[donut]

Here's the deal. In Maine (just an example, I know your not there.), they did have safety inspections. Surface rust on a brake line =fail, cobbled patches=fail. (btw, that hole, was that the ONLY weak point?)

IIRC, brake fittings are supposed to be double flared. Compression fittings aren't rated anywhere near what your system can produce in a panic brake situation. Up there, we were required to replace the line at least back to the nearest factory fitting. Auto parts stores had the fittings and the lines, they were straight, but flared on both ends. They were also soft, so they could be bent by hand. Also various lengths ( I think 9" up to 4') Metric and standard.

All accidents weren't planned. Otherwise, they'd be on purposes

I'm not busting on you, but what happens next time? (there will be a next time.)
Parts to repair it correctly are relatively cheap. Not counting a flaring tool, less than a tank of gas.