See the added comment for the reasoning behind the workaround.

Fixes #26868.

Change-Id: Idede020ec88a49595dc233d9a1346b12691186f4
Reviewed-on: https://go-review.googlesource.com/128815
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>