Minimal example for "Segmentation fault: 11" occurrence when passing around closures.

segfault_minimal_example.rs

use std::vec;

fn encrypt_decrypt_consistent_key() -> (@fn(&[u8]) -> ~[u8], @fn(&[u8]) -> ~[u8]) {
	let key = "random key".as_bytes().to_owned();

	(|bytes: &[u8]| {
		vec::append(bytes.to_owned(), key)
	}, |bytes: &[u8]| {
		// segfault: 11
		vec::append(bytes.to_owned(), key)
	})
}



fn main() {
	let (encrypt, decrypt) = encrypt_decrypt_consistent_key();
	let plaintext_bytes = "plaintext".as_bytes();
	let encrypted_bytes = encrypt(plaintext_bytes);


	// segfault: 11
	let decrypted_bytes = decrypt(encrypted_bytes);
}