[INFO] updating cached repository ralphrecto/cryptopals
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ralphrecto/cryptopals
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ralphrecto/cryptopals" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/ralphrecto/cryptopals"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/ralphrecto/cryptopals'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ralphrecto/cryptopals" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/ralphrecto/cryptopals"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/ralphrecto/cryptopals'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d7cbc0047cb21347cf2782df798aa72494d5ee01
[INFO] sha for GitHub repo ralphrecto/cryptopals: d7cbc0047cb21347cf2782df798aa72494d5ee01
[INFO] validating manifest of ralphrecto/cryptopals on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ralphrecto/cryptopals on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ralphrecto/cryptopals
[INFO] finished frobbing ralphrecto/cryptopals
[INFO] frobbed toml for ralphrecto/cryptopals written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/ralphrecto/cryptopals/Cargo.toml
[INFO] started frobbing ralphrecto/cryptopals
[INFO] finished frobbing ralphrecto/cryptopals
[INFO] frobbed toml for ralphrecto/cryptopals written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/ralphrecto/cryptopals/Cargo.toml
[INFO] crate ralphrecto/cryptopals already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking ralphrecto/cryptopals against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-3/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/ralphrecto/cryptopals:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 9bb82b80feba1a6017a68f48b28799b62f93c121a0d7671e6a77cf4d6b94f6c9
[INFO] running `"docker" "start" "-a" "9bb82b80feba1a6017a68f48b28799b62f93c121a0d7671e6a77cf4d6b94f6c9"`
[INFO] [stderr]     Checking base64 v0.7.0
[INFO] [stderr]     Checking cryptopals v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `cryptopals::strutils`
[INFO] [stderr]  --> src/cryptopals/set1.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use cryptopals::strutils;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> src/cryptopals/hexutils.rs:16:10
[INFO] [stderr]    |
[INFO] [stderr] 16 |         0...9 => (0x30 + b) as char,
[INFO] [stderr]    |          ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/cryptopals/hexutils.rs:65:14
[INFO] [stderr]    |
[INFO] [stderr] 65 |     for i in (0..8) {
[INFO] [stderr]    |              ^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ascii::AsciiExt`
[INFO] [stderr]  --> src/cryptopals/freq_analysis.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::ascii::AsciiExt;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::ascii::AsciiExt': use inherent methods instead
[INFO] [stderr]  --> src/cryptopals/freq_analysis.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::ascii::AsciiExt;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `cryptopals::strutils`
[INFO] [stderr]  --> src/cryptopals/set1.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use cryptopals::strutils;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> src/cryptopals/hexutils.rs:16:10
[INFO] [stderr]    |
[INFO] [stderr] 16 |         0...9 => (0x30 + b) as char,
[INFO] [stderr]    |          ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/cryptopals/hexutils.rs:65:14
[INFO] [stderr]    |
[INFO] [stderr] 65 |     for i in (0..8) {
[INFO] [stderr]    |              ^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ascii::AsciiExt`
[INFO] [stderr]  --> src/cryptopals/freq_analysis.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::ascii::AsciiExt;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::ascii::AsciiExt': use inherent methods instead
[INFO] [stderr]  --> src/cryptopals/freq_analysis.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::ascii::AsciiExt;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v1`
[INFO] [stderr]   --> src/cryptopals/set1.rs:65:9
[INFO] [stderr]    |
[INFO] [stderr] 65 |     let v1: Vec<u8> = hexutils::str_to_bytevec("this is a test");
[INFO] [stderr]    |         ^^ help: consider prefixing with an underscore: `_v1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v2`
[INFO] [stderr]   --> src/cryptopals/set1.rs:66:9
[INFO] [stderr]    |
[INFO] [stderr] 66 |     let v2: Vec<u8> = hexutils::str_to_bytevec("wokka wokka!!!");
[INFO] [stderr]    |         ^^ help: consider prefixing with an underscore: `_v2`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `challenge1`
[INFO] [stderr]  --> src/cryptopals/set1.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn challenge1() -> () {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `challenge2`
[INFO] [stderr]   --> src/cryptopals/set1.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn challenge2() -> () {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `chi_square_printer`
[INFO] [stderr]   --> src/cryptopals/set1.rs:28:1
[INFO] [stderr]    |
[INFO] [stderr] 28 | fn chi_square_printer(word: &str, keyword_and_keys: &Vec<(String, u8)>) -> () {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `challenge3`
[INFO] [stderr]   --> src/cryptopals/set1.rs:39:1
[INFO] [stderr]    |
[INFO] [stderr] 39 | pub fn challenge3() -> () {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `challenge4`
[INFO] [stderr]   --> src/cryptopals/set1.rs:45:1
[INFO] [stderr]    |
[INFO] [stderr] 45 | pub fn challenge4() -> () {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `challenge5`
[INFO] [stderr]   --> src/cryptopals/set1.rs:55:1
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub fn challenge5() -> () {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hex_to_nibble`
[INFO] [stderr]  --> src/cryptopals/hexutils.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn hex_to_nibble(s: char) -> u8 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `nibble_to_hex`
[INFO] [stderr]   --> src/cryptopals/hexutils.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn nibble_to_hex(b: u8) -> char {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hexstr_to_bytevec`
[INFO] [stderr]   --> src/cryptopals/hexutils.rs:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | pub fn hexstr_to_bytevec(s: &str) -> Vec<u8> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `bytevec_to_hexstr`
