Panic on file save from helix

After updating to 1.90.0 (1159e78c 2025-09-14), rust-analyzer now panics on save from the helix text editor. I think this is a rust-analyzer to kqueue thing? I don't know. I think somebody called .unwrap() on None somewhere... This didn't occur in the previous version of rust-analyzer.

rustc --version
rustc 1.90.0 (1159e78c4 2025-09-14)

rust-analyzer --version
rust-analyzer 1.90.0 (1159e78c 2025-09-14)

Toolchain:

stable-x86_64-unknown-freebsd (active, default)

The trace that appears in the helix log file when starting helix with th -vv (double verbose) flag:

2025-10-08T16:11:13.223 helix_term::application [DEBUG] document Some("./src/main.rs") saved with revision 1
2025-10-08T16:11:13.223 helix_view::document [DEBUG] doc 2 revision updated 1 -> 1
2025-10-08T16:11:13.223 helix_lsp::file_event [DEBUG] Received file event for "./src/main.rs"
2025-10-08T16:11:13.223 helix_lsp::transport [INFO] rust-analyzer -> {"jsonrpc":"2.0","method":"textDocument/didSave","params":{"textDocument":{"uri":"file:///usr/home/<redacted>/src/main.rs"}}}
2025-10-08T16:11:13.223 helix_lsp::transport [ERROR] rust-analyzer err <- "\n"
2025-10-08T16:11:13.223 helix_view::editor [DEBUG] editor status: 'src/main.rs' written, 256L 7.5KiB
2025-10-08T16:11:13.223 helix_lsp::transport [ERROR] rust-analyzer err <- "thread 'notify-rs kqueue loop' panicked at /rust/deps/kqueue-1.1.1/src/lib.rs:661:86:\n"
2025-10-08T16:11:13.223 helix_lsp::transport [ERROR] rust-analyzer err <- "called `Option::unwrap()` on a `None` value\n"
2025-10-08T16:11:13.223 helix_lsp::transport [ERROR] rust-analyzer err <- "stack backtrace:\n"
2025-10-08T16:11:13.223 helix_view::document [DEBUG] id 2 modified - last saved: 1, current: 1
2025-10-08T16:11:13.224 helix_view::document [DEBUG] id 2 modified - last saved: 1, current: 1
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "   0: __rustc::rust_begin_unwind\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "             at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:697:5\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "   1: core::panicking::panic_fmt\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "             at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:75:14\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "   2: core::panicking::panic\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "             at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:145:5\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "   3: core::option::unwrap_failed\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "             at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/option.rs:2130:5\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "   4: <kqueue::Event>::new\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "   5: <kqueue::Watcher>::poll\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "   6: <notify::kqueue::EventLoop>::event_loop_thread\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "thread 'VfsLoader' panicked at src/tools/rust-analyzer/crates/vfs-notify/src/lib.rs:93:72:\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "called `Result::unwrap()` on an `Err` value: RecvError\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "stack backtrace:\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "   0: __rustc::rust_begin_unwind\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "             at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:697:5\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "   1: core::panicking::panic_fmt\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "             at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:75:14\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "   2: core::result::unwrap_failed\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "             at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1765:5\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "   3: <vfs_notify::NotifyActor>::run\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "thread 'VfsLoader' panicked at /rust/deps/notify-8.0.0/src/kqueue.rs:454:51:\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "called `Result::unwrap()` on an `Err` value: SendError { .. }\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "stack backtrace:\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "   0:      0x1cbbfd38732 - std::backtrace_rs::backtrace::libunwind::trace::h26096fd07ff9cc89\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "   1:      0x1cbbfd38732 - std::backtrace_rs::backtrace::trace_unsynchronized::hf86b6ec1f523b9b4\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "   2:      0x1cbbfd38732 - std::sys::backtrace::_print_fmt::h45728bf87fd11340\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:66:9\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "   3:      0x1cbbfd38732 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h7c9cbdf02bb2e1b7\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:39:26\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "   4:      0x1cbbfd83e03 - core::fmt::rt::Argument::fmt::hedc100a2d4739be8\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/rt.rs:173:76\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "   5:      0x1cbbfd83e03 - core::fmt::write::h817f4f1848439eb3\n"
