Mismatched types

[ldez]

The following program sample.go triggers a panic:

package main

import "fmt"

type Foo string
type Bar string

func main() {
	f := Foo("test")
	b := Bar("test")
	fmt.Println(f == b) // Error
}

Expected result:

$ go run ./sample.go
_test/type8.go:11:16: invalid operation: f == b (mismatched types Foo and Bar)

Got:

$ dyngo ./sample.go
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
	panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x604c49]

goroutine 1 [running]:
github.com/containous/dyngo/interp.runCfg.func1(0xc0001943c0)
	/home/ldez/sources/go/src/github.com/containous/dyngo/interp/run.go:103 +0x134
panic(0xbe9e00, 0x1650f30)
	/home/ldez/.gvm/gos/go1.11.5/src/runtime/panic.go:513 +0x1b9
github.com/containous/dyngo/interp.equal.func8(0xc0001943c0, 0xc0001c9b00)
	/home/ldez/sources/go/src/github.com/containous/dyngo/interp/op.go:782 +0x49
github.com/containous/dyngo/interp.runCfg(0xc0001f9b00, 0xc0001943c0)
	/home/ldez/sources/go/src/github.com/containous/dyngo/interp/run.go:108 +0x62
github.com/containous/dyngo/interp.(*Interpreter).run(0xc000200070, 0xc0001f9200, 0xc000194370)
	/home/ldez/sources/go/src/github.com/containous/dyngo/interp/run.go:90 +0xa6
github.com/containous/dyngo/interp.(*Interpreter).Eval(0xc000200070, 0xc000204000, 0x8f, 0xca583f, 0x4, 0xc000200070, 0x0, 0x115f2e0)
	/home/ldez/sources/go/src/github.com/containous/dyngo/interp/interp.go:236 +0x4c3
main.main()
	/home/ldez/sources/go/src/github.com/containous/dyngo/dyngo.go:50 +0x334
exit status 2