// A nil ReadWriter passed to nil Reader is OK,
			// but using ifaceE2I below will panic.
			// Avoid the panic by returning a nil dst (e.g., Reader) explicitly.
			return Value{dst, nil, flag(abi.Interface)}
		}
		x := valueInterface(v)
		if dst.NumMethod() == 0 {
			*(*any)(target) = x
		} else {
			ifaceE2I(dst, x, target)
		}
		return Value{dst, target, flagIndir | flag(abi.Interface)}
	}

//   - github.com/v2pro/plz
//
// Do not remove or change the type signature.
//
//go:linkname reflect_ifaceE2I reflect.ifaceE2I
func reflect_ifaceE2I(inter *interfacetype, e eface, dst *iface) {
	*dst = iface{assertE2I(inter, e._type), e.data}
}

//go:linkname reflectlite_ifaceE2I internal/reflectlite.ifaceE2I
func reflectlite_ifaceE2I(inter *interfacetype, e eface, dst *iface) {
	*dst = iface{assertE2I(inter, e._type), e.data}
}

			// but using ifaceE2I below will panic.
			// Avoid the panic by returning a nil dst (e.g., Reader) explicitly.
			return Value{dst, nil, flag(Interface)}
		}
		x := valueInterface(v, false)
		if target == nil {
			target = unsafe_New(dst)
		}
		if dst.NumMethod() == 0 {
			*(*any)(target) = x
		} else {
			ifaceE2I(dst, x, target)
		}

				}

				{
					// interface{} to interface{}
					var iface2 interface{}
					if err := modePair.dec.Unmarshal(cborFromIface, &iface2); err != nil {
						t.Fatalf("unexpected error from Unmarshal into %T: %v", &iface2, err)
					}
					if diff := cmp.Diff(iface, iface2); diff != "" {
						t.Errorf("unexpected difference on roundtrip from interface{} to interface{}:\n%s", diff)
					}

	var p *S = nil;
	var i I = p;  // this should be possible even though p is nil: we still know the type
	i.M();  // should be possible since we know the type, and don't ever use the receiver
}


/*
throw: ifaces2i: nil pointer
SIGSEGV: segmentation violation
Faulting address: 0x0
pc: 0x1b7d

0x1b7d?zi
	throw(30409, 0, 0, ...)
	throw(0x76c9, 0x0, 0x0, ...)
0x207f?zi
	sys·ifaces2i(31440, 0, 31480, ...)

		}
	}
}

const autotmpTypeSource = `
package main

type astruct struct {
	a, b int
}

func main() {
	var iface interface{} = map[string]astruct{}
	var iface2 interface{} = []astruct{}
	println(iface, iface2)
}
`

// TestGdbAutotmpTypes ensures that types of autotmp variables appear in .debug_info
// See bug #17830.
func TestGdbAutotmpTypes(t *testing.T) {
	checkGdbEnvironment(t)

	{"eq .V1 .V2", "true", true},
	{"eq .Ptr .Ptr", "true", true},
	{"eq .Ptr .NilPtr", "false", true},
	{"eq .NilPtr .NilPtr", "true", true},
	{"eq .Iface1 .Iface1", "true", true},
	{"eq .Iface1 .Iface2", "false", true},
	{"eq .Iface2 .Iface2", "true", true},
	{"eq .Map .Map", "true", true},        // Uncomparable types but nil is OK.
	{"eq .Map nil", "true", true},         // Uncomparable types but nil is OK.