Bennet Bo Fenner 4d8fa1caa8 sidebar: Fix double borrow on startup (#52834)
```
thread 'main' (35618165) panicked at crates/gpui/src/app/entity_map.rs:164:32:
cannot read workspace::multi_workspace::MultiWorkspace while it is already being updated
stack backtrace:
   0: __rustc::rust_begin_unwind
             at /rustc/e408947bfd200af42db322daf0fadfe7e26d3bd1/library/std/src/panicking.rs:689:5
   1: core::panicking::panic_fmt
             at /rustc/e408947bfd200af42db322daf0fadfe7e26d3bd1/library/core/src/panicking.rs:80:14
   2: gpui::app::entity_map::double_lease_panic::<workspace::multi_workspace::MultiWorkspace>
             at ./crates/gpui/src/app/entity_map.rs:208:5
   3: <gpui::app::entity_map::EntityMap>::read::<workspace::multi_workspace::MultiWorkspace>::{closure#1}
             at ./crates/gpui/src/app/entity_map.rs:164:32
   4: <core::option::Option<&workspace::multi_workspace::MultiWorkspace>>::unwrap_or_else::<<gpui::app::entity_map::EntityMap>::read<workspace::multi_workspace::MultiWorkspace>::{closure#1}>
             at /Users/bebo/.rustup/toolchains/1.94.1-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/option.rs:1067:21
   5: <gpui::app::entity_map::EntityMap>::read::<workspace::multi_workspace::MultiWorkspace>
             at ./crates/gpui/src/app/entity_map.rs:164:14
   6: <gpui::app::entity_map::Entity<workspace::multi_workspace::MultiWorkspace>>::read
             at ./crates/gpui/src/app/entity_map.rs:465:21
   7: <sidebar::Sidebar>::show_archive::{closure#0}
             at ./crates/sidebar/src/sidebar.rs:3462:15
   8: <core::option::Option<gpui::app::entity_map::Entity<workspace::multi_workspace::MultiWorkspace>>>::and_then::<gpui::app::entity_map::Entity<workspace::Workspace>, <sidebar::Sidebar>::show_archive::{closure#0}>
             at /Users/bebo/.rustup/toolchains/1.94.1-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/option.rs:1546:24
   9: <sidebar::Sidebar>::show_archive
             at ./crates/sidebar/src/sidebar.rs:3461:69
  10: <sidebar::Sidebar as workspace::multi_workspace::Sidebar>::restore_serialized_state
             at ./crates/sidebar/src/sidebar.rs:3606:22
  11: <gpui::app::entity_map::Entity<sidebar::Sidebar> as workspace::multi_workspace::SidebarHandle>::restore_serialized_state::{closure#0}
             at ./crates/workspace/src/multi_workspace.rs:216:18
  12: <gpui::app::App as gpui::AppContext>::update_entity::<sidebar::Sidebar, (), <gpui::app::entity_map::Entity<sidebar::Sidebar> as workspace::multi_workspace::SidebarHandle>::restore_serialized_state::{closure#0}>::{closure#0}
             at ./crates/gpui/src/app.rs:2397:26
  13: <gpui::app::App>::update::<(), <gpui::app::App as gpui::AppContext>::update_entity<sidebar::Sidebar, (), <gpui::app::entity_map::Entity<sidebar::Sidebar> as workspace::multi_workspace::SidebarHandle>::restore_serialized_state::{closure#0}>::{closure#0}>
             at ./crates/gpui/src/app.rs:886:22
  14: <gpui::app::App as gpui::AppContext>::update_entity::<sidebar::Sidebar, (), <gpui::app::entity_map::Entity<sidebar::Sidebar> as workspace::multi_workspace::SidebarHandle>::restore_serialized_state::{closure#0}>
             at ./crates/gpui/src/app.rs:2395:14
  15: <gpui::app::entity_map::Entity<sidebar::Sidebar>>::update::<(), gpui::app::App, <gpui::app::entity_map::Entity<sidebar::Sidebar> as workspace::multi_workspace::SidebarHandle>::restore_serialized_state::{closure#0}>
             at ./crates/gpui/src/app/entity_map.rs:481:12
  16: <gpui::app::entity_map::Entity<sidebar::Sidebar> as workspace::multi_workspace::SidebarHandle>::restore_serialized_state
             at ./crates/workspace/src/multi_workspace.rs:215:14
  17: workspace::restore_multiworkspace::{closure#0}::{closure#7}
             at ./crates/workspace/src/workspace.rs:8712:29
  18: <gpui::window::WindowHandle<workspace::multi_workspace::MultiWorkspace>>::update::<gpui::app::async_context::AsyncApp, (), workspace::restore_multiworkspace::{closure#0}::{closure#7}>::{closure#0}::{closure#1}
             at ./crates/gpui/src/window.rs:5318:43
  19: <gpui::app::App as gpui::AppContext>::update_entity::<workspace::multi_workspace::MultiWorkspace, (), <gpui::window::WindowHandle<workspace::multi_workspace::MultiWorkspace>>::update<gpui::app::async_context::AsyncApp, (), workspace::restore_multiworkspace::{closure#0}::{closure#7}>::{closure#0}::{closure#1}>::{closure#0}
             at ./crates/gpui/src/app.rs:2397:26
  20: <gpui::app::App>::update::<(), <gpui::app::App as gpui::AppContext>::update_entity<workspace::multi_workspace::MultiWorkspace, (), <gpui::window::WindowHandle<workspace::multi_workspace::MultiWorkspace>>::update<gpui::app::async_context::AsyncApp, (), workspace::restore_multiworkspace::{closure#0}::{closure#7}>::{closure#0}::{closure#1}>::{closure#0}>
             at ./crates/gpui/src/app.rs:886:22
  21: <gpui::app::App as gpui::AppContext>::update_entity::<workspace::multi_workspace::MultiWorkspace, (), <gpui::window::WindowHandle<workspace::multi_workspace::MultiWorkspace>>::update<gpui::app::async_context::AsyncApp, (), workspace::restore_multiworkspace::{closure#0}::{closure#7}>::{closure#0}::{closure#1}>
             at ./crates/gpui/src/app.rs:2395:14
  22: <gpui::app::entity_map::Entity<workspace::multi_workspace::MultiWorkspace>>::update::<(), gpui::app::App, <gpui::window::WindowHandle<workspace::multi_workspace::MultiWorkspace>>::update<gpui::app::async_context::AsyncApp, (), workspace::restore_multiworkspace::{closure#0}::{closure#7}>::{closure#0}::{closure#1}>
             at ./crates/gpui/src/app/entity_map.rs:481:12
