[INFO] cloning repository https://github.com/Void1315/send_homework
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Void1315/send_homework" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVoid1315%2Fsend_homework", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVoid1315%2Fsend_homework'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 48e2b4b960c39cf40011f8542602c92850071847
[INFO] checking Void1315/send_homework against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVoid1315%2Fsend_homework" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Void1315/send_homework on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Void1315/send_homework
[INFO] finished tweaking git repo https://github.com/Void1315/send_homework
[INFO] tweaked toml for git repo https://github.com/Void1315/send_homework written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Void1315/send_homework 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded filetime_creation v0.1.7
[INFO] [stderr]   Downloaded nt-time v0.6.9
[INFO] [stderr]   Downloaded chumsky v0.9.3
[INFO] [stderr]   Downloaded email-encoding v0.3.0
[INFO] [stderr]   Downloaded email_address v0.2.4
[INFO] [stderr]   Downloaded lzma-rust v0.1.5
[INFO] [stderr]   Downloaded lettre v0.11.6
[INFO] [stderr]   Downloaded sevenz-rust v0.5.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 26efab882e019bd8b1325ab735ccd61dc2405d7feaa93da86cc111cef4a04662
[INFO] running `Command { std: "docker" "start" "-a" "26efab882e019bd8b1325ab735ccd61dc2405d7feaa93da86cc111cef4a04662", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "26efab882e019bd8b1325ab735ccd61dc2405d7feaa93da86cc111cef4a04662", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26efab882e019bd8b1325ab735ccd61dc2405d7feaa93da86cc111cef4a04662", kill_on_drop: false }`
[INFO] [stdout] 26efab882e019bd8b1325ab735ccd61dc2405d7feaa93da86cc111cef4a04662
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c63ba0904f3a1f9e4718f33b7c353ca2f23d133980fb0b16f1af273a91945ca
[INFO] running `Command { std: "docker" "start" "-a" "2c63ba0904f3a1f9e4718f33b7c353ca2f23d133980fb0b16f1af273a91945ca", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.90
[INFO] [stderr]    Compiling autocfg v1.2.0
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]    Compiling pkg-config v0.3.30
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]    Compiling openssl v0.10.64
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]    Compiling time-macros v0.2.17
[INFO] [stderr]     Checking unicode-normalization v0.1.23
[INFO] [stderr]    Compiling native-tls v0.2.11
[INFO] [stderr]     Checking unicode-bidi v0.3.15
[INFO] [stderr]     Checking bitflags v2.5.0
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]     Checking allocator-api2 v0.2.16
[INFO] [stderr]     Checking filetime v0.2.23
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]     Checking pin-project-lite v0.2.14
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]     Checking crc-catalog v2.4.0
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking match_cfg v0.1.0
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]     Checking base64 v0.22.0
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking hostname v0.3.1
[INFO] [stderr]     Checking bit-set v0.5.3
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking crc v3.0.1
[INFO] [stderr]     Checking hashbrown v0.14.3
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking lzma-rust v0.1.5
[INFO] [stderr]     Checking filetime_creation v0.1.7
[INFO] [stderr]     Checking socket2 v0.5.6
[INFO] [stderr]     Checking idna v0.5.0
[INFO] [stderr]     Checking email-encoding v0.3.0
[INFO] [stderr]     Checking itoa v1.0.11
[INFO] [stderr]    Compiling syn v2.0.57
[INFO] [stderr]     Checking quoted_printable v0.5.0
[INFO] [stderr]     Checking time v0.3.34
[INFO] [stderr]     Checking fastrand v2.0.2
[INFO] [stderr]     Checking email_address v0.2.4
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]    Compiling openssl-sys v0.9.102
[INFO] [stderr]    Compiling psm v0.1.21
[INFO] [stderr]    Compiling stacker v0.1.15
[INFO] [stderr]     Checking url v2.5.0
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking nt-time v0.6.9
[INFO] [stderr]     Checking sevenz-rust v0.5.4
[INFO] [stderr]     Checking chumsky v0.9.3
[INFO] [stderr]     Checking chrono v0.4.37
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]     Checking lettre v0.11.6
[INFO] [stderr]     Checking send_homework v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `lettre` is imported redundantly
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     self,
[INFO] [stdout]    |     ^^^^ the item `lettre` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `lettre` is imported redundantly
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     self,
[INFO] [stdout]    |     ^^^^ the item `lettre` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/file.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let mut new_dir = std::env::current_dir().unwrap().join(TEMP_DIR);
