eyre: Parts of Report are dropped as the wrong type during downcast

In affected versions, after a Report is constructed using wraperr or wraperrwith to attach a message of type D onto an error of type E, then using downcast to recover ownership of either the value of type D or the value of type E, one of two things can go wrong: - If downcasting to E, there remai...

Parts of Report are dropped as the wrong type during downcast

In affected versions, after a Report is constructed using wraperr or wraperrwith to attach a message of type D onto an error of type E, then using downcast to recover ownership of either the value of type D or the value of type E, one of two things can go wrong: - If downcasting to E, there remai...