King's Quest I (SCI) hangs indefinitely after playing the fiddle in the leprechaun cave

[agustincordes]

This might be an original bug from Sierra. It's a game-breaking condition that can only be reproduced with the attached save file:

When you meet the leprechauns, you can either rely on the four-leaf clover to avoid them or play a fiddle to make them dance and get some extra points. However the game hangs when I play it. The leprechauns disappear, but Graham will keep playing the fiddle indefinitely.

Note the score doesn't go up and the music stops -- in the correct sequence, Graham plays a bit more after the leprechauns disappear before stopping.

While testing, I reloaded a previous save and acquired some missing points (exiting the dragon's cave before the eagle catches me). Then the sequence worked correctly, the key difference being 135 points instead of 133.

I've tested this on 2.1.2, 2.2.0git, iPad Pro, macOS Catalina and Windows 10. The bug can always be reproduced with the save. Tested this with KQ1SCI from the King's Quest Collection Series (1997).