Nil pointer panic with go 1.8.1

[candlerb]

This is with Ubuntu 16.04 with the "official" go 1.8.1 distribution in /usr/local/go

I am trying to run the example code at https://github.com/nimajalali/go-force/blob/master/README.md

$ go run test-force.go
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x48 pc=0x60ee96]

goroutine 1 [running]:
github.com/nimajalali/go-force/force.(*ForceApi).GetSObject(0xc420058240, 0x69a5e8, 0xe, 0x0, 0x0, 0x0, 0x7a4c40, 0xc4200188f0, 0x699eb7, 0xc)
	/home/ubuntu/go/src/github.com/nimajalali/go-force/force/sobjects.go:75 +0x86
main.main()
	/home/ubuntu/go/src/test-force/test-force.go:45 +0x1a5
exit status 2

Attempting to get a bit more info with gdb:

go build -gcflags "-N -l"
...
gdb -d $(go env GOROOT) ./test-force
...
run
...
[Switching to Thread 0x7ffff67ee700 (LWP 5972)]
0x000000000060ee96 in github.com/nimajalali/go-force/force.(*ForceApi).GetSObject (
    forceApi=0xc420058240, id=..., fields=..., out=..., err=...)
    at /home/ubuntu/go/src/github.com/nimajalali/go-force/force/sobjects.go:75
75		uri := strings.Replace(forceApi.apiSObjects[out.ApiName()].URLs[rowTemplateKey], idKey, id, 1)
(gdb) info args
forceApi = 0xc420058240
id = 0x69a5e8 "Your-Object-ID"
fields = {array = 0x0, len = 0, cap = 0}
out = {tab = 0x7a4c40 <com/nimajalali/go-force/force.SObject>, data = 0xc4200188f0}
err = {tab = 0x699eb7, data = 0xc}
(gdb) info locals
value·3.len = 842350821952
uri.len = 0
v·1 = 0xc4200fdd50
value·3.ptr = 0x410b18 <runtime.newobject+56> "H\213D$\030H\211D$8H\213l$ H\203\304(\303\350\217\"\004"
uri.ptr = 0xb0 <error: Cannot access memory at address 0xb0>
(gdb)

I am quite happy of course that there will be no object with ID "Your-Object-ID"; and maybe the credentials I supplied are invalid (although they seem OK, e.g. if I alter the password I get an authentication error)

But either way, I don't think go-force should panic in this situation.

[candlerb]

Maybe duplicate of #14 ?

[candlerb]

Yes I think this is a duplicate; the problem goes away if I change to some well-known object type like

func (t *SomeCustomSObject) ApiName() string {
        return "Account"
}

and now I get a sensible error:

force.ApiError{Fields:[]string(nil), Message:"Provided external ID field does not exist or is not accessible: Your-Object-ID", ErrorCode:"NOT_FOUND", ErrorName:"", ErrorDescription:""}

[nimajalali]

@candlerb Closing since duplicate of #14