Tighten rescue clauses. Closes #5985.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4885 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Tighten rescue clauses.  #5985 [james@grayproductions.net]
+
 * Fix send_data documentation typo.  #5982 [brad@madriska.com]
 
 * Switch to using FormEncodedPairParser for parsing request parameters. [Nicholas Seckar, DHH]

actionpack/lib/action_controller/caching.rb

@@ -487,7 +487,7 @@ module ActionController #:nodoc:
             if f =~ matcher
               begin
                 File.delete(f)
-              rescue Object => e
+              rescue SystemCallError => e
                 # If there's no cache, then there's nothing to complain about
               end
             end

actionpack/lib/action_controller/cgi_ext/cgi_methods.rb

@@ -55,7 +55,7 @@ class CGIMethods #:nodoc:
           node = XmlNode.from_xml(raw_post_data)
           { node.node_name => node }
       end
-    rescue Object => e
+    rescue Exception => e # YAML, XML or Ruby code block errors
       { "exception" => "#{e.message} (#{e.class})", "backtrace" => e.backtrace, 
         "raw_post_data" => raw_post_data, "format" => mime_type }
     end

actionpack/lib/action_controller/dependencies.rb

@@ -71,7 +71,7 @@ module ActionController #:nodoc:
               require_dependency(dependency.to_s)
             rescue LoadError => e
               raise LoadError.new("Missing #{layer} #{dependency}.rb").copy_blame!(e)
-            rescue Object => exception
+            rescue Exception => exception  # error from loaded file
               exception.blame_file! "=> #{layer} #{dependency}.rb"
               raise
             end

actionpack/lib/action_controller/rescue.rb

@@ -78,7 +78,7 @@ module ActionController #:nodoc:
       def perform_action_with_rescue #:nodoc:
         begin
           perform_action_without_rescue
-        rescue Object => exception
+        rescue Exception => exception  # errors from action performed
           if defined?(Breakpoint) && params["BP-RETRY"]
             msg = exception.backtrace.first
             if md = /^(.+?):(\d+)(?::in `(.+)')?$/.match(msg) then

actionpack/lib/action_view/base.rb

@@ -510,7 +510,7 @@ module ActionView #:nodoc:
           else
             CompiledTemplates.module_eval(render_source, 'compiled-template', -line_offset)
           end
-        rescue Object => e
+        rescue Exception => e  # errors from template code
           if logger
             logger.debug "ERROR: compiling #{render_symbol} RAISED #{e}"
             logger.debug "Function body: #{render_source}"

actionpack/lib/action_view/compiled_templates.rb

@@ -55,7 +55,7 @@ module ActionView
       begin
         module_eval(method_def, fake_file_name, initial_line_number)
         @mtimes[full_key(identifier, arg_names)] = Time.now
-      rescue Object => e
+      rescue Exception => e  # errors from compiled source
         e.blame_file! identifier
         raise
       end

actionpack/lib/action_view/helpers/debug_helper.rb

@@ -7,7 +7,7 @@ module ActionView
         begin
           Marshal::dump(object)
           "<pre class='debug_dump'>#{h(object.to_yaml).gsub("  ", "&nbsp; ")}</pre>"
-        rescue Object => e
+        rescue Exception => e  # errors from Marshal or YAML
           # Object couldn't be dumped, perhaps because of singleton methods -- this is the fallback
           "<code class='debug_dump'>#{h(object.inspect)}</code>"
         end

actionpack/test/active_record_unit.rb

@@ -17,12 +17,12 @@ else
   $stderr.print 'Attempting to load Active Record... '
   begin
     PATH_TO_AR = "#{File.dirname(__FILE__)}/../../activerecord/lib"
-    raise "#{PATH_TO_AR} doesn't exist" unless File.directory?(PATH_TO_AR)
+    raise LoadError, "#{PATH_TO_AR} doesn't exist" unless File.directory?(PATH_TO_AR)
     $LOAD_PATH.unshift PATH_TO_AR
     require 'active_record'
     require 'active_record/fixtures'
     $stderr.puts 'success'
-  rescue Object => e
+  rescue LoadError => e
     $stderr.print "failed. Skipping Active Record assertion tests: #{e}"
     ActiveRecordTestConnector.able_to_connect = false
   end
@@ -41,7 +41,7 @@ class ActiveRecordTestConnector
         require_fixture_models
         self.connected = true
       end
-    rescue Object => e
+    rescue Exception => e  # errors from ActiveRecord setup
       $stderr.puts "\nSkipping ActiveRecord assertion tests: #{e}"
       #$stderr.puts "  #{e.backtrace.join("\n  ")}\n"
       self.able_to_connect = false
@@ -56,7 +56,7 @@ class ActiveRecordTestConnector
           ActiveRecord::Base.establish_connection(connection_options)
           ActiveRecord::Base.configurations = { 'sqlite3_ar_integration' => connection_options } 
           ActiveRecord::Base.connection
-        rescue Object
+        rescue Exception  # errors from establishing a connection
           $stderr.puts 'SQLite 3 unavailable; falling to SQLite 2.'
           connection_options = {:adapter => 'sqlite', :dbfile => ':memory:'}
           ActiveRecord::Base.establish_connection(connection_options)