Description

brew upgrade, brew uninstall, and brew info all fail for casks that were originally installed with the now-removed appcast DSL method. This makes it impossible to manage (upgrade or uninstall) these casks.

Reproduction

$ brew upgrade
Error: Unexpected method 'appcast' called on Cask qlimagesize.

$ brew uninstall --cask --force qlimagesize
Error: Unexpected method 'appcast' called on Cask qlimagesize.

$ brew info --cask qlimagesize
Error: Unexpected method 'appcast' called on Cask qlimagesize.

The same errors occur for qlcolorcode.

Expected behavior

Homebrew should gracefully ignore or handle the removed appcast method in cached/receipt cask definitions so that users can at least uninstall orphaned casks.

System configuration

HOMEBREW_VERSION: 5.0.14
macOS: 26.3-x86_64
Homebrew Ruby: 3.4.8
Xcode: 26.2

Affected casks

• qlimagesize 2.6.1 (removed from homebrew-cask, still in /usr/local/Caskroom)
• qlcolorcode 2.1.0 (deprecated in homebrew-cask, upgrade to 4.1.0 fails)

Both casks were installed before appcast was removed from the Cask DSL.