Lukas Wirth
8d5689a7fa
In `BlockMap::sync`, blocks within an edited region are sorted and processed sequentially. Each block placement computes `rows_before_block` by subtracting `new_transforms.summary().input_rows` from the block's target position. The `Near`/`Below` cases have a guard that skips the block if the target is already behind the current progress, but `Above` and `Replace` were missing this guard. When a `Replace` block (tie_break 0) is processed before an `Above` block (tie_break 1) at the same or overlapping position, the `Replace` block consumes multiple input rows, advancing `input_rows` past the `Above` block's position. The subsequent `position - input_rows` subtraction underflows on `u32`, producing a huge `RowDelta` that wraps `wrap_row_end` past `wrap_row_start`, creating an inverted range that propagates through the display map layers and panics as `begin <= end (47 <= 0)` in a rope chunk slice. Add underflow guards to `Above` and `Replace`, matching the existing pattern in `Near`/`Below`. Release Notes: - Fixed a source of underflowing subtractions causing spurious panics
Zed
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:
- Web (tracking issue)
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 specifiederror for a crate you've created? If so, addpublish = falseunder[package]in your crate's Cargo.toml. - Is the error
failed to satisfy license requirementsfor 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 theacceptedarray inscript/licenses/zed-licenses.toml. - Is
cargo-aboutunable to find the license for a dependency? If so, add a clarification field at the end ofscript/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.