cmd/compile: deal with blank nodes with typeparam type during stenciling
Deal correctly with a blank local variable with type param type. This is
a special case, because a blank local variable is not in the fn.Dcl
list. In this case, we must explicitly create a new blank node with the
correct substituted type, so we have correct types if the blank local
variable has an initializing assignment.
Fixes #48602
Change-Id: I903ea44b29934e180404e32800773b7309bf297b
Reviewed-on: https://go-review.googlesource.com/c/go/+/352117
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Dan Scales <danscales@google.com>