@@ -247,12 +247,14 @@ func (s *Shell) newInterp(stdout, stderr io.Writer) (*interp.Runner, error) {
247247 )
248248}
249249
250−// updateShellFromRunner updates the shell from the interpreter after execution
250+// updateShellFromRunner updates the shell from the interpreter after execution.
251251func (s *Shell) updateShellFromRunner(runner *interp.Runner) {
252252 s.cwd = runner.Dir
253− s.env = nil
253+ s.env = s.env[:0]
254254 for name, vr := range runner.Vars {
255− s.env = append(s.env, fmt.Sprintf("%s=%s", name, vr.Str))
255+ if vr.Exported {
256+ s.env = append(s.env, name+"="+vr.Str)
257+ }
256258 }
257259}
258260