CSC : warning CS8785: Source Generator Error - Can we get a stacktrace?

[thomhurst]

I have this error:

CSC : warning CS8785: Generator 'TestsGenerator' failed to generate source. It will not contribute to the output and compilation err
ors may occur as a result. Exception was of type 'NullReferenceException' with message 'Object reference not set to an instance of a
n object.'.

I have no idea where about that's happening. How am I supposed to narrow it down?

Is there a way to see a stacktrace with locations and line numbers?

Thanks

[thomhurst]

Update: I managed to find a stacktrace by adding this property
/p:ErrorLog=compiler-diagnostics.sarif

Any reason we don't show the stacktrace by default?