panic: interface conversion: interface is []interface { }, not int

[gopherbot]

by rodseth:

What steps will reproduce the problem?
1. Compile and run the attached source file

What is the expected output?
2
6
15
24

What do you see instead?
2
6
15
panic: interface conversion: interface is []interface { }, not int

runtime.panic+0xac /tmp/yaourt-tmp-alexander/aur-go-hg/src/go/src/pkg/runtime/proc.c:1028
    runtime.panic(0x43f420, 0xf84001ed90)
assertE2Tret+0xfb /tmp/yaourt-tmp-alexander/aur-go-hg/src/go/src/pkg/runtime/iface.c:298
    assertE2Tret(0x43d450, 0x440aa0, 0xf8400013a0, 0x7f277b262ed8, 0xf8400013a0, ...)
runtime.assertE2T+0x33
/tmp/yaourt-tmp-alexander/aur-go-hg/src/go/src/pkg/runtime/iface.c:280
    runtime.assertE2T(0x43d450, 0x440aa0, 0xf8400013a0, 0x40743d)
main.Sum+0x88 /home/alexander/goprojects/variadic/variadic.go:20
    main.Sum(0xf8400013b0, 0x100000001, 0x300000003, 0x440aa0, 0xf8400013a0, ...)
main.test4+0x135 /home/alexander/goprojects/variadic/variadic.go:48
    main.test4()
main.main+0x27 /home/alexander/goprojects/variadic/variadic.go:55
    main.main()
runtime.mainstart+0xf
/tmp/yaourt-tmp-alexander/aur-go-hg/src/go/src/pkg/runtime/amd64/asm.s:77
    runtime.mainstart()
runtime.goexit /tmp/yaourt-tmp-alexander/aur-go-hg/src/go/src/pkg/runtime/proc.c:180
    runtime.goexit()
----- goroutine created by -----
_rt0_amd64+0x8e /tmp/yaourt-tmp-alexander/aur-go-hg/src/go/src/pkg/runtime/amd64/asm.s:64

Which compiler are you using (5g, 6g, 8g, gccgo)?
6g

Which operating system are you using?
64-bit Arch Linux

Which revision are you using?  (hg identify)
revision 7798

Please provide any additional information below.
I experienced this while trying to learn about "variadic".

Go was installed using this Arch Linux package:
http://aur.archlinux.org/packages.php?ID=33695

I also don't understand why uncommenting the Printf stops it from compiling, but that's
beside the point.

Thank you.

Attachments:

1. variadic.go (917 bytes)

[rsc]

Comment 2:

Status: WorkingAsIntended
use Sum(interfaces...) to pass the slice directly

[rsc]

Comment 3:

Status changed to WorkingAsIntended.

[gopherbot]

Comment 4 by rodseth:

Ok. Thank you.