New test containing code that caused a gccgo compiler failure.

Updates #34503.

Change-Id: Id895a1e1249062b7fb147e54bcaa657e774ed0d9
Reviewed-on: https://go-review.googlesource.com/c/go/+/197217
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>