Fix no child processes error (#2048)

pkg/errors/command.go

@@ -0,0 +1,15 @@
+package errors
+
+import "strings"
+
+// IsNoChildProcessesErr returns true for an error from
+// exec.Command().Run() that can be safely ignored.
+// Reference: https://github.com/slimtoolkit/slim/blob/79b63a80c10083ece51be0ef1fd1e7c090ff6346/pkg/util/errutil/errutil.go#L95-L110
+func IsNoChildProcessesErr(err error) bool {
+	if err == nil {
+		return false
+	}
+
+	return strings.Contains(err.Error(), "wait: no child processes") ||
+		strings.Contains(err.Error(), "waitid: no child processes")
+}

pkg/module/go_get_fetcher.go

@@ -143,7 +143,7 @@ func downloadModule(
 	cmd.Stderr = stderr
 
 	err := cmd.Run()
-	if err != nil {
+	if err != nil && !errors.IsNoChildProcessesErr(err) {
 		err = fmt.Errorf("%w: %s", err, stderr)
 		var m goModule
 		if jsonErr := json.NewDecoder(stdout).Decode(&m); jsonErr != nil {

pkg/module/go_vcs_lister.go

@@ -81,7 +81,7 @@ func (l *vcsLister) List(ctx context.Context, module string) (*storage.RevInfo,
 		cmd.Env = prepareEnv(gopath, l.env)
 
 		err = cmd.Run()
-		if err != nil {
+		if err != nil && !errors.IsNoChildProcessesErr(err) {
 			err = fmt.Errorf("%w: %s", err, stderr)
 			if errors.IsErr(timeoutCtx.Err(), context.DeadlineExceeded) {
 				return nil, errors.E(op, err, errors.KindGatewayTimeout)