Initial commit: Go 1.23 release state

test/fixedbugs/issue28079c.go

@@ -0,0 +1,15 @@
+// errorcheck
+
+// Copyright 2018 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.
+
+// Non-Go-constant but constant values aren't ok for shifts.
+
+package p
+
+import "unsafe"
+
+func f() {
+	_ = complex(1<<uintptr(unsafe.Pointer(nil)), 0) // ERROR "invalid operation: shifted operand 1 \(type float64\) must be integer|non-integer type for left operand of shift"
+}