Goroutine stack exceeds 250000000-byte limit

[Runix]

Hi, this is a bug in fmt.Println or behavior described?

http://play.golang.org/p/JbFloYc1yK

package main

import "fmt"

func main() {

var a []interface{}

a = make([]interface{}, 0, 10)

a = append(a,

append(a, 2, 3, 4),

append(a, 5, 6, 7),

append(a, 8, 9, 10),

append(a, 11, 12, 13))

fmt.Println(a)

}

runtime: goroutine stack exceeds 250000000-byte limit
fatal error: stack overflow

runtime stack:
runtime.throw(0x1a4aee, 0x381c5)
	/tmp/sandbox/go/src/pkg/runtime/panic.c:520 +0xa0
runtime.newstack()
	/tmp/sandbox/go/src/pkg/runtime/stack.c:770 +0x580
runtime.morestack()
	/tmp/sandbox/go/src/pkg/runtime/asm_amd64p32.s:207 +0x80

goroutine 16 [stack growth]:

[Jan Mercl]

> On Fri Jan 23 2015 at 10:32:15 Runix <rsu...@gmail.com> wrote:
>
> Hi, this is a bug in fmt.Println or behavior described?
> http://play.golang.org/p/JbFloYc1yK

The outer append creates a cycle. The inner appends must be unpacked using ... (but then you can append only one of those at a time).

-j