fix

Author: qiulaidongfeng

src/cmd/internal/moddeps/moddeps_test.go

@@ -443,7 +443,14 @@ func findGorootModules(t *testing.T) []gorootModule {
 	goBin := testenv.GoToolPath(t)
 
 	goroot.once.Do(func() {
-		goroot.err = filepath.WalkDir(testenv.GOROOT(t), func(path string, info fs.DirEntry, err error) error {
+		// If the root itself is a symlink to a directory,
+		// we want to follow it (see https://go.dev/issue/64375).
+		// Add a trailing separator to force that to happen.
+		root := testenv.GOROOT(t)
+		if !os.IsPathSeparator(root[len(root)-1]) {
+			root += string(filepath.Separator)
+		}
+		goroot.err = filepath.WalkDir(root, func(path string, info fs.DirEntry, err error) error {
 			if err != nil {
 				return err
 			}

src/internal/testenv/testenv.go

@@ -252,20 +252,6 @@ func findGOROOT() (string, error) {
 		}
 	})
 
-	info, err := os.Lstat(gorootPath)
-	if err != nil {
-		return "", err
-	}
-	if info.Mode()&os.ModeSymlink != 0 {
-		gorootPath, err = os.Readlink(gorootPath)
-		if err != nil {
-			return "", err
-		}
-	}
-	if err != nil {
-		return "", err
-	}
-	os.Setenv("GOROOT", gorootPath)
 	return gorootPath, gorootErr
 }