[INFO] cloning repository https://github.com/bantic/cryptopals
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bantic/cryptopals" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbantic%2Fcryptopals", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbantic%2Fcryptopals'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f0958d66e32c4ca18ace0e3c208066514b769e6c
[INFO] testing bantic/cryptopals against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbantic%2Fcryptopals" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bantic/cryptopals on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bantic/cryptopals
[INFO] finished tweaking git repo https://github.com/bantic/cryptopals
[INFO] tweaked toml for git repo https://github.com/bantic/cryptopals written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/bantic/cryptopals already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd7fe86d860d2b9b6840a0ec9f4fdd9917b16ae8cdcf6ac17a41efaf63c8c243
[INFO] running `Command { std: "docker" "start" "-a" "fd7fe86d860d2b9b6840a0ec9f4fdd9917b16ae8cdcf6ac17a41efaf63c8c243", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd7fe86d860d2b9b6840a0ec9f4fdd9917b16ae8cdcf6ac17a41efaf63c8c243", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd7fe86d860d2b9b6840a0ec9f4fdd9917b16ae8cdcf6ac17a41efaf63c8c243", kill_on_drop: false }`
[INFO] [stdout] fd7fe86d860d2b9b6840a0ec9f4fdd9917b16ae8cdcf6ac17a41efaf63c8c243
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3eed91bc7d6ea89a2850a54d3e36fc1d9c398063f0080fcd83a25ab2a6f96be0
[INFO] running `Command { std: "docker" "start" "-a" "3eed91bc7d6ea89a2850a54d3e36fc1d9c398063f0080fcd83a25ab2a6f96be0", kill_on_drop: false }`
[INFO] [stderr]    Compiling cryptopals v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/crypto/xor.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     if (score > best_score) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `letter_counts` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/crypto/xor.rs:76:7
[INFO] [stdout]    |
[INFO] [stdout] 75 |       let v = letter_counts.get(&c).unwrap();
[INFO] [stdout]    |               ------------- immutable borrow occurs here
[INFO] [stdout] 76 |       letter_counts.insert(c, v + 1);
[INFO] [stdout]    |       ^^^^^^^^^^^^^           - immutable borrow later used here
[INFO] [stdout]    |       |
[INFO] [stdout]    |       mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hex_to_base64`
[INFO] [stdout]  --> src/crypto/hex_to_base64.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn hex_to_base64(hex: &str) -> String {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `pad_bits`
[INFO] [stdout]   --> src/crypto/hex_to_base64.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn pad_bits(bits: Vec<bool>) -> Vec<bool> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `bits_to_base64`
[INFO] [stdout]   --> src/crypto/hex_to_base64.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn bits_to_base64(bits: Vec<bool>) -> char {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `xor`
[INFO] [stdout]  --> src/crypto/xor.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn xor(hexed_input: &str, c: char) -> String {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `decode_fixed_xor`
[INFO] [stdout]   --> src/crypto/xor.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn decode_fixed_xor(hexed_input: &str) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_char_freq`
[INFO] [stdout]   --> src/crypto/xor.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn get_char_freq(c: char) -> f32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `freq_score`
[INFO] [stdout]   --> src/crypto/xor.rs:62:4
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn freq_score(str: &str) -> f32 {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `xor_hex`
[INFO] [stdout]  --> src/crypto/xor_hex.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn xor_hex(a: &str, b: &str) -> String {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hex_to_vecu8`
[INFO] [stdout]  --> src/crypto/mod.rs:9:10
[INFO] [stdout]   |
[INFO] [stdout] 9 |   pub fn hex_to_vecu8(hex: &str) -> Vec<u8> {
[INFO] [stdout]   |          ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hex_to_u8`