2025-10-08T16:11:13.259 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:1468:25\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "   6:      0x1cbbfd2d703 - std::io::default_write_fmt::heb93a1d0f8d59f14\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:639:11\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "   7:      0x1cbbfd2d703 - std::io::Write::write_fmt::h24993c1620618c82\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:1954:13\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "   8:      0x1cbbfd38582 - std::sys::backtrace::BacktraceLock::print::h3eef05bc61231a27\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:42:9\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "   9:      0x1cbbfd3c179 - std::panicking::default_hook::{{closure}}::ha405eb770fc1eefa\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:300:27\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "  10:      0x1cbbfd3bf5b - std::panicking::default_hook::h884335182fbcdefd\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:327:9\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "  11:      0x1c394854222 - <base_db[4d5be0539356339c]::DbPanicContext>::enter::set_hook::{closure#0}\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "  12:      0x1cbbfd3cc3e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h6d251b0796e1693d\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "  13:      0x1cbbfd3cc3e - std::panicking::rust_panic_with_hook::hd95979e0b546d02f\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:841:13\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "  14:      0x1cbbfd3c92a - std::panicking::begin_panic_handler::{{closure}}::hb9b547bda4a116ee\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:706:13\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "  15:      0x1cbbfd38c39 - std::sys::backtrace::__rust_end_short_backtrace::h53e9b29e1d79cf30\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:174:18\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "  16:      0x1cbbfd3c5bd - __rustc[de2ca18b4c54d5b8]::rust_begin_unwind\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:697:5\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "  17:      0x1cbb92168a0 - core::panicking::panic_fmt::h40191d3ad235d4be\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:75:14\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "  18:      0x1cbb9216e36 - core::result::unwrap_failed::h6a27373538489c22\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1765:5\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "  19:      0x1c3936a8630 - <notify[9317c645f9b1353f]::kqueue::KqueueWatcher as core[1844df0e6a7872ab]::ops::drop::Drop>::drop\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "  20:      0x1c39367b627 - core[1844df0e6a7872ab]::ptr::drop_in_place::<core[1844df0e6a7872ab]::option::Option<(notify[9317c645f9b1353f]::kqueue::KqueueWatcher, crossbeam_channel[75b8ab8498c2a565]::channel::Receiver<core[1844df0e6a7872ab]::result::Result<notify_types[1924f33f0f1f26b7]::event::Event, notify[9317c645f9b1353f]::error::Error>>)>>\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "  21:      0x1c39368043d - <vfs_notify[879755db1592f639]::NotifyActor>::run\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "  22:      0x1c3936847d1 - std[c65862411a34f917]::sys::backtrace::__rust_begin_short_backtrace::<<stdx[159ecc9f681aaf82]::thread::Builder>::spawn<<vfs_notify[879755db1592f639]::NotifyHandle as vfs[c1fac3d79fe124a3]::loader::Handle>::spawn::{closure#0}, ()>::{closure#0}, ()>\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "  23:      0x1c393687ca5 - <<std[c65862411a34f917]::thread::Builder>::spawn_unchecked_<<stdx[159ecc9f681aaf82]::thread::Builder>::spawn<<vfs_notify[879755db1592f639]::NotifyHandle as vfs[c1fac3d79fe124a3]::loader::Handle>::spawn::{closure#0}, ()>::{closure#0}, ()>::{closure#1} as core[1844df0e6a7872ab]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "  24:      0x1cbbfd402af - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h92216d430ee7df04\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1971:9\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "  25:      0x1cbbfd402af - std::sys::pal::unix::thread::Thread::new::thread_start::hf6e4ba5ac025e39f\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "                               at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/pal/unix/thread.rs:107:17\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "  26:      0x1cbb78f2b52 - <unknown>\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "thread 'VfsLoader' panicked at library/core/src/panicking.rs:233:5:\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "panic in a destructor during cleanup\n"
2025-10-08T16:11:13.260 helix_lsp::transport [ERROR] rust-analyzer err <- "thread caused non-unwinding panic. aborting.\n"
2025-10-08T16:11:14.011 helix_view::document [DEBUG] id 2 modified - last saved: 1, current: 1
2025-10-08T16:11:14.011 helix_view::document [DEBUG] id 2 modified - last saved: 1, current: 1
2025-10-08T16:11:14.177 helix_view::document [DEBUG] id 2 modified - last saved: 1, current: 1
2025-10-08T16:11:14.178 helix_view::document [DEBUG] id 2 modified - last saved: 1, current: 1
2025-10-08T16:11:14.430 helix_term::application [DEBUG] received editor event: IdleTimer
2025-10-08T16:11:14.520 helix_term::application [DEBUG] received editor event: LanguageServerMessage((LanguageServerId(1v1), Notification(Notification { jsonrpc: None, method: "exit", params: None })))
2025-10-08T16:11:14.520 helix_view::editor [DEBUG] editor status: Language server exited
2025-10-08T16:11:14.520 helix_lsp::file_event [DEBUG] Removing LSP client: 1v1
2025-10-08T16:11:14.520 helix_lsp::transport [ERROR] rust-analyzer err: <- StreamClosed
2025-10-08T16:11:14.556 helix_term::application [DEBUG] received editor event: Redraw
2025-10-08T16:11:14.556 helix_view::document [DEBUG] id 2 modified - last saved: 1, current: 1
2025-10-08T16:11:14.557 helix_view::document [DEBUG] id 2 modified - last saved: 1, current: 1

Good luck! Let me know if there's any other data I can provide.

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