way to omit line numbers?

[ahl]

I find that the rustc output trybuild sticks into the .stderr files includes line numbers from the library I'm testing. These line numbers change which causes the tests to fail. Here's an example:

oxidecomputer/dropshot@55b9845#diff-c63021f72157cff462241d93ba6eb04cR37

I imagine this is a fairly common use case; is there a way to suppress line numbers or structure my tests in such a way that they aren't included in the output?