[INFO] cloning repository https://github.com/speederking07/sorting_alghorytms
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/speederking07/sorting_alghorytms" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fspeederking07%2Fsorting_alghorytms", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fspeederking07%2Fsorting_alghorytms'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3ae4cdfb4d19bb2c51533fe3f71f080e7fc3d997
[INFO] checking speederking07/sorting_alghorytms against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fspeederking07%2Fsorting_alghorytms" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/speederking07/sorting_alghorytms
[INFO] finished tweaking git repo https://github.com/speederking07/sorting_alghorytms
[INFO] tweaked toml for git repo https://github.com/speederking07/sorting_alghorytms written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/speederking07/sorting_alghorytms on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/speederking07/sorting_alghorytms 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b4a4e09986a3976e0dbad5f54eb6f5d0083b73b48f60ceffdc51a4970f1a1b32
[INFO] running `Command { std: "docker" "start" "-a" "b4a4e09986a3976e0dbad5f54eb6f5d0083b73b48f60ceffdc51a4970f1a1b32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b4a4e09986a3976e0dbad5f54eb6f5d0083b73b48f60ceffdc51a4970f1a1b32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4a4e09986a3976e0dbad5f54eb6f5d0083b73b48f60ceffdc51a4970f1a1b32", kill_on_drop: false }`
[INFO] [stdout] b4a4e09986a3976e0dbad5f54eb6f5d0083b73b48f60ceffdc51a4970f1a1b32
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Dunmustuse_in_always_ok" "-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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 990a7674bb8b9d804bf4f312a8103670c70d7f358ad6b59be292041f21f57d60
[INFO] running `Command { std: "docker" "start" "-a" "990a7674bb8b9d804bf4f312a8103670c70d7f358ad6b59be292041f21f57d60", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking list2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:147:48
[INFO] [stdout]     |
[INFO] [stdout] 147 |             let s_arg_pos = find_in_vec(&args, "--sort".parse().unwrap()).expect("none --sort param");
[INFO] [stdout]     |                                                ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:148:48
[INFO] [stdout]     |
[INFO] [stdout] 148 |             let o_arg_pos = find_in_vec(&args, "--comp".parse().unwrap()).expect("none --comp param");
[INFO] [stdout]     |                                                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:195:48
[INFO] [stdout]     |
[INFO] [stdout] 195 |             let s_arg_pos = find_in_vec(&args, "--sort".parse().unwrap()).expect("none --sort param");
[INFO] [stdout]     |                                                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:196:48
[INFO] [stdout]     |
[INFO] [stdout] 196 |             let o_arg_pos = find_in_vec(&args, "--comp".parse().unwrap()).expect("none --comp param");
[INFO] [stdout]     |                                                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:197:49
[INFO] [stdout]     |
[INFO] [stdout] 197 |             let st_arg_pos = find_in_vec(&args, "--stat".parse().unwrap()).expect("none --stat param");
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `list2` (bin "list2") due to 5 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:147:48
[INFO] [stdout]     |
[INFO] [stdout] 147 |             let s_arg_pos = find_in_vec(&args, "--sort".parse().unwrap()).expect("none --sort param");
[INFO] [stdout]     |                                                ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:148:48
[INFO] [stdout]     |
[INFO] [stdout] 148 |             let o_arg_pos = find_in_vec(&args, "--comp".parse().unwrap()).expect("none --comp param");
[INFO] [stdout]     |                                                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:195:48
[INFO] [stdout]     |
[INFO] [stdout] 195 |             let s_arg_pos = find_in_vec(&args, "--sort".parse().unwrap()).expect("none --sort param");
[INFO] [stdout]     |                                                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:196:48
[INFO] [stdout]     |
[INFO] [stdout] 196 |             let o_arg_pos = find_in_vec(&args, "--comp".parse().unwrap()).expect("none --comp param");
[INFO] [stdout]     |                                                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:197:49
[INFO] [stdout]     |
[INFO] [stdout] 197 |             let st_arg_pos = find_in_vec(&args, "--stat".parse().unwrap()).expect("none --stat param");
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `list2` (bin "list2" test) due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "990a7674bb8b9d804bf4f312a8103670c70d7f358ad6b59be292041f21f57d60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "990a7674bb8b9d804bf4f312a8103670c70d7f358ad6b59be292041f21f57d60", kill_on_drop: false }`
[INFO] [stdout] 990a7674bb8b9d804bf4f312a8103670c70d7f358ad6b59be292041f21f57d60