[INFO] cloning repository https://github.com/weixinZhang12/rust_student_manger
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/weixinZhang12/rust_student_manger" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FweixinZhang12%2Frust_student_manger", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FweixinZhang12%2Frust_student_manger'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6a9742999629b666bf53b4fccf028fa42785e45e
[INFO] testing weixinZhang12/rust_student_manger against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FweixinZhang12%2Frust_student_manger" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/weixinZhang12/rust_student_manger
[INFO] finished tweaking git repo https://github.com/weixinZhang12/rust_student_manger
[INFO] tweaked toml for git repo https://github.com/weixinZhang12/rust_student_manger written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/weixinZhang12/rust_student_manger on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/weixinZhang12/rust_student_manger 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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fa80bab7aa95e0a27505627d16bd7132695fda2e3eb8464aceb625bed4bae5c0
[INFO] running `Command { std: "docker" "start" "-a" "fa80bab7aa95e0a27505627d16bd7132695fda2e3eb8464aceb625bed4bae5c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa80bab7aa95e0a27505627d16bd7132695fda2e3eb8464aceb625bed4bae5c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa80bab7aa95e0a27505627d16bd7132695fda2e3eb8464aceb625bed4bae5c0", kill_on_drop: false }`
[INFO] [stdout] fa80bab7aa95e0a27505627d16bd7132695fda2e3eb8464aceb625bed4bae5c0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f30eb13195b48f52ddf064681eb4e6c06de281056a296ec49090add7dc1e878e
[INFO] running `Command { std: "docker" "start" "-a" "f30eb13195b48f52ddf064681eb4e6c06de281056a296ec49090add7dc1e878e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.89
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling serde v1.0.215
[INFO] [stderr]    Compiling serde_json v1.0.132
[INFO] [stderr]    Compiling memchr v2.7.4
[INFO] [stderr]    Compiling colored v2.1.0
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.87
[INFO] [stderr]    Compiling serde_derive v1.0.215
[INFO] [stderr]    Compiling manager v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `fs`
[INFO] [stdout]  --> src/main.rs:1:47
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, error::Error, fs};
[INFO] [stdout]   |                                               ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::hash`
[INFO] [stdout]  --> src/utils.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::hash;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/utils.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |     error::{self, Error},
[INFO] [stdout]   |             ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde_json::ser`
[INFO] [stdout]  --> src/utils.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use serde_json::ser;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/utils.rs:17:14
[INFO] [stdout]    |
[INFO] [stdout] 17 |         Some(v) => true,
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `age` is never read
[INFO] [stdout]   --> src/utils.rs:30:19
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let mut age = 0;
[INFO] [stdout]    |                   ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/utils.rs:71:14
[INFO] [stdout]    |
[INFO] [stdout] 71 |         Some(v) => {
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `age` is never read
[INFO] [stdout]    --> src/utils.rs:104:19
[INFO] [stdout]     |
[INFO] [stdout] 104 |     let mut age = 0;
[INFO] [stdout]     |                   ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut studentArray = Vec::<Student>::new();
[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:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let mut input_number = input.trim().parse::<i32>().unwrap_or(-1);
[INFO] [stdout]    |             ----^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `studentArray`
[INFO] [stdout]   --> src/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut studentArray = Vec::<Student>::new();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_studentArray`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/main.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |         Err(e) => write_hash_to_file(&student_map)?,
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/main.rs:48:24
[INFO] [stdout]    |
[INFO] [stdout] 48 |                     Ok(v) => {}
[INFO] [stdout]    |                        ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/main.rs:91:24
[INFO] [stdout]    |
[INFO] [stdout] 91 |                     Ok(v) => {
[INFO] [stdout]    |                        ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `help_s` should have an upper case name
[INFO] [stdout]   --> src/main.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 | const help_s: &str = "
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] help: convert the identifier to upper case
[INFO] [stdout]    |
[INFO] [stdout] 10 - const help_s: &str = "
[INFO] [stdout] 10 + const HELP_S: &str = "
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `studentArray` should have a snake case name
