@@ -2,6 +2,7 @@ package service
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"io"
 	"log"
@@ -67,7 +68,7 @@
 	return nil
 }
 
-func (c *ServiceCommand) UploadPack() error {
+func (c *ServiceCommand) UploadPack() (err error) {
 	cmd := exec.Command("git", []string{
 		"-c", "uploadpack.allowFilter=true",
 		"upload-pack",
@@ -79,13 +80,23 @@ cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
 
 	stdoutPipe, _ := cmd.StdoutPipe()
 	cmd.Stderr = cmd.Stdout
-	defer stdoutPipe.Close()
+	defer func() {
+		err2 := stdoutPipe.Close()
+		if err == nil {
+			err = errors.Join(err, err2)
+		}
+	}()
 
 	stdinPipe, err := cmd.StdinPipe()
 	if err != nil {
 		return err
 	}
-	defer stdinPipe.Close()
+	defer func() {
+		err2 := stdinPipe.Close()
+		if err == nil {
+			err = errors.Join(err, err2)
+		}
+	}()
 
 	if err := cmd.Start(); err != nil {
 		log.Printf("git: failed to start git-upload-pack: %s", err)
@@ -96,7 +107,6 @@ if _, err := io.Copy(stdinPipe, c.Stdin); err != nil {
 		log.Printf("git: failed to copy stdin: %s", err)
 		return err
 	}
-	stdinPipe.Close()
 
 	if _, err := io.Copy(newWriteFlusher(c.Stdout), stdoutPipe); err != nil {
 		log.Printf("git: failed to copy stdout: %s", err)