It did not crash if I got two sprint ones, the first one was still active though.
Hmm... That's strange. I'm not able to reproduce it. I tested various overlapping combinations (even 3 in a row) but it did not crash for me.
Can you tell what powerups at what spot (rough direction) caused the crash? Is it reproducable on your machine?
It's totally reproducible. I first go straight down to get the sprint powerup. With it I go up and then left to get this red one:
As soon as I touch it, the game crashes. I also get "Memory protection violation" error in the console, if that helps.
This seems to be a bug in the linux version. I never tested this one. I will try to debug it on linux in the next days.