Windows10+Cygwin环境下VS Code集成终端Fish Shell补全显示异常

I’ve run into this exact annoyance before—Fish’s autocomplete suggestions jumping to the next line in VS Code’s terminal almost always ties back to compatibility quirks between VS Code’s emulator and how you’re launching Fish via Cygwin. Here are a few tried-and-true fixes to resolve it:

1. Switch to VS Code’s Modern Terminal Profile System (Recommended) #

The old terminal.integrated.shell.windows setting is deprecated, and using the newer profile setup often eliminates environment-related glitches. Update your VS Code settings.json to launch Fish directly instead of routing through Bash:

"terminal.integrated.profiles.windows": {
  "Cygwin Fish": {
    "path": "C:\\Cygwin64\\bin\\fish.exe",
    "args": []
  }
},
"terminal.integrated.defaultProfile.windows": "Cygwin Fish"

This cuts out the Bash middleman entirely, which removes any weirdness introduced by /bin/xhere.

2. Tweak Bash Launch Arguments (If You Need to Keep Bash as the Entry Point) #

If you have to start via Bash for specific reasons, replace the /bin/xhere argument with a direct exec fish command to ensure Fish takes over the terminal session cleanly:

"terminal.integrated.shell.windows": "C:\\Cygwin64\\bin\\bash.exe",
"terminal.integrated.shellArgs.windows": ["-c", "exec fish"]

Using exec replaces the Bash process with Fish instead of spawning it as a child, which helps maintain proper terminal state and rendering.

3. Fix Fish’s Terminal Environment Variable #

Sometimes the issue stems from an incorrect TERM setting. Open your Fish shell in VS Code and run:

echo $TERM

If the output isn’t xterm or xterm-256color, add this line to your Fish config file (~/.config/fish/config.fish) to force a compatible terminal type:

set -x TERM xterm-256color

This ensures Fish knows how to properly render autocomplete suggestions in VS Code’s terminal.

4. Check for Custom Fish Autocomplete Tweaks #

Double-check your config.fish for any custom settings that might break autocomplete rendering. If you’ve added lines modifying fish_autosuggestion_style or fish_completion behavior, try commenting them out temporarily to see if that fixes the line jump.

内容的提问来源于stack exchange，提问作者Jay