1 files changed, 11 insertions, 13 deletions
diff --git a/src/cmd/folders.rs b/src/cmd/folders.rs
index b6f7209..b50daa9 100644
--- a/src/cmd/folders.rs
+++ b/src/cmd/folders.rs
@@ -1,26 +1,24 @@
 use std::collections::BTreeSet;
 use std::ffi::{OsStr, OsString};
 use std::path::{Path, PathBuf};
-use std::sync::OnceLock;
+use std::sync::LazyLock;
 
 use protobuf::Message as _;
 
 use crate::error::Result;
 use crate::pb3::jwebmail::{FoldersReq, FoldersResp};
 
-static REQUIRED_MAILDIR_DIRS: OnceLock<BTreeSet<OsString>> = OnceLock::new();
+static REQUIRED_MAILDIR_DIRS: LazyLock<BTreeSet<OsString>> = LazyLock::new(|| {
+    [
+        OsString::from("cur"),
+        "new".into(),
+        "tmp".into(),
+        "maildirfolder".into(),
+    ]
+    .into()
+});
 
 fn is_mailsubdir(p: &Path) -> bool {
-    let rmd = REQUIRED_MAILDIR_DIRS.get_or_init(|| {
-        [
-            OsString::from("cur"),
-            "new".into(),
-            "tmp".into(),
-            "maildirfolder".into(),
-        ]
-        .into()
-    });
-
     p.is_dir()
         && p.file_name()
             .map_or(false, |fname| fname.to_string_lossy().starts_with('.'))
@@ -32,7 +30,7 @@ fn is_mailsubdir(p: &Path) -> bool {
                         .and_then(|dir_entry| dir_entry.path().file_name().map(OsStr::to_owned))
                 })
                 .collect::<BTreeSet<_>>()
-                .is_superset(rmd)
+                .is_superset(&*REQUIRED_MAILDIR_DIRS)
             })
             .unwrap_or_default()
 }