Earlier quoted context omitted.
No, rust leaks the path to the source code on the build machine. This path likely does not even exist on the execution machine, so there's absolutely no good reason for this leakage. It is very nonstandard. It is really, really annoying that the Rust team is not taking this problem seriously.
But is it only on debug builds? Or are release builds affected? Because if it’s the latter, that’s a big issue. But for the former, does it really matter?
At least in openSUSE, we always build with gcc -g and then later strip debug symbols into separate debuginfo files. This leaves a unique hash in the original file and that makes them vary if the build path changes.