diff options
Diffstat (limited to 'activesupport/lib/active_support/file_update_checker.rb')
| -rw-r--r-- | activesupport/lib/active_support/file_update_checker.rb | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/file_update_checker.rb b/activesupport/lib/active_support/file_update_checker.rb index 2dbbfadac1..2b5e3c1350 100644 --- a/activesupport/lib/active_support/file_update_checker.rb +++ b/activesupport/lib/active_support/file_update_checker.rb @@ -38,6 +38,10 @@ module ActiveSupport # changes. The array of files and list of directories cannot be changed # after FileUpdateChecker has been initialized. def initialize(files, dirs = {}, &block) + unless block + raise ArgumentError, "A block is required to initialize a FileUpdateChecker" + end + @files = files.freeze @glob = compile_glob(dirs) @block = block |