Initial commit: Go 1.23 release state

test/fixedbugs/issue17588.go

@@ -0,0 +1,20 @@
+// errorcheck -d=panic
+
+// Copyright 2016 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.
+
+// Issue 17588: internal compiler error in typecheckclosure()
+// because in case of Func.Nname.Type == nil, Decldepth
+// is not initialized in typecheckfunc(). This test
+// produces that case.
+
+package p
+
+type F func(b T) // ERROR "T .*is not a type|expected type"
+
+func T(fn F) {
+	func() {
+		fn(nil) // If Decldepth is not initialized properly, typecheckclosure() Fatals here.
+	}()
+}