[INFO] cloning repository https://github.com/DadouBordeaux/rust_backend
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DadouBordeaux/rust_backend" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDadouBordeaux%2Frust_backend", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDadouBordeaux%2Frust_backend'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0e6c53d5c524288b2642cc206ecc4db0c73367e4
[INFO] testing DadouBordeaux/rust_backend against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDadouBordeaux%2Frust_backend" "/workspace/builds/worker-16/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-16/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DadouBordeaux/rust_backend on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/DadouBordeaux/rust_backend
[INFO] finished tweaking git repo https://github.com/DadouBordeaux/rust_backend
[INFO] tweaked toml for git repo https://github.com/DadouBordeaux/rust_backend written to /workspace/builds/worker-16/source/Cargo.toml
[INFO] crate git repo https://github.com/DadouBordeaux/rust_backend already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a4adbb8fcf19e58ffe3b57bd708553fa03bc9e98915a76d899231dbe6288ad92
[INFO] running `Command { std: "docker" "start" "-a" "a4adbb8fcf19e58ffe3b57bd708553fa03bc9e98915a76d899231dbe6288ad92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a4adbb8fcf19e58ffe3b57bd708553fa03bc9e98915a76d899231dbe6288ad92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4adbb8fcf19e58ffe3b57bd708553fa03bc9e98915a76d899231dbe6288ad92", kill_on_drop: false }`
[INFO] [stdout] a4adbb8fcf19e58ffe3b57bd708553fa03bc9e98915a76d899231dbe6288ad92
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 100f39aebf2eff4e8196088a6e917b20c04b38e2b54359e3b8c1c6807629c3d1
[INFO] running `Command { std: "docker" "start" "-a" "100f39aebf2eff4e8196088a6e917b20c04b38e2b54359e3b8c1c6807629c3d1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `read_to_string`
[INFO] [stdout]  --> src/main.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs::{read_to_string, File};
[INFO] [stdout]   |               ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file`
[INFO] [stdout]    --> src/main.rs:149:13
[INFO] [stdout]     |
[INFO] [stdout] 149 |     let mut file = File::open(path);
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_file`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `todo`
[INFO] [stdout]    --> src/main.rs:147:43
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn update_todo_list(todo_list: &TodoList, todo: Todo) -> Result<(), std::io::Error> {
[INFO] [stdout]     |                                           ^^^^ help: if this is intentional, prefix it with an underscore: `_todo`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:149:9
[INFO] [stdout]     |
[INFO] [stdout] 149 |     let mut file = File::open(path);
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_todo`
[INFO] [stdout]   --> src/main.rs:88:12
[INFO] [stdout]    |
[INFO] [stdout] 88 |     pub fn add_todo(&mut self, todo: Todo) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `description`
[INFO] [stdout]    --> src/main.rs:121:5
[INFO] [stdout]     |
[INFO] [stdout] 121 |     description: String,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: `Todo` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    --> src/main.rs:118:10
[INFO] [stdout]     |
[INFO] [stdout] 118 | #[derive(Clone, Debug)]
[INFO] [stdout]     |          ^^^^^  ^^^^^
[INFO] [stdout]     = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `update_todo_list`
[INFO] [stdout]    --> src/main.rs:147:4
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn update_todo_list(todo_list: &TodoList, todo: Todo) -> Result<(), std::io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.19s
[INFO] running `Command { std: "docker" "inspect" "100f39aebf2eff4e8196088a6e917b20c04b38e2b54359e3b8c1c6807629c3d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "100f39aebf2eff4e8196088a6e917b20c04b38e2b54359e3b8c1c6807629c3d1", kill_on_drop: false }`
[INFO] [stdout] 100f39aebf2eff4e8196088a6e917b20c04b38e2b54359e3b8c1c6807629c3d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 53854dd7610bf69a3ecd9d2b9a4e1a410ac7bb7e540ba1ff3039faad94bf2c42
[INFO] running `Command { std: "docker" "start" "-a" "53854dd7610bf69a3ecd9d2b9a4e1a410ac7bb7e540ba1ff3039faad94bf2c42", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `read_to_string`
[INFO] [stdout]  --> src/main.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs::{read_to_string, File};
[INFO] [stdout]   |               ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file`
[INFO] [stdout]    --> src/main.rs:149:13
[INFO] [stdout]     |
