Add error message on running of nil program

antonmedv · antonmedv · commit 0d28b64fa26c · 2020-02-14T14:06:05.000+03:00
diff --git a/vm/vm.go b/vm/vm.go
@@ -10,6 +10,10 @@ import (
 )
 
 func Run(program *Program, env interface{}) (out interface{}, err error) {
+	if program == nil {
+		return nil, fmt.Errorf("program is nil")
+	}
+
 	vm := NewVM(false)
 
 	defer func() {

Original file line number	Diff line number	Diff line change
`@@ -10,6 +10,10 @@ import (`
`10`	`10`	`)`
`11`	`11`
`12`	`12`	`func Run(program *Program, env interface{}) (out interface{}, err error) {`
	`13`	`+ if program == nil {`
	`14`	`+ return nil, fmt.Errorf("program is nil")`
	`15`	`+ }`
	`16`	`+`
`13`	`17`	`vm := NewVM(false)`
`14`	`18`
`15`	`19`	`defer func() {`