mthaml非法嵌套：在回声中嵌套是非法的

Question

我需要执行以下haml

  = form_open('login', array('method' => 'POST'))
    %p
      %label{:for => "password"} Password
      = form_input($login_password)
    %p
      %input{:name => "submit", :type => "submit", :value => "Login"}
  = form_close()

但我一直在

with message 'Illegal nesting: nesting within echo is illegal in 

我理解错误并且它是嵌套但我该如何解决？它与其他名为phamlp的php库

一起工作正常