[INFO] [stdout]   --> src/crypto/mod.rs:19:6
[INFO] [stdout]    |
[INFO] [stdout] 19 |   fn hex_to_u8(hex: &str) -> u8 {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hex_to_decimal`
[INFO] [stdout]   --> src/crypto/mod.rs:33:10
[INFO] [stdout]    |
[INFO] [stdout] 33 |   pub fn hex_to_decimal(hex: &str) -> i32 {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `decimal_to_bits`
[INFO] [stdout]   --> src/crypto/mod.rs:37:6
[INFO] [stdout]    |
[INFO] [stdout] 37 |   fn decimal_to_bits(d: i32) -> Vec<bool> {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hex_to_bits`
[INFO] [stdout]   --> src/crypto/mod.rs:42:10
[INFO] [stdout]    |
[INFO] [stdout] 42 |   pub fn hex_to_bits(hex: &str) -> Vec<bool> {
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `bits_to_hex`
[INFO] [stdout]   --> src/crypto/mod.rs:53:10
[INFO] [stdout]    |
[INFO] [stdout] 53 |   pub fn bits_to_hex(bits: Vec<bool>) -> String {
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `bits_to_decimal`
[INFO] [stdout]   --> src/crypto/mod.rs:62:10
[INFO] [stdout]    |
[INFO] [stdout] 62 |   pub fn bits_to_decimal(bits: Vec<bool>) -> i32 {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `Command { std: "docker" "inspect" "3eed91bc7d6ea89a2850a54d3e36fc1d9c398063f0080fcd83a25ab2a6f96be0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3eed91bc7d6ea89a2850a54d3e36fc1d9c398063f0080fcd83a25ab2a6f96be0", kill_on_drop: false }`
[INFO] [stdout] 3eed91bc7d6ea89a2850a54d3e36fc1d9c398063f0080fcd83a25ab2a6f96be0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 67b7993147f6346c08311ed393b20cdd41c61f3401612fd85692c009bd10004a
[INFO] running `Command { std: "docker" "start" "-a" "67b7993147f6346c08311ed393b20cdd41c61f3401612fd85692c009bd10004a", kill_on_drop: false }`
[INFO] [stderr]    Compiling cryptopals v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/crypto/xor.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     if (score > best_score) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `letter_counts` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/crypto/xor.rs:76:7
[INFO] [stdout]    |
[INFO] [stdout] 75 |       let v = letter_counts.get(&c).unwrap();
[INFO] [stdout]    |               ------------- immutable borrow occurs here
[INFO] [stdout] 76 |       letter_counts.insert(c, v + 1);
[INFO] [stdout]    |       ^^^^^^^^^^^^^           - immutable borrow later used here
[INFO] [stdout]    |       |
[INFO] [stdout]    |       mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hex_to_base64`
[INFO] [stdout]  --> src/crypto/hex_to_base64.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn hex_to_base64(hex: &str) -> String {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `pad_bits`
[INFO] [stdout]   --> src/crypto/hex_to_base64.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn pad_bits(bits: Vec<bool>) -> Vec<bool> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `bits_to_base64`
[INFO] [stdout]   --> src/crypto/hex_to_base64.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn bits_to_base64(bits: Vec<bool>) -> char {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `xor`
[INFO] [stdout]  --> src/crypto/xor.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn xor(hexed_input: &str, c: char) -> String {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `decode_fixed_xor`
[INFO] [stdout]   --> src/crypto/xor.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn decode_fixed_xor(hexed_input: &str) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_char_freq`
[INFO] [stdout]   --> src/crypto/xor.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn get_char_freq(c: char) -> f32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `freq_score`
[INFO] [stdout]   --> src/crypto/xor.rs:62:4
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn freq_score(str: &str) -> f32 {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `xor_hex`
[INFO] [stdout]  --> src/crypto/xor_hex.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn xor_hex(a: &str, b: &str) -> String {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hex_to_vecu8`
[INFO] [stdout]  --> src/crypto/mod.rs:9:10
[INFO] [stdout]   |
[INFO] [stdout] 9 |   pub fn hex_to_vecu8(hex: &str) -> Vec<u8> {
