Ruby 2.7.3 introduced a new bug with Resolv::DNS, which we heavily use within Mastodon: https://bugs.ruby-lang.org/issues/17781 Ruby 2.7.3 also included security fixes for two CVEs, but those do not seem to apply to Mastodon: https://github.com/tootsuite/mastodon/pull/16004#issuecomment-815125025
		
			
				
	
	
	
		
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