fix(lib): go routine to assure instance context cancellation now clos…

…es properly

lib/lib.go

@@ -357,15 +357,6 @@ func OptDscache(dscache *dscache.Dscache) Option {
 // function must check whether their fields are nil or not.
 func NewInstance(ctx context.Context, repoPath string, opts ...Option) (qri *Instance, err error) {
 	log.Debugw("NewInstance", "repoPath", repoPath, "opts", opts)
-	go func() {
-		for {
-			select {
-			case <-ctx.Done():
-				log.Debug("Instance context canceled")
-			}
-		}
-	}()
-
 	ctx, cancel := context.WithCancel(ctx)
 	ok := false
 	defer func() {
@@ -374,6 +365,14 @@ func NewInstance(ctx context.Context, repoPath string, opts ...Option) (qri *Ins
 		}
 	}()
 
+	go func() {
+		select {
+		case <-ctx.Done():
+			log.Debug("Instance context canceled")
+			return
+		}
+	}()
+
 	if repoPath == "" {
 		return nil, fmt.Errorf("repo path is required")
 	}