Hacker News on 19 May 2017

• Sweden drops Julian Assange rape investigation
• 42-inch yacht still hoping to become the smallest boat to cross the Atlantic
• Ask HN: How can I do social good through programming?
• Writing correct lock-free and distributed stateful systems in Rust, with TLA+
• WannaCry in-memory key recovery for Windows XP
• Let's Encrypt is down
• Americans Are Paying $38 to Collect $1 of Student Debt
• Adding a new Bytecode instruction to the .NET runtime
• Bootsnap: Optimizing Ruby App Boot Time
• Hacker News Readers as Progressive Web Apps