Ouch that’s really unlucky.
Mine was a dinghy mast section while replacing a plastic sleeve. I had to drill three holes through the sleeve to match the existing holes in the mast.
For some reason I did it with the sleeve in place but all carefully measured or so I thought. Two holes went straight through perfectly aligned the third was about 3mm off centre and I ended up with a figure 8 shaped hole that wouldn’t hold a rivet and being at the highest stress point on the tube it would have been a very quick and jagged edged failure even if it had.
Just glad it was the alloy version and not the 3x the price carbon one.