[INFO] [stderr]   --> src/cryptopals/hexutils.rs:52:1
[INFO] [stderr]    |
[INFO] [stderr] 52 | pub fn bytevec_to_hexstr(v: &Vec<u8>) -> String {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `count_set_bits`
[INFO] [stderr]   --> src/cryptopals/hexutils.rs:62:1
[INFO] [stderr]    |
[INFO] [stderr] 62 | pub fn count_set_bits(v: u8) -> u8 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `letter_freq`
[INFO] [stderr]  --> src/cryptopals/freq_analysis.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | fn letter_freq(c: char) -> Option<f64> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `chi_square`
[INFO] [stderr]   --> src/cryptopals/freq_analysis.rs:46:1
[INFO] [stderr]    |
[INFO] [stderr] 46 | pub fn chi_square(text: &str) -> Option<f64> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_file`
[INFO] [stderr]  --> src/cryptopals/fileutils.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn read_file(pathstr: &str) -> io::Result<String> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_lines`
[INFO] [stderr]   --> src/cryptopals/fileutils.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn read_lines(pathstr: &str) -> io::Result<Vec<String>> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `bytexor_keygen`
[INFO] [stderr]  --> src/cryptopals/xorutils.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn bytexor_keygen(s: &str) -> Vec<(String, u8)> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `rolling_xor`
[INFO] [stderr]   --> src/cryptopals/xorutils.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn rolling_xor(v: &Vec<u8>, key: &Vec<u8>) -> Vec<u8> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hamming_dist`
[INFO] [stderr]  --> src/cryptopals/strutils.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn hamming_dist(v1: &Vec<u8>, v2: &Vec<u8>) -> u32 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v1`
[INFO] [stderr]   --> src/cryptopals/set1.rs:65:9
[INFO] [stderr]    |
[INFO] [stderr] 65 |     let v1: Vec<u8> = hexutils::str_to_bytevec("this is a test");
[INFO] [stderr]    |         ^^ help: consider prefixing with an underscore: `_v1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v2`
[INFO] [stderr]   --> src/cryptopals/set1.rs:66:9
[INFO] [stderr]    |
[INFO] [stderr] 66 |     let v2: Vec<u8> = hexutils::str_to_bytevec("wokka wokka!!!");
[INFO] [stderr]    |         ^^ help: consider prefixing with an underscore: `_v2`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `challenge1`
[INFO] [stderr]  --> src/cryptopals/set1.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn challenge1() -> () {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `challenge2`
[INFO] [stderr]   --> src/cryptopals/set1.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn challenge2() -> () {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `chi_square_printer`
[INFO] [stderr]   --> src/cryptopals/set1.rs:28:1
[INFO] [stderr]    |
[INFO] [stderr] 28 | fn chi_square_printer(word: &str, keyword_and_keys: &Vec<(String, u8)>) -> () {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `challenge3`
[INFO] [stderr]   --> src/cryptopals/set1.rs:39:1
[INFO] [stderr]    |
[INFO] [stderr] 39 | pub fn challenge3() -> () {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `challenge4`
[INFO] [stderr]   --> src/cryptopals/set1.rs:45:1
[INFO] [stderr]    |
[INFO] [stderr] 45 | pub fn challenge4() -> () {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `challenge5`
[INFO] [stderr]   --> src/cryptopals/set1.rs:55:1
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub fn challenge5() -> () {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hex_to_nibble`
[INFO] [stderr]  --> src/cryptopals/hexutils.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn hex_to_nibble(s: char) -> u8 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `nibble_to_hex`
[INFO] [stderr]   --> src/cryptopals/hexutils.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn nibble_to_hex(b: u8) -> char {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hexstr_to_bytevec`
[INFO] [stderr]   --> src/cryptopals/hexutils.rs:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | pub fn hexstr_to_bytevec(s: &str) -> Vec<u8> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `bytevec_to_hexstr`
[INFO] [stderr]   --> src/cryptopals/hexutils.rs:52:1
[INFO] [stderr]    |
[INFO] [stderr] 52 | pub fn bytevec_to_hexstr(v: &Vec<u8>) -> String {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `count_set_bits`
[INFO] [stderr]   --> src/cryptopals/hexutils.rs:62:1
[INFO] [stderr]    |
[INFO] [stderr] 62 | pub fn count_set_bits(v: u8) -> u8 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `letter_freq`
[INFO] [stderr]  --> src/cryptopals/freq_analysis.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | fn letter_freq(c: char) -> Option<f64> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `chi_square`
[INFO] [stderr]   --> src/cryptopals/freq_analysis.rs:46:1
[INFO] [stderr]    |
[INFO] [stderr] 46 | pub fn chi_square(text: &str) -> Option<f64> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_file`
[INFO] [stderr]  --> src/cryptopals/fileutils.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn read_file(pathstr: &str) -> io::Result<String> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_lines`
[INFO] [stderr]   --> src/cryptopals/fileutils.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn read_lines(pathstr: &str) -> io::Result<Vec<String>> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `bytexor_keygen`
[INFO] [stderr]  --> src/cryptopals/xorutils.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn bytexor_keygen(s: &str) -> Vec<(String, u8)> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `rolling_xor`
[INFO] [stderr]   --> src/cryptopals/xorutils.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn rolling_xor(v: &Vec<u8>, key: &Vec<u8>) -> Vec<u8> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hamming_dist`
[INFO] [stderr]  --> src/cryptopals/strutils.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn hamming_dist(v1: &Vec<u8>, v2: &Vec<u8>) -> u32 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `"docker" "inspect" "9bb82b80feba1a6017a68f48b28799b62f93c121a0d7671e6a77cf4d6b94f6c9"`
[INFO] running `"docker" "rm" "-f" "9bb82b80feba1a6017a68f48b28799b62f93c121a0d7671e6a77cf4d6b94f6c9"`
[INFO] [stdout] 9bb82b80feba1a6017a68f48b28799b62f93c121a0d7671e6a77cf4d6b94f6c9