对rails很新，我无法确定或找到确切问题的位置。
RAILS_ENV =生产包exec rake资产：预编译
耙子流产了！
ExecJS :: RuntimeError：SyntaxError：无效的正则表达式：字符类中的范围乱序
获得@（execjs）：3538：630
（execjs）：4058：47
（execjs）：1：46
全球代码@（execjs）：1：58
/Users/al/.rbenv/versions/2.4.1/bin/bundle:22:in load'
/Users/al/.rbenv/versions/2.4.1/bin/bundle:22:in＆＃39;
任务：TOP =＆gt;资产：预编译
（通过使用--trace运行任务查看完整跟踪）
以下是完整的--trace：
voke资产：预编译（first_time）
**调用资产：环境（first_time）
**执行资产：环境
**调用环境（first_time）
**执行环境
**执行资产：预编译
耙子流产了！
NoMethodError：未定义的方法[]' for nil:NilClass
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/sass_processor.rb:278:in sprockets_context＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/sass_processor.rb:124:in asset_path'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/sass_processor.rb:137:in asset_url＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/sass_processor.rb:209:in font_url'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/script/tree/funcall.rb:143:in _执行＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/script/tree/node.rb:58:in {{1 }} visit_prop＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/base.rb:36:in {{1阻止访问＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/stack.rb:79:in perform'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/perform.rb:397:in with_frame＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/stack.rb:79:in visit'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/perform.rb:160:in访问＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/perform.rb:504:in {{1 }}映射＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/perform.rb:504:in {{1 }} with_environment＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/perform.rb:503:in {{1 }}访问＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/perform.rb:160:in {{1阻止在with_base＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/stack.rb:115:in block in with_base'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/stack.rb:115:in with_base＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/perform.rb:160:in {{1在visit_children＆＃39;中阻止
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/base.rb:52:in {{1 }} visit_children＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/perform.rb:169:in {{1 }} with_environment＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/perform.rb:168:in {{1阻止访问＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/perform.rb:188:in {{1 }}访问＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/perform.rb:159:in {{1 }}访问＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/root_node.rb:36:in with_base'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/perform.rb:160:in渲染＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/engine.rb:281:in block (2 levels) in visit_directive'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/perform.rb:504:in来电＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/sass_compressor.rb:28:in block in visit_directive'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/perform.rb:181:in call_processor＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:57:in visit_directive'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/base.rb:36:in reverse_each＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:56:in block in visit'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/stack.rb:79:in load_from_unloaded＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/loader.rb:60:in with_frame'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/stack.rb:79:in fetch_asset_from_dependency_cache＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/loader.rb:44:in visit'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/base.rb:52:in阻止初始化＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/cached_environment.rb:47:in map'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/base.rb:52:in find_asset＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/base.rb:73:in block in visit_children'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/perform.rb:181:in阻止发现＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:114:in visit_children'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/base.rb:36:in阻止stat_tree＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:212:in visit_root'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/base.rb:36:in每个＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:209:in visit'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/visitors/perform.rb:8:in stat_tree＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:105:in css_tree'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sass-3.4.23/lib/sass/tree/root_node.rb:20:in阻止logical_paths＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:104:in render'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/sass_compressor.rb:48:in logical_paths＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/manifest.rb:140:in call'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:75:in编译＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-rails-3.2.0/lib/sprockets/rails/task.rb:68:in {{1 }} with_logger＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-rails-3.2.0/lib/sprockets/rails/task.rb:67:in {{1阻止执行＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/rake-12.0.0/lib/rake/task.rb:250:in block in call_processors'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:56:in执行＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/rake-12.0.0/lib/rake/task.rb:194:in call_processors'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/loader.rb:134:in mon_synchronize＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/rake-12.0.0/lib/rake/task.rb:187:in block in load'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/loader.rb:317:in调用＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/rake-12.0.0/lib/rake/application.rb:152:in load'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/cached_environment.rb:20:in块（ top_level中的2个级别＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/rake-12.0.0/lib/rake/application.rb:108:in load'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/base.rb:66:in阻止TOP_LEVEL＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/rake-12.0.0/lib/rake/application.rb:117:in find_all_linked_assets'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/manifest.rb:142:in top_level＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/rake-12.0.0/lib/rake/application.rb:80:in block (2 levels) in logical_paths'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:228:in standard_exception_handling＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/rake-12.0.0/lib/rake/application.rb:77:in block in stat_directory'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:209:in＆＃ 39;
/Users/al/.rbenv/versions/2.4.1/bin/rake:22:in stat_directory'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:227:in＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/bundler-1.14.6/lib/bundler/cli/exec.rb:74:in each'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:105:in kernel_load＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/bundler-1.14.6/lib/bundler/cli/exec.rb:27:in each'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:104:in EXEC＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/bundler-1.14.6/lib/bundler/vendor/thor/lib/thor/command.rb:27：在find'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/sprockets/manifest.rb:185:in invoke_command＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/bundler-1.14.6/lib/bundler/vendor/thor/lib/thor.rb:359:in { {1}}调度＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/bundler-1.14.6/lib/bundler/vendor/thor/lib/thor/base.rb:440：在block (3 levels) in define'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sprockets-3.7.1/lib/rake/sprocketstask.rb:147:in开始＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/bundler-1.14.6/exe/bundle:32:in block (2 levels) in define'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/rake-12.0.0/lib/rake/task.rb:250:in with_friendly_errors＆＃39;
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/bundler-1.14.6/exe/bundle:24:in each'
/Users/al/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/rake-12.0.0/lib/rake/task.rb:250:in load＆＃39;
/Users/al/.rbenv/versions/2.4.1/bin/bundle:22:in`'
任务：TOP =＆gt;资产：预编译