From 34375d13392df3c1a34244455613e844dba662cd Mon Sep 17 00:00:00 2001
From: Joe <joe.melsha@live.com>
Date: Thu, 12 Mar 2026 19:48:17 -0500
Subject: [PATCH] fix: restore RescanRequired classification in debouncer-full
 error handler

The non-macOS debouncer-full error callback was classifying all errors
as WatcherError, missing the empty-paths check that identifies rescan
requests. The default error handler treats RescanRequired as recoverable
(log + continue) but WatcherError as fatal (process::exit). This meant
inotify queue overflows would kill the process instead of triggering
a recoverable rescan.
---
 crates/memofs/src/std_backend.rs | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/crates/memofs/src/std_backend.rs b/crates/memofs/src/std_backend.rs
index 071cffcc..0290f0ce 100644
--- a/crates/memofs/src/std_backend.rs
+++ b/crates/memofs/src/std_backend.rs
@@ -198,9 +198,13 @@ impl StdBackend {
                     }
                     Err(errors) => {
                         for error in errors {
-                            let critical_err = WatcherCriticalError::WatcherError {
-                                error: format!("{:?}", error.kind),
-                                path: error.paths.first().cloned(),
+                            let critical_err = if error.paths.is_empty() {
+                                WatcherCriticalError::RescanRequired
+                            } else {
+                                WatcherCriticalError::WatcherError {
+                                    error: format!("{:?}", error.kind),
+                                    path: error.paths.first().cloned(),
+                                }
                             };
                             let _ = error_tx.send(critical_err.clone());
                             if error_handler(critical_err) {