Quick article for LESSdicteds like me. If you use Boostrap and you like WinLess for his autocompile ability, you’ll problably already seen this error message: ‘eval’ is null or not an object

Do not panic my friend! It’ll be fixed in 1 minute!

Open you mixins.less and add display:block; to the .ie7-inline-block()  class.

And after you save you friend WinLess will compile successfully.

Easy as expected. Now go back coding!