[INFO] [stdout]   |          ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hex_to_u8`
[INFO] [stdout]   --> src/crypto/mod.rs:19:6
[INFO] [stdout]    |
[INFO] [stdout] 19 |   fn hex_to_u8(hex: &str) -> u8 {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hex_to_decimal`
[INFO] [stdout]   --> src/crypto/mod.rs:33:10
[INFO] [stdout]    |
[INFO] [stdout] 33 |   pub fn hex_to_decimal(hex: &str) -> i32 {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `decimal_to_bits`
[INFO] [stdout]   --> src/crypto/mod.rs:37:6
[INFO] [stdout]    |
[INFO] [stdout] 37 |   fn decimal_to_bits(d: i32) -> Vec<bool> {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hex_to_bits`
[INFO] [stdout]   --> src/crypto/mod.rs:42:10
[INFO] [stdout]    |
[INFO] [stdout] 42 |   pub fn hex_to_bits(hex: &str) -> Vec<bool> {
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `bits_to_hex`
[INFO] [stdout]   --> src/crypto/mod.rs:53:10
[INFO] [stdout]    |
[INFO] [stdout] 53 |   pub fn bits_to_hex(bits: Vec<bool>) -> String {
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `bits_to_decimal`
[INFO] [stdout]   --> src/crypto/mod.rs:62:10
[INFO] [stdout]    |
[INFO] [stdout] 62 |   pub fn bits_to_decimal(bits: Vec<bool>) -> i32 {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/crypto/xor.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     if (score > best_score) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `xor`
[INFO] [stdout]  --> src/lib.rs:6:38
[INFO] [stdout]   |
[INFO] [stdout] 6 |   use crate::crypto::{hex_to_base64, xor, xor_hex};
[INFO] [stdout]   |                                      ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `letter_counts` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/crypto/xor.rs:76:7
[INFO] [stdout]    |
[INFO] [stdout] 75 |       let v = letter_counts.get(&c).unwrap();
[INFO] [stdout]    |               ------------- immutable borrow occurs here
[INFO] [stdout] 76 |       letter_counts.insert(c, v + 1);
[INFO] [stdout]    |       ^^^^^^^^^^^^^           - immutable borrow later used here
[INFO] [stdout]    |       |
[INFO] [stdout]    |       mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.08s
[INFO] running `Command { std: "docker" "inspect" "67b7993147f6346c08311ed393b20cdd41c61f3401612fd85692c009bd10004a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67b7993147f6346c08311ed393b20cdd41c61f3401612fd85692c009bd10004a", kill_on_drop: false }`
[INFO] [stdout] 67b7993147f6346c08311ed393b20cdd41c61f3401612fd85692c009bd10004a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5bf1195ce1d66d8176cdb05ece19cf74dcc30bcfb1c9d87259c8638570372b25
[INFO] running `Command { std: "docker" "start" "-a" "5bf1195ce1d66d8176cdb05ece19cf74dcc30bcfb1c9d87259c8638570372b25", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/crypto/xor.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 |     if (score > best_score) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: cannot borrow `letter_counts` as mutable because it is also borrowed as immutable
[INFO] [stderr]   --> src/crypto/xor.rs:76:7
[INFO] [stderr]    |
[INFO] [stderr] 75 |       let v = letter_counts.get(&c).unwrap();
[INFO] [stderr]    |               ------------- immutable borrow occurs here
[INFO] [stderr] 76 |       letter_counts.insert(c, v + 1);
[INFO] [stderr]    |       ^^^^^^^^^^^^^           - immutable borrow later used here
[INFO] [stderr]    |       |
[INFO] [stderr]    |       mutable borrow occurs here
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stderr]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hex_to_base64`
[INFO] [stderr]  --> src/crypto/hex_to_base64.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn hex_to_base64(hex: &str) -> String {
[INFO] [stderr]   |        ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pad_bits`
[INFO] [stderr]   --> src/crypto/hex_to_base64.rs:22:4
[INFO] [stderr]    |
[INFO] [stderr] 22 | fn pad_bits(bits: Vec<bool>) -> Vec<bool> {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `bits_to_base64`
[INFO] [stderr]   --> src/crypto/hex_to_base64.rs:31:4
[INFO] [stderr]    |
[INFO] [stderr] 31 | fn bits_to_base64(bits: Vec<bool>) -> char {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `xor`
