CL 579935 disabled usage of Alias types in the compiler, and tracks
the problem with issue #66873. The test case in #65893 passes now
with the current tip. This CL adds a test case to ensure there is no
regression once Alias types are enabled for the compiler.
Updates #66873
Fixes #65893
Change-Id: I51b51bb13ca59549bc5925dd95f73da40465556d
Reviewed-on: https://go-review.googlesource.com/c/go/+/568455 Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> Reviewed-by: Robert Griesemer <gri@google.com>
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Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>