我正在运行Sass，Compass和Susy。我升级到最新版本：
bigdecimal (1.2.4)
chunky_png (1.3.3)
compass (1.0.3)
compass-core (1.0.3)
compass-import-once (1.0.5)
ffi (1.9.6 x86-mingw32)
io-console (0.4.2)
json (1.8.1)
minitest (4.7.5)
multi_json (1.10.1)
psych (2.0.5)
rake (10.1.0)
rb-fsevent (0.9.4)
rb-inotify (0.9.5)
rdoc (4.1.0)
sass (3.4.10)
susy (2.2.1)
test-unit (2.1.5.0)
完全弃用警告是：
DEPRECATION WARNING: Passing null, a non-string value, to unquote()
will be an error in future versions of Sass.
我跑了“指南针编译 - 跟踪”，但它没有添加任何额外的信息。有谁知道如何找到问题所在。根据我的理解，它可能是Compass或Susy。请指教。
答案 0 :(得分：1)
似乎问题在于Compass。接下来是我的调查让我得出结论。我在Sass安装中搜索了这个警告的位置（在我的例子中是“C：\ Ruby21 \ lib \ ruby \ gems \ 2.1.0 \ gems \ sass-3.4.10 \ lib \ sass”）。它是“.. \ scripts \ functions.rb”：
def unquote(string)
unless string.is_a?(Sass::Script::Value::String)
Sass::Util.sass_warn(<<MESSAGE)
DEPRECATION WARNING: Passing #{string.to_sass}, a non-string value, to unquote()
will be an error in future versions of Sass.
MESSAGE
return string
end
return string if string.type == :identifier
identifier(string.value)
end
declare :unquote, [:string]
我在“除非”中放置一个“put caller”，看看谁在没有参数的情况下调用此函数，这是输出：
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/script/tree/funcall.rb:140:in `_perform'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/script/tree/node.rb:50:in `perform'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:468:in `visit_variable'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:36:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `block in with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `block (4 levels) in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `map'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `block (3 levels) in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:179:in `with_environment'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `block (2 levels) in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:84:in `perform_arguments'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:358:in `block in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:98:in `block in with_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:98:in `with_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:346:in `visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:36:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `block in with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:299:in `block (2 levels) in visit_if'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:299:in `map'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:299:in `block in visit_if'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:179:in `with_environment'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:298:in `visit_if'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:36:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `block in with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `block (4 levels) in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `map'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `block (3 levels) in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:179:in `with_environment'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `block (2 levels) in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:84:in `perform_arguments'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:358:in `block in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:98:in `block in with_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:98:in `with_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:346:in `visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:36:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `block in with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:299:in `block (2 levels) in visit_if'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:299:in `map'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:299:in `block in visit_if'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:179:in `with_environment'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:298:in `visit_if'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:36:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `block in with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:302:in `visit_if'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:36:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `block in with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:302:in `visit_if'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:36:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `block in with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:302:in `visit_if'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:36:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `block in with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:302:in `visit_if'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:36:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `block in with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `block (4 levels) in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `map'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `block (3 levels) in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:179:in `with_environment'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `block (2 levels) in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:84:in `perform_arguments'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:358:in `block in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:98:in `block in with_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:98:in `with_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:346:in `visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:36:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `block in with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:240:in `block (3 levels) in visit_each'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:240:in `map'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:240:in `block (2 levels) in visit_each'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:232:in `map'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:232:in `block in visit_each'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:179:in `with_environment'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:231:in `visit_each'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:36:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `block in with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `block (4 levels) in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `map'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `block (3 levels) in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:179:in `with_environment'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `block (2 levels) in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:84:in `perform_arguments'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:358:in `block in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:98:in `block in with_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:98:in `with_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:346:in `visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:36:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `block in with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `block (4 levels) in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `map'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `block (3 levels) in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:179:in `with_environment'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:363:in `block (2 levels) in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:84:in `perform_arguments'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:358:in `block in visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:98:in `block in with_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:98:in `with_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:346:in `visit_mixin'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:36:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `block in with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:430:in `block (2 levels) in visit_rule'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:430:in `map'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:430:in `block in visit_rule'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:179:in `with_environment'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:428:in `visit_rule'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:36:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `block in with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:325:in `block (2 levels) in visit_import'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:325:in `map'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:325:in `block in visit_import'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:88:in `block in with_import'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:88:in `with_import'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:322:in `visit_import'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:36:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `block in with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:115:in `with_frame'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/stack.rb:79:in `with_base'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:158:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:52:in `block in visit_children'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:52:in `map'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:52:in `visit_children'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:167:in `block in visit_children'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:179:in `with_environment'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:166:in `visit_children'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:36:in `block in visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:186:in `visit_root'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/base.rb:36:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:157:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/visitors/perform.rb:8:in `visit'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/root_node.rb:36:in `css_tree'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/tree/root_node.rb:20:in `render'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/engine.rb:268:in `render'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/plugin/compiler.rb:492:in `update_stylesheet'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/plugin/compiler.rb:215:in `block in update_stylesheets'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/plugin/compiler.rb:209:in `each'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/sass-3.4.10/lib/sass/plugin/compiler.rb:209:in `update_stylesheets'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/compass-1.0.3/lib/compass/sass_compiler.rb:40:in `compile!'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/compass-1.0.3/lib/compass/commands/update_project.rb:49:in `perform'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/compass-1.0.3/lib/compass/commands/base.rb:18:in `execute'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/compass-1.0.3/lib/compass/commands/project_base.rb:19:in `execute'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/compass-1.0.3/lib/compass/exec/sub_command_ui.rb:43:in `perform!'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/compass-1.0.3/lib/compass/exec/sub_command_ui.rb:15:in `run!'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/compass-1.0.3/bin/compass:30:in `block in <top (required)>'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/compass-1.0.3/bin/compass:44:in `call'
C:/Ruby21/lib/ruby/gems/2.1.0/gems/compass-1.0.3/bin/compass:44:in `<top (required)>'
C:/Ruby21/bin/compass:23:in `load'
C:/Ruby21/bin/compass:23:in `<main>'
DEPRECATION WARNING: Passing null, a non-string value, to unquote()
will be an error in future versions of Sass.
正如你可以看到这个堆栈跟踪的底部Compass正在做的事情，它调用Sass。我要用Compass提交这个问题。
仅供参考：我将错误发布到Compass错误跟踪https://github.com/Compass/compass/issues/1924。
答案 1 :(得分：1)
如this thread中所述，它确实是一个指南针问题，与其盒装尺寸混合有关。您将在该页面上找到可能的解决方案。我在这里复制它们：
解决方案1（我已经测试过，警告消失了）：
添加您自己的自定义mixin，它将覆盖Compass mixin：
@mixin box-sizing($value) {
-moz-box-sizing: $value;
box-sizing: $value;
}
解决方案2：
@mixin box-sizing($box-model: $default-box-sizing) {
@if type-of($box-model) == string {
$box-model: unquote($box-model);
}
@include prefixed-properties(css3-boxsizing, $box-sizing-support-threshold, (box-sizing: $box-model));
}
答案 2 :(得分：1)
你可以创建一个安全版本的unquote，所以除非它真的是一个字符串，否则不会被调用：
@function safe-unquote($param) {
@return if(type-of($param) == string, unquote($param), $param);
}