when attacker dies, what happens to the trample damage?

[SHAY]

what happens to the damage trample when attacker dies

[Arix]

Gonna need some more information.

[SHAY]

I attack with 4/1 trample and get blocked with a 1/1 for example

[Arix]

With the exception of first/double strike, combat damage is dealt simultaneously. So what happens is that the 1/1 assigns 1 to your 4/1, and your 4/1 assigns (at least) 1 to the 1/1 and any remainder to the defending player. Then all that damage is dealt at the same time - the 4/1 takes 1 damage, the 1/1 takes 1, and the defending player takes 3 (most likely). SBA's destroy both creatures.

[SHAY]

whats sba

[Arix]

State-based actions. They're basically the game's janitors, they make sure everything's in working order. They destroy creatures with lethal damage, kill players with 0 life, send Auras that aren't attached to anything to the graveyard, and a whole bunch of other stuff.