Compilers generally don’t have bugs in parsing standard language syntax. The bugs that tend to be found in compilers are generally quite obscure.
It’s almost certainly something that got mis-matched or configured wrong – computers don’t have random number generators on the inside to figure out what “build” means – but if you don’t have the files still, then it’s impossible to debug and figure out what it is.
Good news: You started over and don’t have this problem now.
Bad news: If the problem happens again, you don’t yet know what causes it, and thus it will take longer to debug it at that time.