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-rw-r--r--actionpack/lib/action_view/helpers/asset_tag_helper.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/actionpack/lib/action_view/helpers/asset_tag_helper.rb b/actionpack/lib/action_view/helpers/asset_tag_helper.rb
index 5dbba3c4a7..4ee7d7c9c9 100644
--- a/actionpack/lib/action_view/helpers/asset_tag_helper.rb
+++ b/actionpack/lib/action_view/helpers/asset_tag_helper.rb
@@ -358,7 +358,7 @@ module ActionView
src = options[:src] = path_to_image(source)
- unless src =~ /^cid:/
+ unless src =~ /^(?:cid|data):/
options[:alt] = options.fetch(:alt){ image_alt(src) }
end