[INFO] [stdout] 149 |     let mut file = File::open(path);
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_file`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `todo`
[INFO] [stdout]    --> src/main.rs:147:43
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn update_todo_list(todo_list: &TodoList, todo: Todo) -> Result<(), std::io::Error> {
[INFO] [stdout]     |                                           ^^^^ help: if this is intentional, prefix it with an underscore: `_todo`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:149:9
[INFO] [stdout]     |
[INFO] [stdout] 149 |     let mut file = File::open(path);
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_todo`
[INFO] [stdout]   --> src/main.rs:88:12
[INFO] [stdout]    |
[INFO] [stdout] 88 |     pub fn add_todo(&mut self, todo: Todo) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `description`
[INFO] [stdout]    --> src/main.rs:121:5
[INFO] [stdout]     |
[INFO] [stdout] 121 |     description: String,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: `Todo` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    --> src/main.rs:118:10
[INFO] [stdout]     |
[INFO] [stdout] 118 | #[derive(Clone, Debug)]
[INFO] [stdout]     |          ^^^^^  ^^^^^
[INFO] [stdout]     = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `update_todo_list`
[INFO] [stdout]    --> src/main.rs:147:4
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn update_todo_list(todo_list: &TodoList, todo: Todo) -> Result<(), std::io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.43s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/rust-dd803576ab748598)
[INFO] running `Command { std: "docker" "inspect" "53854dd7610bf69a3ecd9d2b9a4e1a410ac7bb7e540ba1ff3039faad94bf2c42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53854dd7610bf69a3ecd9d2b9a4e1a410ac7bb7e540ba1ff3039faad94bf2c42", kill_on_drop: false }`
[INFO] [stdout] 53854dd7610bf69a3ecd9d2b9a4e1a410ac7bb7e540ba1ff3039faad94bf2c42
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0e0428d87cf3111a6ab538536efc012c5364c5d70ac364d7e18d644c05171400
[INFO] running `Command { std: "docker" "start" "-a" "0e0428d87cf3111a6ab538536efc012c5364c5d70ac364d7e18d644c05171400", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused import: `read_to_string`
[INFO] [stdout] running 0 tests
[INFO] [stderr]  --> src/main.rs:1:15
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 1 | use std::fs::{read_to_string, File};
[INFO] [stdout] 
[INFO] [stderr]   |               ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `file`
[INFO] [stderr]    --> src/main.rs:149:13
[INFO] [stderr]     |
[INFO] [stderr] 149 |     let mut file = File::open(path);
[INFO] [stderr]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_file`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `todo`
[INFO] [stderr]    --> src/main.rs:147:43
[INFO] [stderr]     |
[INFO] [stderr] 147 | fn update_todo_list(todo_list: &TodoList, todo: Todo) -> Result<(), std::io::Error> {
[INFO] [stderr]     |                                           ^^^^ help: if this is intentional, prefix it with an underscore: `_todo`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:149:9
[INFO] [stderr]     |
[INFO] [stderr] 149 |     let mut file = File::open(path);
[INFO] [stderr]     |         ----^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `add_todo`
[INFO] [stderr]   --> src/main.rs:88:12
[INFO] [stderr]    |
[INFO] [stderr] 88 |     pub fn add_todo(&mut self, todo: Todo) {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `description`
[INFO] [stderr]    --> src/main.rs:121:5
[INFO] [stderr]     |
[INFO] [stderr] 121 |     description: String,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] note: `Todo` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]    --> src/main.rs:118:10
[INFO] [stderr]     |
[INFO] [stderr] 118 | #[derive(Clone, Debug)]
[INFO] [stderr]     |          ^^^^^  ^^^^^
[INFO] [stderr]     = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `update_todo_list`
[INFO] [stderr]    --> src/main.rs:147:4
[INFO] [stderr]     |
[INFO] [stderr] 147 | fn update_todo_list(todo_list: &TodoList, todo: Todo) -> Result<(), std::io::Error> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust` (bin "rust" test) generated 7 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust-dd803576ab748598)
[INFO] running `Command { std: "docker" "inspect" "0e0428d87cf3111a6ab538536efc012c5364c5d70ac364d7e18d644c05171400", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e0428d87cf3111a6ab538536efc012c5364c5d70ac364d7e18d644c05171400", kill_on_drop: false }`
[INFO] [stdout] 0e0428d87cf3111a6ab538536efc012c5364c5d70ac364d7e18d644c05171400