Handle variants when the same class appears multiple times in a selector #10397
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Given the utility
.foo.fooand the candidatehover:foo, we would replace both instances of.foowith the exact same node representinghover:foo. Inpostcss-selector-parsernodes effectively have identity. This meant that it would see the node at position 1 and then again at position 2 causing in an infinite loop that was allocating memory and resulted in a crash. So we clone theformatAstnodes before inserting them which results in the correct selector.hover\:foo:hover.hover\:foo:hoverFixes #10355