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-rw-r--r--activesupport/lib/active_support/cache/file_store.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activesupport/lib/active_support/cache/file_store.rb b/activesupport/lib/active_support/cache/file_store.rb
index 9460532af0..b7712a4a15 100644
--- a/activesupport/lib/active_support/cache/file_store.rb
+++ b/activesupport/lib/active_support/cache/file_store.rb
@@ -143,7 +143,7 @@ module ActiveSupport
# Translate a file path into a key.
def file_path_key(path)
- fname = path[cache_path.size, path.size].split(File::SEPARATOR, 4).last
+ fname = path[cache_path.to_s.size..-1].split(File::SEPARATOR, 4).last
Rack::Utils.unescape(fname)
end