• are reporting a bug others will be able to reproduce and not asking a question. If you're not sure or want to ask a question do so on our Discourse: https://discourse.brew.sh
• have a problem with brew install (or upgrade, reinstall) a single, official formula (not cask)? If it's a general brew problem please file this issue at Homebrew/brew: https://github.com/Homebrew/brew/issues/new/choose. If it's a brew cask problem please file this issue at https://github.com/Homebrew/homebrew-cask/issues/new/choose. If it's a tap (e.g. Homebrew/homebrew-php) problem please file this issue at the tap.
• ran brew update and can still reproduce the problem?
• ran brew doctor, fixed all issues and can still reproduce the problem?
• ran brew gist-logs <formula> (where <formula> is the name of the formula that failed) and included the output link?
• if brew gist-logs didn't work: ran brew config and brew doctor and included their output with your issue?

To help us debug your issue please explain:

• What you were trying to do (and why)

The package commandbox has an official package without a devel block ( due to the fact that the SHA is constantly changing as the bleeding edge version is overwritten on builds ). The tap located at ( https://github.com/Ortus-Solutions/homebrew-boxtap/blob/master/commandbox.rb ) has the devel block, which is is updated with the SHA when Travis builds a new bleeding edge release

• What happened (include command output)

When the tap above is pinned, the brew install commandbox command fails due to the core file being parsed first ( which is contrary to the order of parsing specified in the documentation ). When that file is parsed the installation fails with the error:

Error: No devel block is defined for commandbox

• What you expected to happen

Pinned taps should be parsed first before core package versions

• Step-by-step reproduction instructions (by running brew install commands)

brew tap ortus-solutions/boxtap
brew tap-pin ortus-solutions/boxtap
brew install --devel commandbox