Issue #13248 was fixed by https://go-review.googlesource.com/#/c/16930/.
This is the corresponding test case (original offending program).

Change-Id: I7c99783db74a5422704409cea7e5073094beadd3
Reviewed-on: https://go-review.googlesource.com/16973Reviewed-by: Chris Manghane <cmang@golang.org>