Ambush Class Related Bugs

A collection of bugs I have found while testing out the Ambush class.

SpawnWave Crashes in Blue Womb & Greed Mode

The game crashes when calling Ambush:SpawnWave() inside of Blue Womb or while playing Greed Mode. The crash log goes as follows:

No enemy wave found for ambush (difficulty: 1)
Lua stack trace:
[C](-1): SpawnWave
lua(1): ?
Caught exception, writing minidump...

Normally, calling this function in stages where there are no ambush rooms (Home, Chest, and Dark Room) will just spawn four attack flies. It would make sense to have this behavior be present when calling the function in Blue Womb/Greed Mode

SpawnBossRushWave Broken

This function does not work unless an ambush has been triggered at least once while the game is running.

StartChallenge Softlock

Calling this function outside of an ambush room will start the music and close all doors, but no enemies will spawn. This can softlock the player.

Greed Mode Crashes

All of the functions outlined above crashes the game when used in Greed/Greedier mode.

Start by reproducing Ambush:SpawnWave, SpawnBossRushWave, and StartChallenge in Blue Womb, Greed Mode, and Greedier mode, comparing them with stages that have no ambush rooms. Done means these calls no longer crash or softlock, SpawnWave provides the expected fallback behavior, and SpawnBossRushWave works without a prior ambush.