// run

// Copyright 2014 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

func shouldPanic(f func()) {
        defer func() {
                if recover() == nil {
                        panic("not panicking")
                }
        }()
        f()
}

func f() {
        length := int(^uint(0) >> 1)

import "reflect"

type T interface {}

var x bool

func main() {
        reflect.TypeOf(nil)
        reflect.TypeOf(T(nil)) // used to miscompile
        shouldPanic()
}

func f() byte {
	return []byte(nil)[0] // used to miscompile
}

func shouldPanic() {
	defer func() {
		if recover() == nil {
			panic("not panicking")
		}
	}()
	f()

		// make sure a traceback happens with jmpdefer on the stack
		runtime.GC()
	}()
	var x Closer
	defer x.Close()
}

func shouldPanic(f func()) {
	defer func() {
		if recover() == nil {
			panic("did not panic")
		}
	}()
	f()
}

func main() {
	shouldPanic(nilInterfaceDeferCall)

import (
	"strings"
)

type T struct{}

const maxInt = int(^uint(0) >> 1)

func main() {
	s := make([]T, maxInt)
	shouldPanic("len out of range", func() { s = append(s, T{}) })
	var oneElem = make([]T, 1)
	shouldPanic("len out of range", func() { s = append(s, oneElem...) })
}

func shouldPanic(str string, f func()) {
	defer func() {
		err := recover()
		if err == nil {
			panic("did not panic")
		}

import (
	"strings"
	"unsafe"
)

func main() {
	shouldPanic("runtime error: index out of range", func() { f(0) })
	shouldPanic("runtime error: index out of range", func() { g(0) })
}

func f[T byte](t T) {
	const str = "a"
	_ = str[unsafe.Sizeof(t)]
}

func g[T byte](t T) {
	const str = "a"
	_ = str[unsafe.Sizeof(t)+0]
}

func shouldPanic(str string, f func()) {
	defer func() {
		err := recover()

package main

type I interface {
	Foo()
}

func main() {
	shouldPanic(p1)
}

func p1() {
	var s *S
	var i I
	var e interface{}
	e = s
	i = e.(I)
	_ = i
}

type S struct{}

func (s *S) _() {}

func shouldPanic(f func()) {
	defer func() {
		if recover() == nil {
			panic("function should panic")
		}
	}()
	f()

}

func main() {
	var i interface{} = int(3)
	var j I = myint(3)
	var x interface{} = float64(3)
	var y I = myfloat(3)

	println(f[int](i))
	shouldpanic(func() { f[int](x) })
	println(f2[int](i))
	println(f2[int](x))

	println(g[myint](j))
	shouldpanic(func() { g[myint](y) })
	println(g2[myint](j))
	println(g2[myint](y))

	println(h[int](struct{ a, b int }{3, 5}).a)

	println(k[int](mybar(3)).bar())

	var x Closer
	defer x.Close()
	// if it panics when evaluating x.Close, it should not reach here
	fail = true
}

func shouldPanic(f func()) {
	defer func() {
		if recover() == nil {
			panic("did not panic")
		}
	}()
	f()
}

func main() {
	shouldPanic(nilInterfaceDeferCall)
	if fail {
		panic("fail")
	}

	if x == nil {
		return T{2, 3};
	}

	t := x.(T);
	println(t.a, t.b);
	return x;
}

func main() {
	inner_T := f(nil);
	f(inner_T);

	shouldPanic(p1)
}

func p1() {
	outer_T := T{5, 7};
	f(outer_T);
}

func shouldPanic(f func()) {
	defer func() {
		if recover() == nil {
			panic("function should panic")
		}
	}()
	f()
}

/*
This prints:

2 3
5 7

		m map[int]int
		s struct{ x []int }
		f func()
	)
	noCmp(m)
	noCmp(s)
	noCmp(f)
}

func cmp(x interface{}) bool {
	return x == x
}

func noCmp(x interface{}) {
	shouldPanic(func() { cmp(x) })
}

func shouldPanic(f func()) {
	defer func() {
		if recover() == nil {
			panic("function should panic")
		}
	}()
	f()