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Justin M. Keyes 40ab941f79 test: improve Nvim EOF handling (for Windows CI) #40841
Problem:
Mysterious Windows CI failure points to resource exhaustion, but we have
no visibility/instrumentation:

    RUN      T610 nvim_set_keymap, nvim_del_keymap can set mappings with special characters, lhs: <S-Left>, rhs: <S-Left>: 93.70 ms OK
    RUN      T611 nvim_set_keymap, nvim_del_keymap can set mappings with special characters, lhs: <S-Left>, rhs: <F12><F2><Tab>: 49.48 ms FAIL
    …\testnvim.lua:144: EOF was received from Nvim. Likely the Nvim process crashed.
    stack traceback:
            D:/a/neovim/neovim/test/functional/testnvim.lua:144: in function 'nvim_set_keymap'
            …/api/keymap_spec.lua:769: in function <…/api/keymap_spec.lua:768>
    RUN      T612 nvim_set_keymap, nvim_del_keymap can set mappings with special characters, lhs: <S-Left>, rhs: <Space><Tab>: 18.49 ms FAIL
    …\testnvim.lua:144: EOF was received from Nvim. Likely the Nvim process crashed.
    stack traceback:
            D:/a/neovim/neovim/test/functional/testnvim.lua:144: in function 'nvim_set_keymap'
            …/api/keymap_spec.lua:769: in function <.../build/Xtest_xdg_api/test/functional/api/keymap_spec.lua:768>

Solution:
Append the child exit-code and signal to the "EOF … crashed" message.

Example:

    Nvim EOF (crash?) exit code: 42 (0x0000002A)

On the next failing Windows run, the first crash line will classify the failure:
- 0xC0000005 → access violation (nvim bug)
- 0xC0000374 → heap corruption (nvim bug)
- spawn/resource error or "clean" exit-code → system resource exhaustion
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Neovim

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Neovim is a project that seeks to aggressively refactor Vim in order to:

See the Introduction wiki page and Roadmap for more information.

Features

See :help nvim-features for the full list, and :help news for noteworthy changes in the latest version!

Install from package

Pre-built packages for Windows, macOS, and Linux are found on the Releases page.

Managed packages are in Homebrew, Debian, Ubuntu, Fedora, Arch Linux, Void Linux, Gentoo, and more!

Install from source

See BUILD.md and supported platforms for details.

The build is CMake-based, but a Makefile is provided as a convenience. After installing the dependencies, run the following command.

make CMAKE_BUILD_TYPE=RelWithDebInfo
sudo make install

To install to a non-default location:

make CMAKE_BUILD_TYPE=RelWithDebInfo CMAKE_INSTALL_PREFIX=/full/path/
make install

CMake hints for inspecting the build:

  • cmake --build build --target help lists all build targets.
  • build/CMakeCache.txt (or cmake -LAH build/) contains the resolved values of all CMake variables.
  • build/compile_commands.json shows the full compiler invocations for each translation unit.

Transitioning from Vim

See :help nvim-from-vim for instructions.

Project layout

├─ cmake/           CMake utils
├─ cmake.config/    CMake defines
├─ cmake.deps/      subproject to fetch and build dependencies (optional)
├─ runtime/         plugins and docs
├─ src/nvim/        application source code (see src/nvim/README.md)
│  ├─ api/          API subsystem
│  ├─ eval/         Vimscript subsystem
│  ├─ event/        event-loop subsystem
│  ├─ generators/   code generation (pre-compilation)
│  ├─ lib/          generic data structures
│  ├─ lua/          Lua subsystem
│  ├─ msgpack_rpc/  RPC subsystem
│  ├─ os/           low-level platform code
│  └─ tui/          built-in UI
└─ test/            tests (see test/README.md)

License

Neovim contributions since b17d96 are licensed under the Apache 2.0 license, except for contributions copied from Vim (identified by the vim-patch token). See LICENSE.txt for details.

Description
Vim-fork focused on extensibility and usability
Readme 441 MiB
Languages
Vim Script 40%
Lua 32.4%
C 26.7%
CMake 0.4%
Zig 0.2%
Other 0.1%