test: add regress test for #53619

Works with cmd/compile, but fails with gccgo currently.

Updates #53619.

Change-Id: I787faa9584cc33bd851c9cc8f146c91f4eb36fc9
Reviewed-on: https://go-review.googlesource.com/c/go/+/415238
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
diff --git a/test/fixedbugs/issue53619.go b/test/fixedbugs/issue53619.go
new file mode 100644
index 0000000..2b6d047
--- /dev/null
+++ b/test/fixedbugs/issue53619.go
@@ -0,0 +1,21 @@
+// run
+
+// Copyright 2022 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
+
+var c = b
+var d = a
+
+var a, b any = any(nil).(bool)
+
+func main() {
+	if c != false {
+		panic(c)
+	}
+	if d != false {
+		panic(d)
+	}
+}