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-rw-r--r--actionpack/lib/action_controller/vendor/html-scanner/html/sanitizer.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/actionpack/lib/action_controller/vendor/html-scanner/html/sanitizer.rb b/actionpack/lib/action_controller/vendor/html-scanner/html/sanitizer.rb
index 09dd08898c..91a97c02ff 100644
--- a/actionpack/lib/action_controller/vendor/html-scanner/html/sanitizer.rb
+++ b/actionpack/lib/action_controller/vendor/html-scanner/html/sanitizer.rb
@@ -33,7 +33,7 @@ module HTML
result = super
# strip any comments, and if they have a newline at the end (ie. line with
# only a comment) strip that too
- result.gsub!(/<!--(.*?)-->[\n]?/m, "") if result
+ result = result.gsub(/<!--(.*?)-->[\n]?/m, "") if (result && result =~ /<!--(.*?)-->[\n]?/m)
# Recurse - handle all dirty nested tags
result == text ? result : sanitize(result, options)
end