Error when starting Sinatra: “tried to create Proc object without a block”

Question

I am very new to ruby / rails and have an issue that I have not been able to figure out but feel it should be relatively simple to fix.

Command:

Answer 1

From what I can tell, and I've encountered this before, v1.2.5 of Sinatra is the problem. v1.2.3 doesn't do it, so try

gem install sinatra -v 1.2.3

to install the previous version, then add:

gem 'sinatra', '=1.2.3'

before the require statement.

This is documented as an issue.

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EDIT: Sinatra just bumped to a new version, 1.2.6, which fixes this problem. Use gem update sinatra, followed by gem uninstall sinatra -v 1.2.5 to remove the old, buggy, version.