◆ErrorOracle
rust

thread 'main' panicked at 'called `Option::unwrap()` on a `…

Error message

thread 'main' panicked at 'called `Option::unwrap()` on a `None` value'

What broke

The program attempted to retrieve a value from an Option type using `unwrap()`, but the Option was None. This caused the program to panic and terminate unexpectedly.

Why it broke

This happened because the code assumed that the Option would always contain a value, but in this case, it did not. Using `unwrap()` on a None value is unsafe and leads to a runtime error.

How to fix

To fix this, you should check if the Option is Some before unwrapping it. You can use pattern matching or methods like `unwrap_or`, `unwrap_or_else`, or `expect` to handle the None case gracefully.

Code fix

let value = option_value.unwrap_or(default_value);

Explained by ErrorOracle

Prevention tip

You can use pattern matching or methods like `unwrap_or`, `unwrap_or_else`, or `expect` to handle the None case gracefully.

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