the arrow kills them, the name of the sword (item in hand) is shown.
Linked issues
relates to 1
Comments 3
Is this still an issue in the current Minecraft Snapshot 15w46a or later? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.
Relates to MC-3304