[INFO] [stdout]   --> src/main.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut studentArray = Vec::<Student>::new();
[INFO] [stdout]    |             ^^^^^^^^^^^^ help: convert the identifier to snake case: `student_array`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/utils.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     std::io::stdin().read_line(&mut student_id);
[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] 68 |     let _ = std::io::stdin().read_line(&mut student_id);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/utils.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |             write_hash_to_file(&student_map);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 72 |             let _ = write_hash_to_file(&student_map);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.26s
[INFO] running `Command { std: "docker" "inspect" "f30eb13195b48f52ddf064681eb4e6c06de281056a296ec49090add7dc1e878e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f30eb13195b48f52ddf064681eb4e6c06de281056a296ec49090add7dc1e878e", kill_on_drop: false }`
[INFO] [stdout] f30eb13195b48f52ddf064681eb4e6c06de281056a296ec49090add7dc1e878e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7dfbc8f9e84189cb6ae4950519e49cc1f79fc94891b5b3ab1a65e5cc992e5819
[INFO] running `Command { std: "docker" "start" "-a" "7dfbc8f9e84189cb6ae4950519e49cc1f79fc94891b5b3ab1a65e5cc992e5819", kill_on_drop: false }`
[INFO] [stderr]    Compiling manager v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `fs`
[INFO] [stdout]  --> src/main.rs:1:47
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, error::Error, fs};
[INFO] [stdout]   |                                               ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::hash`
[INFO] [stdout]  --> src/utils.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::hash;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/utils.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |     error::{self, Error},
[INFO] [stdout]   |             ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde_json::ser`
[INFO] [stdout]  --> src/utils.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use serde_json::ser;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/utils.rs:17:14
[INFO] [stdout]    |
[INFO] [stdout] 17 |         Some(v) => true,
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `age` is never read
[INFO] [stdout]   --> src/utils.rs:30:19
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let mut age = 0;
[INFO] [stdout]    |                   ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/utils.rs:71:14
[INFO] [stdout]    |
[INFO] [stdout] 71 |         Some(v) => {
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `age` is never read
[INFO] [stdout]    --> src/utils.rs:104:19
[INFO] [stdout]     |
[INFO] [stdout] 104 |     let mut age = 0;
[INFO] [stdout]     |                   ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut studentArray = Vec::<Student>::new();
[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:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let mut input_number = input.trim().parse::<i32>().unwrap_or(-1);
[INFO] [stdout]    |             ----^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `studentArray`
[INFO] [stdout]   --> src/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut studentArray = Vec::<Student>::new();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_studentArray`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/main.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |         Err(e) => write_hash_to_file(&student_map)?,
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/main.rs:48:24
[INFO] [stdout]    |
[INFO] [stdout] 48 |                     Ok(v) => {}
[INFO] [stdout]    |                        ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/main.rs:91:24
[INFO] [stdout]    |
[INFO] [stdout] 91 |                     Ok(v) => {
[INFO] [stdout]    |                        ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `help_s` should have an upper case name
[INFO] [stdout]   --> src/main.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 | const help_s: &str = "
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] help: convert the identifier to upper case
[INFO] [stdout]    |
[INFO] [stdout] 10 - const help_s: &str = "
[INFO] [stdout] 10 + const HELP_S: &str = "
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `studentArray` should have a snake case name
[INFO] [stdout]   --> src/main.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut studentArray = Vec::<Student>::new();
[INFO] [stdout]    |             ^^^^^^^^^^^^ help: convert the identifier to snake case: `student_array`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/utils.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     std::io::stdin().read_line(&mut student_id);
[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] 68 |     let _ = std::io::stdin().read_line(&mut student_id);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/utils.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |             write_hash_to_file(&student_map);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 72 |             let _ = write_hash_to_file(&student_map);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "7dfbc8f9e84189cb6ae4950519e49cc1f79fc94891b5b3ab1a65e5cc992e5819", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7dfbc8f9e84189cb6ae4950519e49cc1f79fc94891b5b3ab1a65e5cc992e5819", kill_on_drop: false }`