[INFO] [stderr]  --> src/crypto/xor.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn xor(hexed_input: &str, c: char) -> String {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `decode_fixed_xor`
[INFO] [stderr]   --> src/crypto/xor.rs:14:8
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub fn decode_fixed_xor(hexed_input: &str) -> String {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_char_freq`
[INFO] [stderr]   --> src/crypto/xor.rs:30:4
[INFO] [stderr]    |
[INFO] [stderr] 30 | fn get_char_freq(c: char) -> f32 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `freq_score`
[INFO] [stderr]   --> src/crypto/xor.rs:62:4
[INFO] [stderr]    |
[INFO] [stderr] 62 | fn freq_score(str: &str) -> f32 {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `xor_hex`
[INFO] [stderr]  --> src/crypto/xor_hex.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn xor_hex(a: &str, b: &str) -> String {
[INFO] [stderr]   |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hex_to_vecu8`
[INFO] [stderr]  --> src/crypto/mod.rs:9:10
[INFO] [stderr]   |
[INFO] [stderr] 9 |   pub fn hex_to_vecu8(hex: &str) -> Vec<u8> {
[INFO] [stderr]   |          ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hex_to_u8`
[INFO] [stderr]   --> src/crypto/mod.rs:19:6
[INFO] [stderr]    |
[INFO] [stderr] 19 |   fn hex_to_u8(hex: &str) -> u8 {
[INFO] [stderr]    |      ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hex_to_decimal`
[INFO] [stderr]   --> src/crypto/mod.rs:33:10
[INFO] [stderr]    |
[INFO] [stderr] 33 |   pub fn hex_to_decimal(hex: &str) -> i32 {
[INFO] [stderr]    |          ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `decimal_to_bits`
[INFO] [stderr]   --> src/crypto/mod.rs:37:6
[INFO] [stderr]    |
[INFO] [stderr] 37 |   fn decimal_to_bits(d: i32) -> Vec<bool> {
[INFO] [stderr]    |      ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hex_to_bits`
[INFO] [stderr]   --> src/crypto/mod.rs:42:10
[INFO] [stderr]    |
[INFO] [stderr] 42 |   pub fn hex_to_bits(hex: &str) -> Vec<bool> {
[INFO] [stderr]    |          ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `bits_to_hex`
[INFO] [stderr]   --> src/crypto/mod.rs:53:10
[INFO] [stderr]    |
[INFO] [stderr] 53 |   pub fn bits_to_hex(bits: Vec<bool>) -> String {
[INFO] [stderr]    |          ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `bits_to_decimal`
[INFO] [stderr]   --> src/crypto/mod.rs:62:10
[INFO] [stderr]    |
[INFO] [stderr] 62 |   pub fn bits_to_decimal(bits: Vec<bool>) -> i32 {
[INFO] [stderr]    |          ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `cryptopals` (lib) generated 17 warnings
[INFO] [stderr] warning: unused import: `xor`
[INFO] [stderr]  --> src/lib.rs:6:38
[INFO] [stderr]   |
[INFO] [stderr] 6 |   use crate::crypto::{hex_to_base64, xor, xor_hex};
[INFO] [stderr]   |                                      ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `cryptopals` (lib test) generated 3 warnings (2 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/cryptopals-d9de9a412ba739af)
[INFO] [stdout] running 10 tests
[INFO] [stdout] test crypto::hex_to_base64::tests::test_hex_to_bits ... ok
[INFO] [stdout] test crypto::tests::test_hex_to_decimal ... ok
[INFO] [stdout] test crypto::tests::test_bits_to_decimal_6 ... ok
[INFO] [stdout] test crypto::hex_to_base64::tests::test_pad_bits ... ok
[INFO] [stdout] test crypto::tests::test_bits_to_decimal_8 ... ok
[INFO] [stdout] test tests::test_hex_to_vecu8 ... ok
[INFO] [stdout] test tests::test_hex_to_base64 ... ok
[INFO] [stdout] test tests::test_hex_to_base64_simple ... ok
[INFO] [stdout] test tests::test_xor_hex ... ok
[INFO] [stderr]    Doc-tests cryptopals
[INFO] [stdout] test crypto::xor::tests::test_decode ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> /opt/rustwide/workdir/src/crypto/xor.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 |     if (score > best_score) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5bf1195ce1d66d8176cdb05ece19cf74dcc30bcfb1c9d87259c8638570372b25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bf1195ce1d66d8176cdb05ece19cf74dcc30bcfb1c9d87259c8638570372b25", kill_on_drop: false }`
[INFO] [stdout] 5bf1195ce1d66d8176cdb05ece19cf74dcc30bcfb1c9d87259c8638570372b25