You are still alive if your max health is 0

The Bug

When your max health is set to 0, you don't die directly. This is caused by MC-16345.
Additionally, when you take damage, you die twice. This is MC-19690.

How to Reproduce

1. /attribute @s minecraft:generic.max_health base set 0
   → You are still alive, with one heart
2. Take damage and die
3. Click respawn
   → You are resurrected at the same location as you died, now with half a heart (MC-19690)
4. Die again
   → You now respawn properly

Observed Behavior

Players remain alive when their "minecraft:generic.max_health" attribute is set to "0".

Expected Behavior

Players would die and not remain alive when their "minecraft:generic.max_health" attribute is set to "0".