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/file.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let mut new_dir = std::env::current_dir().unwrap().join(TEMP_DIR);
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.54s
[INFO] running `Command { std: "docker" "inspect" "2c63ba0904f3a1f9e4718f33b7c353ca2f23d133980fb0b16f1af273a91945ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c63ba0904f3a1f9e4718f33b7c353ca2f23d133980fb0b16f1af273a91945ca", kill_on_drop: false }`
[INFO] [stdout] 2c63ba0904f3a1f9e4718f33b7c353ca2f23d133980fb0b16f1af273a91945ca
[INFO] checking Void1315/send_homework against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVoid1315%2Fsend_homework" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Void1315/send_homework on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Void1315/send_homework
[INFO] finished tweaking git repo https://github.com/Void1315/send_homework
[INFO] tweaked toml for git repo https://github.com/Void1315/send_homework written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Void1315/send_homework 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e568c4f332fd0b8dbc78415757280120c82df7ca0eda42ba728df5d218cc22df
[INFO] running `Command { std: "docker" "start" "-a" "e568c4f332fd0b8dbc78415757280120c82df7ca0eda42ba728df5d218cc22df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e568c4f332fd0b8dbc78415757280120c82df7ca0eda42ba728df5d218cc22df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e568c4f332fd0b8dbc78415757280120c82df7ca0eda42ba728df5d218cc22df", kill_on_drop: false }`
[INFO] [stdout] e568c4f332fd0b8dbc78415757280120c82df7ca0eda42ba728df5d218cc22df
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 317f3759305649f4f6444b8575556940ab724eb2e426bb5e837ef0b1d9a79d3c
[INFO] running `Command { std: "docker" "start" "-a" "317f3759305649f4f6444b8575556940ab724eb2e426bb5e837ef0b1d9a79d3c", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.90
[INFO] [stderr]    Compiling autocfg v1.2.0
[INFO] [stderr]    Compiling pkg-config v0.3.30
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]    Compiling openssl v0.10.64
[INFO] [stderr]     Checking unicode-normalization v0.1.23
[INFO] [stderr]    Compiling time-macros v0.2.17
[INFO] [stderr]     Checking allocator-api2 v0.2.16
[INFO] [stderr]     Checking unicode-bidi v0.3.15
[INFO] [stderr]     Checking bitflags v2.5.0
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling native-tls v0.2.11
[INFO] [stderr]     Checking filetime v0.2.23
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking crc-catalog v2.4.0
[INFO] [stderr]     Checking pin-project-lite v0.2.14
[INFO] [stderr]     Checking base64 v0.22.0
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking match_cfg v0.1.0
[INFO] [stderr]     Checking hashbrown v0.14.3
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]     Checking idna v0.5.0
[INFO] [stderr]     Checking lzma-rust v0.1.5
[INFO] [stderr]     Checking email-encoding v0.3.0
[INFO] [stderr]     Checking hostname v0.3.1
[INFO] [stderr]     Checking bit-set v0.5.3
[INFO] [stderr]     Checking crc v3.0.1
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking filetime_creation v0.1.7
[INFO] [stderr]     Checking socket2 v0.5.6
[INFO] [stderr]    Compiling syn v2.0.57
[INFO] [stderr]     Checking email_address v0.2.4
[INFO] [stderr]     Checking itoa v1.0.11
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking url v2.5.0
[INFO] [stderr]     Checking quoted_printable v0.5.0
[INFO] [stderr]     Checking fastrand v2.0.2
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking time v0.3.34
[INFO] [stderr]    Compiling openssl-sys v0.9.102
[INFO] [stderr]    Compiling psm v0.1.21
[INFO] [stderr]    Compiling stacker v0.1.15
[INFO] [stderr]     Checking nt-time v0.6.9
[INFO] [stderr]     Checking chumsky v0.9.3
[INFO] [stderr]     Checking sevenz-rust v0.5.4
[INFO] [stderr]     Checking chrono v0.4.37
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]     Checking lettre v0.11.6
[INFO] [stderr]     Checking send_homework v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `lettre` is imported redundantly
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     self,
[INFO] [stdout]    |     ^^^^ the item `lettre` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `lettre` is imported redundantly
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     self,
[INFO] [stdout]    |     ^^^^ the item `lettre` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/file.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let mut new_dir = std::env::current_dir().unwrap().join(TEMP_DIR);
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/file.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let mut new_dir = std::env::current_dir().unwrap().join(TEMP_DIR);
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.10s
[INFO] running `Command { std: "docker" "inspect" "317f3759305649f4f6444b8575556940ab724eb2e426bb5e837ef0b1d9a79d3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "317f3759305649f4f6444b8575556940ab724eb2e426bb5e837ef0b1d9a79d3c", kill_on_drop: false }`
[INFO] [stdout] 317f3759305649f4f6444b8575556940ab724eb2e426bb5e837ef0b1d9a79d3c