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• 04:55, 22 November 2025 PC talk contribs created page Rust’s RefCell and Interior Mutability: The Feature That Broke My Brain (Then Fixed My Design) (Created page with "500px I’ll be honest:
The first time I saw a RefCell in Rust, I closed the tab. It felt like a betrayal. 
Rust was supposed to be safe, predictable, immutable by default. And now this thing — this box of interior mutability — was promising to mutate data behind an immutable reference. My brain screamed: “Isn’t that literally what Rust was built to prevent?” But then… it clicked. 
And that...")