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-rw-r--r--src/cmd/compile/internal/noder/stencil.go3
-rw-r--r--test/typeparam/issue48604.go25
2 files changed, 28 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/noder/stencil.go b/src/cmd/compile/internal/noder/stencil.go
index d5fb9f338c..bc142e6985 100644
--- a/src/cmd/compile/internal/noder/stencil.go
+++ b/src/cmd/compile/internal/noder/stencil.go
@@ -1093,6 +1093,9 @@ func (subst *subster) node(n ir.Node) ir.Node {
case ir.OCALL, ir.OCALLFUNC, ir.OCALLMETH, ir.OCALLINTER:
transformCall(call)
+ case ir.OCONVNOP:
+ transformCall(call)
+
case ir.OFUNCINST:
// A call with an OFUNCINST will get transformed
// in stencil() once we have created & attached the
diff --git a/test/typeparam/issue48604.go b/test/typeparam/issue48604.go
new file mode 100644
index 0000000000..1babd3f864
--- /dev/null
+++ b/test/typeparam/issue48604.go
@@ -0,0 +1,25 @@
+// build -gcflags=-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 main
+
+type Foo[T any] interface {
+ CreateBar() Bar[T]
+}
+
+type Bar[T any] func() Bar[T]
+
+func (f Bar[T]) CreateBar() Bar[T] {
+ return f
+}
+
+func abc[R any]() {
+ var _ Foo[R] = Bar[R](nil)()
+}
+
+func main() {
+ abc[int]()
+} \ No newline at end of file