Panic when using short variable declaration in select...case

[tweekmonster]

Minimal reproduction:

package main

import "time"

func test() {
	t := time.NewTicker(time.Second)
	select {
	case _, ok := <-t.C:
		// Panics in here
	}
}

This works without panicking:

package main

import "time"

func test() {
	t := time.NewTicker(time.Second)
	var ok bool
	select {
	case _, ok = <-t.C:
		// No panic
	}
}

Debug log:

2017/02/20 10:08:02 Cursor at: 124
2017/02/20 10:08:02 -------------------------------------------------------
package main

import "time"

func test() {
        t := time.NewTicker(time.Second)
        select {
        case _, ok := <-t.C:
                // Panics in #here
        }
}
2017/02/20 10:08:02 -------------------------------------------------------
2017/02/20 10:08:02 Found "time" at "/home/tallen/.local/go/1.8/pkg/linux_amd64/time.a"
panic: runtime error: invalid memory address or nil pointer dereference
1(runtime.call32): /home/tallen/.local/go/1.8/src/runtime/asm_amd64.s:514
2(runtime.gopanic): /home/tallen/.local/go/1.8/src/runtime/panic.go:489
3(runtime.panicmem): /home/tallen/.local/go/1.8/src/runtime/panic.go:63
4(runtime.sigpanic): /home/tallen/.local/go/1.8/src/runtime/signal_unix.go:290
5(main.(*auto_complete_file).process_select_stmt): /home/tallen/.local/share/go/src/github.com/nsf/gocode/autocompletefile.go:246
6(main.(*auto_complete_file).process_stmt): /home/tallen/.local/share/go/src/github.com/nsf/gocode/autocompletefile.go:220
7(main.(*auto_complete_file).process_block_stmt): /home/tallen/.local/share/go/src/github.com/nsf/gocode/autocompletefile.go:159
8(main.(*auto_complete_file).process_decl_locals): /home/tallen/.local/share/go/src/github.com/nsf/gocode/autocompletefile.go:122
9(main.(*auto_complete_file).process_data): /home/tallen/.local/share/go/src/github.com/nsf/gocode/autocompletefile.go:106
10(main.(*auto_complete_context).apropos): /home/tallen/.local/share/go/src/github.com/nsf/gocode/autocompletecontext.go:298
11(main.server_auto_complete): /home/tallen/.local/share/go/src/github.com/nsf/gocode/server.go:202
12(main.(*RPC).RPC_auto_complete): /home/tallen/.local/share/go/src/github.com/nsf/gocode/rpc.go:26
13(runtime.call64): /home/tallen/.local/go/1.8/src/runtime/asm_amd64.s:515
14(reflect.Value.call): /home/tallen/.local/go/1.8/src/reflect/value.go:434
15(reflect.Value.Call): /home/tallen/.local/go/1.8/src/reflect/value.go:302
16(net/rpc.(*service).call): /home/tallen/.local/go/1.8/src/net/rpc/server.go:387
17(runtime.goexit): /home/tallen/.local/go/1.8/src/runtime/asm_amd64.s:2197

[zchee]

@nsf I trying solve it.
It works and passes the test, but I'm not confident the correct fix. (really. just short development)
zchee@2ec8ad0
Edit: rebased

However, current master also can't get var ok bool variable candidates on following the sample code. (got onlyvar foo #time.Time)
But also solved it.

package main

import "time"

func test() {
	t := time.NewTicker(time.Second)
	select {
	case foo, ok := <-t.C:
		#
	}
}

If correct fix and you like it, I'll send a pull request.

[nsf]

I'll take a look at this and other bugs tomorrow.

[nsf]

You're right about missing ok bool, maybe one day I'll fix it. In the mean time I fixed the panic. Will open a separate issue for "ok" part here: #431