Crash in log_muncher.rb:38 nil is not a symbol (TypeError)

[Piasy]

When I run replicant in my zsh, it just output error messages in below:

/Library/Ruby/Gems/2.0.0/gems/replicant-adb-1.0.1/lib/replicant/log_muncher.rb:38:in `private': nil is not a symbol (TypeError)
    from /Library/Ruby/Gems/2.0.0/gems/replicant-adb-1.0.1/lib/replicant/log_muncher.rb:38:in `<class:LogMuncher>'
    from /Library/Ruby/Gems/2.0.0/gems/replicant-adb-1.0.1/lib/replicant/log_muncher.rb:1:in `<top (required)>'
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Library/Ruby/Gems/2.0.0/gems/replicant-adb-1.0.1/lib/replicant.rb:8:in `<top (required)>'
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Library/Ruby/Gems/2.0.0/gems/replicant-adb-1.0.1/bin/replicant:3:in `<top (required)>'
    from /usr/local/bin/replicant:23:in `load'
    from /usr/local/bin/replicant:23:in `<main>'