[INFO] fetching crate rudabai 2.0.4...
[INFO] building rudabai-2.0.4 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate rudabai 2.0.4 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate rudabai 2.0.4
[INFO] finished tweaking crates.io crate rudabai 2.0.4
[INFO] tweaked toml for crates.io crate rudabai 2.0.4 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rudabai 2.0.4 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rudabai 2.0.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 90a16b416807614300a10e433828807833bcb42be7d375ff4eb9e54c457a4967
[INFO] running `Command { std: "docker" "start" "-a" "90a16b416807614300a10e433828807833bcb42be7d375ff4eb9e54c457a4967", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "90a16b416807614300a10e433828807833bcb42be7d375ff4eb9e54c457a4967", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90a16b416807614300a10e433828807833bcb42be7d375ff4eb9e54c457a4967", kill_on_drop: false }`
[INFO] [stdout] 90a16b416807614300a10e433828807833bcb42be7d375ff4eb9e54c457a4967
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f046ebb7a741f8205ed12280e24683d5e6cff6e45a2356bb4e640b364a146c95
[INFO] running `Command { std: "docker" "start" "-a" "f046ebb7a741f8205ed12280e24683d5e6cff6e45a2356bb4e640b364a146c95", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling rudabai v2.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `user_exists`
[INFO] [stdout]   --> src/main.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let mut user_exists = "username already in use";
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_user_exists`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `username`
[INFO] [stdout]   --> src/main.rs:45:22
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn register_new_user(username: String, password: String) -> Result<usize, io::Error>{
[INFO] [stdout]    |                      ^^^^^^^^ unused variable
[INFO] [stdout] 46 |     let user_file = File::open("{username}.txt");
[INFO] [stdout]    |                                ---------------- you might have meant to use string interpolation in this string literal
[INFO] [stdout] ...
[INFO] [stdout] 62 |             ErrorKind::NotFound => match File::create("{username}.txt"){
[INFO] [stdout]    |                                                       ---------------- you might have meant to use string interpolation in this string literal
[INFO] [stdout]    |
[INFO] [stdout] help: string interpolation only works in `format!` invocations
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let user_file = File::open(format!("{username}.txt"));
[INFO] [stdout]    |                                ++++++++                +
[INFO] [stdout] help: string interpolation only works in `format!` invocations
[INFO] [stdout]    |
[INFO] [stdout] 62 |             ErrorKind::NotFound => match File::create(format!("{username}.txt")){
[INFO] [stdout]    |                                                       ++++++++                +
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn register_new_user(_username: String, password: String) -> Result<usize, io::Error>{
[INFO] [stdout]    |                      +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `password`
[INFO] [stdout]   --> src/main.rs:45:40
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn register_new_user(username: String, password: String) -> Result<usize, io::Error>{
[INFO] [stdout]    |                                        ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_password`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let mut user_exists = "username already in use";
[INFO] [stdout]    |         ----^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let mut user_file_content : &mut String = &mut"".to_string(); // : &str= "username";
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `register_new_user` is never used
[INFO] [stdout]   --> src/main.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn register_new_user(username: String, password: String) -> Result<usize, io::Error>{
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     check_password(username);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let _ = check_password(username);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `myUsername` should have a snake case name
[INFO] [stdout]   --> src/main.rs:30:19
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn check_password(myUsername: String) -> Result<String, io::Error>{
[INFO] [stdout]    |                   ^^^^^^^^^^ help: convert the identifier to snake case: `my_username`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `Command { std: "docker" "inspect" "f046ebb7a741f8205ed12280e24683d5e6cff6e45a2356bb4e640b364a146c95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f046ebb7a741f8205ed12280e24683d5e6cff6e45a2356bb4e640b364a146c95", kill_on_drop: false }`
[INFO] [stdout] f046ebb7a741f8205ed12280e24683d5e6cff6e45a2356bb4e640b364a146c95
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a022bd17e228c7294fad47c8cdb0c020d9f93ea2b2c879af45c077cb8b0d8d1
[INFO] running `Command { std: "docker" "start" "-a" "9a022bd17e228c7294fad47c8cdb0c020d9f93ea2b2c879af45c077cb8b0d8d1", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling rudabai v2.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `user_exists`
[INFO] [stdout]   --> src/main.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let mut user_exists = "username already in use";
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_user_exists`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `username`
[INFO] [stdout]   --> src/main.rs:45:22
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn register_new_user(username: String, password: String) -> Result<usize, io::Error>{
[INFO] [stdout]    |                      ^^^^^^^^ unused variable
[INFO] [stdout] 46 |     let user_file = File::open("{username}.txt");
[INFO] [stdout]    |                                ---------------- you might have meant to use string interpolation in this string literal
[INFO] [stdout] ...
[INFO] [stdout] 62 |             ErrorKind::NotFound => match File::create("{username}.txt"){
[INFO] [stdout]    |                                                       ---------------- you might have meant to use string interpolation in this string literal
[INFO] [stdout]    |
[INFO] [stdout] help: string interpolation only works in `format!` invocations
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let user_file = File::open(format!("{username}.txt"));
[INFO] [stdout]    |                                ++++++++                +
[INFO] [stdout] help: string interpolation only works in `format!` invocations
[INFO] [stdout]    |
[INFO] [stdout] 62 |             ErrorKind::NotFound => match File::create(format!("{username}.txt")){
[INFO] [stdout]    |                                                       ++++++++                +
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn register_new_user(_username: String, password: String) -> Result<usize, io::Error>{
[INFO] [stdout]    |                      +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `password`
[INFO] [stdout]   --> src/main.rs:45:40
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn register_new_user(username: String, password: String) -> Result<usize, io::Error>{
[INFO] [stdout]    |                                        ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_password`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let mut user_exists = "username already in use";
[INFO] [stdout]    |         ----^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let mut user_file_content : &mut String = &mut"".to_string(); // : &str= "username";
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `register_new_user` is never used
[INFO] [stdout]   --> src/main.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn register_new_user(username: String, password: String) -> Result<usize, io::Error>{
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     check_password(username);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let _ = check_password(username);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `myUsername` should have a snake case name
[INFO] [stdout]   --> src/main.rs:30:19
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn check_password(myUsername: String) -> Result<String, io::Error>{
[INFO] [stdout]    |                   ^^^^^^^^^^ help: convert the identifier to snake case: `my_username`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "9a022bd17e228c7294fad47c8cdb0c020d9f93ea2b2c879af45c077cb8b0d8d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a022bd17e228c7294fad47c8cdb0c020d9f93ea2b2c879af45c077cb8b0d8d1", kill_on_drop: false }`
[INFO] [stdout] 9a022bd17e228c7294fad47c8cdb0c020d9f93ea2b2c879af45c077cb8b0d8d1