  23: <gpui::window::WindowHandle<workspace::multi_workspace::MultiWorkspace>>::update::<gpui::app::async_context::AsyncApp, (), workspace::restore_multiworkspace::{closure#0}::{closure#7}>::{closure#0}
             at ./crates/gpui/src/window.rs:5318:21
  24: <gpui::app::App>::update_window_id::<core::result::Result<(), anyhow::Error>, <gpui::window::WindowHandle<workspace::multi_workspace::MultiWorkspace>>::update<gpui::app::async_context::AsyncApp, (), workspace::restore_multiworkspace::{closure#0}::{closure#7}>::{closure#0}>::{closure#0}
             at ./crates/gpui/src/app.rs:1561:26
  25: <gpui::app::App>::update::<core::option::Option<core::result::Result<(), anyhow::Error>>, <gpui::app::App>::update_window_id<core::result::Result<(), anyhow::Error>, <gpui::window::WindowHandle<workspace::multi_workspace::MultiWorkspace>>::update<gpui::app::async_context::AsyncApp, (), workspace::restore_multiworkspace::{closure#0}::{closure#7}>::{closure#0}>::{closure#0}>
             at ./crates/gpui/src/app.rs:886:22
  26: <gpui::app::App>::update_window_id::<core::result::Result<(), anyhow::Error>, <gpui::window::WindowHandle<workspace::multi_workspace::MultiWorkspace>>::update<gpui::app::async_context::AsyncApp, (), workspace::restore_multiworkspace::{closure#0}::{closure#7}>::{closure#0}>
             at ./crates/gpui/src/app.rs:1555:14
  27: <gpui::app::App as gpui::AppContext>::update_window::<core::result::Result<(), anyhow::Error>, <gpui::window::WindowHandle<workspace::multi_workspace::MultiWorkspace>>::update<gpui::app::async_context::AsyncApp, (), workspace::restore_multiworkspace::{closure#0}::{closure#7}>::{closure#0}>
             at ./crates/gpui/src/app.rs:2425:14
  28: <gpui::app::async_context::AsyncApp as gpui::AppContext>::update_window::<core::result::Result<(), anyhow::Error>, <gpui::window::WindowHandle<workspace::multi_workspace::MultiWorkspace>>::update<gpui::app::async_context::AsyncApp, (), workspace::restore_multiworkspace::{closure#0}::{closure#7}>::{closure#0}>
             at ./crates/gpui/src/app/async_context.rs:94:14
  29: <gpui::window::WindowHandle<workspace::multi_workspace::MultiWorkspace>>::update::<gpui::app::async_context::AsyncApp, (), workspace::restore_multiworkspace::{closure#0}::{closure#7}>
             at ./crates/gpui/src/window.rs:5313:12
  30: workspace::restore_multiworkspace::{closure#0}
             at ./crates/workspace/src/workspace.rs:8710:14
  31: zed::restore_or_create_workspace::{closure#0}
             at ./crates/zed/src/main.rs:1358:82
  32: zed::main::{closure#10}::{closure#16}::{closure#0}::<i32>
             at ./crates/zed/src/main.rs:877:84
  33: <gpui::app::App>::spawn::<zed::main::{closure#10}::{closure#16}, ()>::{closure#0}
             at ./crates/gpui/src/app.rs:1633:44
  34: <core::pin::Pin<alloc::boxed::Box<dyn core::future::future::Future<Output = ()>>> as core::future::future::Future>::poll
             at /Users/bebo/.rustup/toolchains/1.94.1-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/future/future.rs:133:9
  35: <core::pin::Pin<alloc::boxed::Box<dyn core::future::future::Future<Output = ()>>> as core::future::future::Future>::poll
             at /Users/bebo/.rustup/toolchains/1.94.1-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/future/future.rs:133:9
  36: <scheduler::executor::spawn_local_with_source_location::Checked<core::pin::Pin<alloc::boxed::Box<dyn core::future::future::Future<Output = ()>>>> as core::future::future::Future>::poll
             at ./crates/scheduler/src/executor.rs:361:64
  37: <async_task::raw::RawTask<scheduler::executor::spawn_local_with_source_location::Checked<core::pin::Pin<alloc::boxed::Box<dyn core::future::future::Future<Output = ()>>>>, (), <scheduler::executor::ForegroundExecutor>::spawn<core::pin::Pin<alloc::boxed::Box<dyn core::future::future::Future<Output = ()>>>>::{closure#0}, scheduler::RunnableMeta>>::run
             at /Users/bebo/.cargo/git/checkouts/async-task-e468f817236eac43/b4486cd/src/raw.rs:296:17
  38: <async_task::runnable::Runnable<scheduler::RunnableMeta>>::run
             at /Users/bebo/.cargo/git/checkouts/async-task-e468f817236eac43/b4486cd/src/runnable.rs:788:18
  39: gpui_macos::dispatcher::trampoline
             at ./crates/gpui_macos/src/dispatcher.rs:197:14
  40: <unknown>
  41: <unknown>
  42: <unknown>
  43: <unknown>
  44: <unknown>
  45: <unknown>
  46: <unknown>
  47: <unknown>
  48: <unknown>
  49: <unknown>
  50: <unknown>
  51: <unknown>
  52: <unknown>
  53: <() as objc::message::MessageArguments>::invoke::<()>
             at /Users/bebo/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/objc-0.2.7/src/message/mod.rs:128:17
  54: objc::message::platform::send_unverified::<objc::runtime::Object, (), ()>
             at /Users/bebo/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/objc-0.2.7/src/message/apple/mod.rs:27:9
  55: objc::message::send_message::<objc::runtime::Object, (), ()>
             at /Users/bebo/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/objc-0.2.7/src/message/mod.rs:178:5
  56: <*mut objc::runtime::Object as cocoa::appkit::NSApplication>::run
             at /Users/bebo/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/cocoa-0.26.0/src/appkit.rs:628:9
  57: <gpui_macos::platform::MacPlatform as gpui::platform::Platform>::run
             at ./crates/gpui_macos/src/platform.rs:488:17
  58: <gpui::app::Application>::run::<zed::main::{closure#10}>
             at ./crates/gpui/src/app.rs:187:18
  59: zed::main
             at ./crates/zed/src/main.rs:456:9
  60: <fn() as core::ops::function::FnOnce<()>>::call_once
             at /Users/bebo/.rustup/toolchains/1.94.1-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/ops/function.rs:250:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace
```

Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [x] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Release Notes:

- N/A
2026-03-31 19:18:15 +02:00
2026-01-22 23:57:26 +05:30
WIP
2023-12-14 09:25:14 -07:00
2024-09-30 17:46:21 -04:00
2026-03-31 16:14:26 +02:00
2026-02-03 20:31:02 -07:00
2025-02-04 09:02:59 -05:00
2025-02-04 09:02:59 -05:00
2026-01-06 12:49:51 -08:00
2025-10-27 13:27:59 -04:00
2025-10-17 18:58:14 +00:00
2026-03-17 16:34:35 +00:00

Zed

Zed CI

Welcome to Zed, a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.


Installation

On macOS, Linux, and Windows you can download Zed directly or install Zed via your local package manager (macOS/Linux/Windows).

Other platforms are not yet available:

Developing Zed

Contributing

See CONTRIBUTING.md for ways you can contribute to Zed.

Also... we're hiring! Check out our jobs page for open roles.

Licensing

License information for third party dependencies must be correctly provided for CI to pass.

We use cargo-about to automatically comply with open source licenses. If CI is failing, check the following:

  • Is it showing a no license specified error for a crate you've created? If so, add publish = false under [package] in your crate's Cargo.toml.
  • Is the error failed to satisfy license requirements for a dependency? If so, first determine what license the project has and whether this system is sufficient to comply with this license's requirements. If you're unsure, ask a lawyer. Once you've verified that this system is acceptable add the license's SPDX identifier to the accepted array in script/licenses/zed-licenses.toml.
  • Is cargo-about unable to find the license for a dependency? If so, add a clarification field at the end of script/licenses/zed-licenses.toml, as specified in the cargo-about book.

Sponsorship

Zed is developed by Zed Industries, Inc., a for-profit company.

If you’d like to financially support the project, you can do so via GitHub Sponsors. Sponsorships go directly to Zed Industries and are used as general company revenue. There are no perks or entitlements associated with sponsorship.

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