Correct line numbers from template errors. Closes #10937 [Aleksey Kondratenko]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8744 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/lib/action_view/template_handlers/compilable.rb

@@ -25,7 +25,7 @@ module ActionView
 
         begin
           file_name = 'compiled-template' if file_name.blank?
-          ActionView::Base::CompiledTemplates.module_eval(render_source, file_name, line_offset)
+          ActionView::Base::CompiledTemplates.module_eval(render_source, file_name, -line_offset)
         rescue Exception => e  # errors from template code
           if @view.logger
             @view.logger.debug "ERROR: compiling #{render_symbol} RAISED #{e}"

actionpack/test/controller/render_test.rb

@@ -86,6 +86,15 @@ class TestController < ActionController::Base
     render :xml => "<blah/>", :content_type => "application/atomsvc+xml"
   end
 
+  def render_line_offset
+    begin
+      render :inline => '<% raise %>', :locals => {:foo => 'bar'}
+    rescue => exc
+    end
+    line = exc.backtrace.first
+    render :text => line
+  end
+
   def heading
     head :ok
   end
@@ -225,6 +234,13 @@ class RenderTest < Test::Unit::TestCase
     assert_template "test/hello_world"
   end
 
+  def test_line_offset
+    get :render_line_offset
+    line = @response.body
+    assert(line =~ %r{:(\d+):})
+    assert_equal "1", $1
+  end
+
   def test_render_with_forward_slash
     get :render_hello_world_with_forward_slash
     assert_template "test/hello_world"