The lit Smash Trap's harmless touch

Verified against the spelunky.ai port v0.1.12 on 28 October 2026.

A Smash Trap hits the player for 10 hearts on every step it touches him, throws him and makes him drop what he holds. On a dark level the Temple makes the lit kind instead, which glows and slides as the plain one does, but isn't a Smash Trap to the one check that hits the player, so its touch does nothing. It kills only by sliding on into him until he's crushed.

On a dark Temple level, the player jumps into the line of a lit Smash Trap. It slides at him, and its touch neither takes hearts nor throws him: it slides on into him, and crushes him ^[1].

On a dark level, scrEntityGen makes oSmashTrapLit where it would make oSmashTrap ^[2]. The lit kind has the plain one's code ^[3], but not the plain one as its parent: both are children of oMovingSolid, where the lit Arrow and Spear Traps are children of their plain kinds ^[4]. The player's step looks for a Smash Trap by name:

if (collision_rectangle(x-6, y-6, x+6, y+7, oSmashTrap, 0, 0))
{
    if (global.plife > 0 and isRealLevel()) global.miscDeaths[8] += 1;

    obj = instance_nearest(x, y, oSmashTrap);
    global.plife -= 10;
    if (obj.x+8 < x) xVel = -rand(4,6);
    else xVel = rand(4,6);
    yVel = -6;

A check for oSmashTrap finds its children, and the lit kind isn't one, so none of it runs: no 10 hearts, no throw, no dropping what he holds ^[5], and no count in the deaths table's SMASH TRAP row (miscDeaths[8]). The lit trap is still solid, so once it has slid into him until his middle is inside it, the crush check any solid sets off takes 99 hearts, counted as CRUSHED (miscDeaths[2]) ^[6].

Reach a dark Temple level with a Smash Trap, which one block in sixty gets once the monsters' rolls fail, and step into its line ^[7]. The replay, with seed 1, waits at level 13's exit until level 14 comes up dark, with six lit Smash Traps, and jumps the player into one's line. It slides at him, and his 4 hearts go all at once, on the step it crushes him, with the crush's yVel of -3; no step before has the hit's -6. The kill is counted as crushed, never as the smash trap ^[8]. A plain Smash Trap's touch, on a lit level, takes 10 hearts a step before it crushes him ^[9].

The spelunky.ai port reproduces it exactly: it's in docs/quirks.md's list of the 1.1 source's bugs ^[4], and the oracle's fingerprint of the replay pins the hearts, the player's yVel and the deaths table. No option turns it off.