Better code check before compile?

[CuriousOne]

it is simple. Just count number of Subroutines and RETURNs and make sure they match, that's all, and already done 30 years ago.

Regarding what happened - it was huge (about 30 meters) Christmas tree 8 channel light controller. The code enables lights at max power for 0.1 second, to give "blink" effect. It worked for 2 years without any issues, until now, when I added some new programs, and forgot to add RETURN, so lights remain at high power for about 10 minutes, instead of 0.5second. It ended up with 9 pieces of solid state relays fried, until thermal switch cut off the power