ruby on rails - heroku push error: "rake assets:precompile rake aborted!" -

ruby on rails - heroku push error: "rake assets:precompile rake aborted!" -

i'm trying force changes heroku next command: git force heroku master

when running rake assets:precompile, next error(s):

-----> preparing app rails asset pipeline running: rake assets:precompile rake aborted! nameerror: undefined local variable or method `fkalkhalidi' #<pinteresting::application:0x007f48fd2d6fc0> /tmp/build_deb19ff2fabe605365740a1f29b87f8b/config/environments/production.rb:80:in `block in <top (required)>' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/railties-4.1.7/lib/rails/railtie.rb:210:in `instance_eval' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/railties-4.1.7/lib/rails/railtie.rb:210:in `configure' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/config/environments/production.rb:1:in `<top (required)>' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.7/lib/active_support/dependencies.rb:247:in `require' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.7/lib/active_support/dependencies.rb:247:in `block in require' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.7/lib/active_support/dependencies.rb:232:in `load_dependency' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.7/lib/active_support/dependencies.rb:247:in `require' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/railties-4.1.7/lib/rails/engine.rb:594:in `block (2 levels) in <class:engine>' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/railties-4.1.7/lib/rails/engine.rb:593:in `each' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/railties-4.1.7/lib/rails/engine.rb:593:in `block in <class:engine>' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/railties-4.1.7/lib/rails/initializable.rb:30:in `instance_exec' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/railties-4.1.7/lib/rails/initializable.rb:30:in `run' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/railties-4.1.7/lib/rails/initializable.rb:55:in `block in run_initializers' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/railties-4.1.7/lib/rails/initializable.rb:44:in `each' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/railties-4.1.7/lib/rails/initializable.rb:44:in `tsort_each_child' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/railties-4.1.7/lib/rails/initializable.rb:54:in `run_initializers' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/railties-4.1.7/lib/rails/application.rb:300:in `initialize!' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/config/environment.rb:5:in `<top (required)>' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.7/lib/active_support/dependencies.rb:247:in `require' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.7/lib/active_support/dependencies.rb:247:in `block in require' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.7/lib/active_support/dependencies.rb:232:in `load_dependency' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.7/lib/active_support/dependencies.rb:247:in `require' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/railties-4.1.7/lib/rails/application.rb:276:in `require_environment!' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/railties-4.1.7/lib/rails/application.rb:389:in `block in run_tasks_blocks' /tmp/build_deb19ff2fabe605365740a1f29b87f8b/vendor/bundle/ruby/2.1.0/gems/sprockets-rails-2.2.0/lib/sprockets/rails/task.rb:64:in `block (2 levels) in define' tasks: top => environment (see total trace running task --trace) ! ! precompiling assets failed. ! ! force rejected, failed compile ruby app

appreciate help. first time learning ror.

what's within file config/environments/production.rb @ line 80?

search code, in production.rb file. it's there fkalkhalidi string somewhere causing error.

ruby-on-rails git heroku