This example:
%img{:src=>"/images/admin/icons/accept.png", :alt =>
"", :valign=>"middle"}/
(The empty :alt => '' is the problem. It appears this happens with any
empty attribute.)
Produces this error:
can't convert nil into String
Stack trace:
/Library/Ruby/Gems/gems/haml-1.7.2/lib/haml/engine.rb:685:in `sort'
/Library/Ruby/Gems/gems/haml-1.7.2/lib/haml/engine.rb:685:in
`build_attributes'
/Library/Ruby/Gems/gems/haml-1.7.2/lib/haml/engine.rb:695:in
`prerender_tag'
/Library/Ruby/Gems/gems/haml-1.7.2/lib/haml/engine.rb:752:in
`render_tag'
/Library/Ruby/Gems/gems/haml-1.7.2/lib/haml/engine.rb:702:in `scan'
/Library/Ruby/Gems/gems/haml-1.7.2/lib/haml/engine.rb:702:in
`render_tag'
/Library/Ruby/Gems/gems/haml-1.7.2/lib/haml/engine.rb:312:in
`process_line'
/Library/Ruby/Gems/gems/haml-1.7.2/lib/haml/engine.rb:254:in
`do_precompile'
/Library/Ruby/Gems/gems/haml-1.7.2/lib/haml/engine.rb:433:in
`each_with_index'
/Library/Ruby/Gems/gems/haml-1.7.2/lib/haml/engine.rb:229:in `each'
/Library/Ruby/Gems/gems/haml-1.7.2/lib/haml/engine.rb:229:in
`each_with_index'
/Library/Ruby/Gems/gems/haml-1.7.2/lib/haml/engine.rb:229:in
`do_precompile'
/Library/Ruby/Gems/gems/haml-1.7.2/lib/haml/engine.rb:173:in
`initialize'
/Library/Ruby/Gems/gems/haml-1.7.2/lib/haml/template.rb:62:in `new'
/Library/Ruby/Gems/gems/haml-1.7.2/lib/haml/template.rb:62:in `render'
/Library/Ruby/Gems/gems/haml-1.7.2/lib/haml/template.rb:96:in
`render_template'
app/controllers/cart_controller.rb:7:in `index'
app/controllers/application.rb:40:in `set_time_zone'
/Library/Ruby/Gems/gems/haml-1.7.2/lib/sass/plugin/rails.rb:14:in
`process'
/Library/Ruby/Gems/gems/mongrel-1.1.1/lib/mongrel/rails.rb:76:in
`process'
/Library/Ruby/Gems/gems/mongrel-1.1.1/lib/mongrel/rails.rb:74:in
`synchronize'
/Library/Ruby/Gems/gems/mongrel-1.1.1/lib/mongrel/rails.rb:74:in
`process'
/Library/Ruby/Gems/gems/mongrel-1.1.1/lib/mongrel.rb:155:in
`process_client'
/Library/Ruby/Gems/gems/mongrel-1.1.1/lib/mongrel.rb:154:in `each'
/Library/Ruby/Gems/gems/mongrel-1.1.1/lib/mongrel.rb:154:in
`process_client'
/Library/Ruby/Gems/gems/mongrel-1.1.1/lib/mongrel.rb:281:in `run'
/Library/Ruby/Gems/gems/mongrel-1.1.1/lib/mongrel.rb:281:in
`initialize'
/Library/Ruby/Gems/gems/mongrel-1.1.1/lib/mongrel.rb:281:in `new'
/Library/Ruby/Gems/gems/mongrel-1.1.1/lib/mongrel.rb:281:in `run'
/Library/Ruby/Gems/gems/mongrel-1.1.1/lib/mongrel.rb:264:in
`initialize'
/Library/Ruby/Gems/gems/mongrel-1.1.1/lib/mongrel.rb:264:in `new'
/Library/Ruby/Gems/gems/mongrel-1.1.1/lib/mongrel.rb:264:in `run'
/Library/Ruby/Gems/gems/mongrel-1.1.1/lib/mongrel/configurator.rb:
282:in `run'
/Library/Ruby/Gems/gems/mongrel-1.1.1/lib/mongrel/configurator.rb:
281:in `each'
/Library/Ruby/Gems/gems/mongrel-1.1.1/lib/mongrel/configurator.rb:
281:in `run'
/Library/Ruby/Gems/gems/mongrel-1.0.3/bin/mongrel_rails:122:in `run'
/Library/Ruby/Gems/gems/mongrel-1.1.1/lib/mongrel/command.rb:212:in
`run'
/Library/Ruby/Gems/gems/mongrel-1.0.3/bin/mongrel_rails:276
To be sure I also tested it with the haml binary outside of Rails and
the same error is produced. My apologies if this is specific to my
setup - it doesn't appear to be though.
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