binding_group is not defined

[lagden]

Describe the bug

It does not render the snippet with bind:group when the object is passed as an argument.
Looking at the JS Output code, it seems that the binding_group is generated out of scope.

Reproduction

Binding Group A - Fail
https://svelte.dev/playground/4d107a918fcc4f80b80ff51208639ab7?version=5.18.0

Binding Group B - Ok
https://svelte.dev/playground/4fc19fe1807c4702ab850a24a4532486?version=5.18.0

Logs

binding_group is not defined in App.svelte

System Info

System:
  OS: macOS 15.2
  CPU: (8) arm64 Apple M2
  Memory: 155.86 MB / 8.00 GB
  Shell: 3.6.4 - /opt/homebrew/bin/fish
Binaries:
  Node: 23.5.0 - /opt/homebrew/bin/node
  npm: 10.9.2 - /opt/homebrew/bin/npm
  pnpm: 9.8.0 - ~/Library/pnpm/pnpm
Browsers:
  Chrome: 131.0.6778.265
  Chrome Canary: 134.0.6960.0
  Safari: 18.2

Severity

annoyance