Looks like this was reported at https://github.com/JuliaLang/Homebrew.jl/issues/139 - might want to click "subscribe" there or leave a comment saying you're also having the same issue, in case more information is needed to debug what's happening.
On Tuesday, August 2, 2016 at 7:24:51 AM UTC-7, Tony Kelman wrote: > > Homebrew might be using a lock file or something that has gotten in a > strange state. You might want to open an issue on github at > JuliaLang/Homebrew.jl and cc @staticfloat who is the primary author of that > package.
