diff --git a/src/cmd/compile/internal/gc/align.go b/src/cmd/compile/internal/gc/align.go
index 5af403afa3..4bc454df22 100644
--- a/src/cmd/compile/internal/gc/align.go
+++ b/src/cmd/compile/internal/gc/align.go
@@ -199,7 +199,7 @@ func findTypeLoop(t *types.Type, path *[]*types.Type) bool {
 		}
 
 		*path = append(*path, t)
-		if findTypeLoop(asNode(t.Nod).Name.Param.Ntype.Type, path) {
+		if p := asNode(t.Nod).Name.Param; p != nil && findTypeLoop(p.Ntype.Type, path) {
 			return true
 		}
 		*path = (*path)[:len(*path)-1]
diff --git a/test/fixedbugs/issue42075.go b/test/fixedbugs/issue42075.go
new file mode 100644
index 0000000000..af85fb281d
--- /dev/null
+++ b/test/fixedbugs/issue42075.go
@@ -0,0 +1,16 @@
+// errorcheck
+
+// Copyright 2020 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
+
+import "unsafe"
+
+type T struct { // ERROR "recursive type"
+	x int
+	p unsafe.Pointer
+
+	f T
+}