tree 26781befbffec556975a142564b82a16c3bb4ea0
parent 4e09f5a7a913efc0eb0cd0887138548b9b6fe013
author Damien Neil <dneil@google.com> 1549575909 -0800
committer Damien Neil <dneil@google.com> 1549641601 +0000

xerrors: check for nil pointers in As's target

As already checks for a nil or non-pointer target; check for nil pointers
as well. Produces a better error message and catches incorrect target
parameters even when the target doesn't match the error.

Change-Id: I06efb4b78f640b17076f002519d275b328b42557
Reviewed-on: https://go-review.googlesource.com/c/161657
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>