The ZeldaClassic player will crash when the player activates a tile warp if Combos Carry Over is checked in the Tile Warp dialogue. Stairs, Cave, and Direct warp-type combos result in crashes, though I haven't tested all available warping combos. The warps function normally when Combos Carry Over is turned off.
This quest demonstrates the problem on my computer (Windows 7 x64). Stepping on the switch reveals a Stairs-type warp. Activating it results in a crash, as does walking into the Cave and stepping in front of the sign (a Direct warp).