Originally Posted by
Looigi
I know that rims are under compression, but I've certainly seen rims with cracks that develop and propagate, so it's unlikely to cause a problem but conceivable that a crack could start to develop...something to keep an eye on.
Yes cracks do develop, but usually at the stressed areas at the spoke holes. While it's always possible that a crack might develop, it isn't likely.
If the OP does a decent improvised repair just to buy himself some time, I'm sure it last until something else kills of the rim.