[INFO] [stdout] 7dfbc8f9e84189cb6ae4950519e49cc1f79fc94891b5b3ab1a65e5cc992e5819
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d83457f0564d71b41fd6d69a6543fceac43a78a287a63211123186683673b8c8
[INFO] running `Command { std: "docker" "start" "-a" "d83457f0564d71b41fd6d69a6543fceac43a78a287a63211123186683673b8c8", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `fs`
[INFO] [stderr]  --> src/main.rs:1:47
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{collections::HashMap, error::Error, fs};
[INFO] [stderr]   |                                               ^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `core::hash`
[INFO] [stderr]  --> src/utils.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use core::hash;
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]  --> src/utils.rs:4:13
[INFO] [stderr]   |
[INFO] [stderr] 4 |     error::{self, Error},
[INFO] [stderr]   |             ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `serde_json::ser`
[INFO] [stderr]  --> src/utils.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use serde_json::ser;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/utils.rs:17:14
[INFO] [stderr]    |
[INFO] [stderr] 17 |         Some(v) => true,
[INFO] [stderr]    |              ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `age` is never read
[INFO] [stderr]   --> src/utils.rs:30:19
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let mut age = 0;
[INFO] [stderr]    |                   ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/utils.rs:71:14
[INFO] [stderr]    |
[INFO] [stderr] 71 |         Some(v) => {
[INFO] [stderr]    |              ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `age` is never read
[INFO] [stderr]    --> src/utils.rs:104:19
[INFO] [stderr]     |
[INFO] [stderr] 104 |     let mut age = 0;
[INFO] [stderr]     |                   ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let mut studentArray = Vec::<Student>::new();
[INFO] [stderr]    |         ----^^^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |         let mut input_number = input.trim().parse::<i32>().unwrap_or(-1);
[INFO] [stderr]    |             ----^^^^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `studentArray`
[INFO] [stderr]   --> src/main.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let mut studentArray = Vec::<Student>::new();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_studentArray`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/main.rs:30:13
[INFO] [stderr]    |
[INFO] [stderr] 30 |         Err(e) => write_hash_to_file(&student_map)?,
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/main.rs:48:24
[INFO] [stderr]    |
[INFO] [stderr] 48 |                     Ok(v) => {}
[INFO] [stderr]    |                        ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/main.rs:91:24
[INFO] [stderr]    |
[INFO] [stderr] 91 |                     Ok(v) => {
[INFO] [stderr]    |                        ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: constant `help_s` should have an upper case name
[INFO] [stderr]   --> src/main.rs:10:7
[INFO] [stderr]    |
[INFO] [stderr] 10 | const help_s: &str = "
[INFO] [stderr]    |       ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_upper_case_globals)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] help: convert the identifier to upper case
[INFO] [stderr]    |
[INFO] [stderr] 10 - const help_s: &str = "
[INFO] [stderr] 10 + const HELP_S: &str = "
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: variable `studentArray` should have a snake case name
[INFO] [stderr]   --> src/main.rs:24:13
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let mut studentArray = Vec::<Student>::new();
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: convert the identifier to snake case: `student_array`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/utils.rs:68:5
[INFO] [stderr]    |
[INFO] [stderr] 68 |     std::io::stdin().read_line(&mut student_id);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 68 |     let _ = std::io::stdin().read_line(&mut student_id);
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/utils.rs:72:13
[INFO] [stderr]    |
[INFO] [stderr] 72 |             write_hash_to_file(&student_map);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 72 |             let _ = write_hash_to_file(&student_map);
[INFO] [stderr]    |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `manager` (bin "manager" test) generated 18 warnings (run `cargo fix --bin "manager" -p manager --tests` to apply 13 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/manager-d7a64718e0ca2ab3)
[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" "d83457f0564d71b41fd6d69a6543fceac43a78a287a63211123186683673b8c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d83457f0564d71b41fd6d69a6543fceac43a78a287a63211123186683673b8c8", kill_on_drop: false }`
[INFO] [stdout] d83457f0564d71b41fd6d69a6543fceac43a78a287a63211123186683673b8c8
