cmd/compile: fix error when revcType is ptr in selectorExpr

Fixes #48056

Change-Id: I13ca4caadbabf02084f66ab28b4cf0c4a3705370
Reviewed-on: https://go-review.googlesource.com/c/go/+/346049
Reviewed-by: Dan Scales <danscales@google.com>
Trust: Dan Scales <danscales@google.com>
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

1 files changed, 27 insertions, 0 deletions

diff --git a/test/typeparam/issue48056.go b/test/typeparam/issue48056.go
new file mode 100644
index 0000000000..8d1c3eff64
--- /dev/null
+++ b/test/typeparam/issue48056.go
@@ -0,0 +1,27 @@
+// compile -G=3
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package p
+
+type B[T any] interface {
+	Work()
+}
+type BImpl[T any] struct{}
+
+func (b *BImpl[T]) Work() {
+}
+
+type A[T any] struct {
+	B[T]
+}
+
+func f[T any]() {
+	s := &A[T]{
+		&BImpl[T]{},
+	}
+	// golang.org/issue/48056
+	s.Work()
+}