[INFO] cloning repository https://github.com/masuke5/opt-for-lang2
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/masuke5/opt-for-lang2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmasuke5%2Fopt-for-lang2", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmasuke5%2Fopt-for-lang2'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e952a7ac35b5ef580526d0971273cd283ee207e0
[INFO] testing masuke5/opt-for-lang2 against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmasuke5%2Fopt-for-lang2" "/workspace/builds/worker-77/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-77/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/masuke5/opt-for-lang2 on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/masuke5/opt-for-lang2
[INFO] finished tweaking git repo https://github.com/masuke5/opt-for-lang2
[INFO] tweaked toml for git repo https://github.com/masuke5/opt-for-lang2 written to /workspace/builds/worker-77/source/Cargo.toml
[INFO] crate git repo https://github.com/masuke5/opt-for-lang2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "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-77/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 72572e93b35fd72b72bf403892e25e6a0c0c2535ad56ad429183ab48b75a58d9
[INFO] running `Command { std: "docker" "start" "-a" "72572e93b35fd72b72bf403892e25e6a0c0c2535ad56ad429183ab48b75a58d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "72572e93b35fd72b72bf403892e25e6a0c0c2535ad56ad429183ab48b75a58d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72572e93b35fd72b72bf403892e25e6a0c0c2535ad56ad429183ab48b75a58d9", kill_on_drop: false }`
[INFO] [stdout] 72572e93b35fd72b72bf403892e25e6a0c0c2535ad56ad429183ab48b75a58d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3f37cb51953574042e23a1a15a91f7def7134a0a47469be565d691b6117f9813
[INFO] running `Command { std: "docker" "start" "-a" "3f37cb51953574042e23a1a15a91f7def7134a0a47469be565d691b6117f9813", kill_on_drop: false }`
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling opt-for-lang2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]    --> src/graph.rs:117:13
[INFO] [stdout]     |
[INFO] [stdout] 117 |             value: &'a T,
[INFO] [stdout]     |             ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `pred`
[INFO] [stdout]    --> src/graph.rs:118:13
[INFO] [stdout]     |
[INFO] [stdout] 118 |             pred: Vec<usize>,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `succ`
[INFO] [stdout]    --> src/graph.rs:119:13
[INFO] [stdout]     |
[INFO] [stdout] 119 |             succ: Vec<usize>,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `Command { std: "docker" "inspect" "3f37cb51953574042e23a1a15a91f7def7134a0a47469be565d691b6117f9813", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f37cb51953574042e23a1a15a91f7def7134a0a47469be565d691b6117f9813", kill_on_drop: false }`
[INFO] [stdout] 3f37cb51953574042e23a1a15a91f7def7134a0a47469be565d691b6117f9813
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 80bfd8589d269942cebe83fac2bed9872b1e41e6f36c326140d222b01c52af6c
[INFO] running `Command { std: "docker" "start" "-a" "80bfd8589d269942cebe83fac2bed9872b1e41e6f36c326140d222b01c52af6c", kill_on_drop: false }`
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]    --> src/graph.rs:117:13
[INFO] [stdout]     |
[INFO] [stdout] 117 |             value: &'a T,
[INFO] [stdout]     |             ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling opt-for-lang2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `pred`
[INFO] [stdout]    --> src/graph.rs:118:13
[INFO] [stdout]     |
[INFO] [stdout] 118 |             pred: Vec<usize>,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `succ`
[INFO] [stdout]    --> src/graph.rs:119:13
[INFO] [stdout]     |
[INFO] [stdout] 119 |             succ: Vec<usize>,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]    --> src/graph.rs:117:13
[INFO] [stdout]     |
[INFO] [stdout] 117 |             value: &'a T,
[INFO] [stdout]     |             ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `pred`
[INFO] [stdout]    --> src/graph.rs:118:13
[INFO] [stdout]     |
[INFO] [stdout] 118 |             pred: Vec<usize>,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `succ`
[INFO] [stdout]    --> src/graph.rs:119:13
[INFO] [stdout]     |
[INFO] [stdout] 119 |             succ: Vec<usize>,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `Command { std: "docker" "inspect" "80bfd8589d269942cebe83fac2bed9872b1e41e6f36c326140d222b01c52af6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80bfd8589d269942cebe83fac2bed9872b1e41e6f36c326140d222b01c52af6c", kill_on_drop: false }`
[INFO] [stdout] 80bfd8589d269942cebe83fac2bed9872b1e41e6f36c326140d222b01c52af6c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ac7a04b86b9f30eb6a4cb95c06486dfade6a466b9fdf7302e6a3a231dcf2f1dc
[INFO] running `Command { std: "docker" "start" "-a" "ac7a04b86b9f30eb6a4cb95c06486dfade6a466b9fdf7302e6a3a231dcf2f1dc", kill_on_drop: false }`
[INFO] [stderr] warning: field is never read: `value`
[INFO] [stderr]    --> src/graph.rs:117:13
[INFO] [stderr]     |
[INFO] [stderr] 117 |             value: &'a T,
[INFO] [stderr]     |             ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `pred`
[INFO] [stderr]    --> src/graph.rs:118:13
[INFO] [stderr]     |
[INFO] [stderr] 118 |             pred: Vec<usize>,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `succ`
[INFO] [stderr]    --> src/graph.rs:119:13
[INFO] [stderr]     |
[INFO] [stderr] 119 |             succ: Vec<usize>,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `opt-for-lang2` (lib) generated 3 warnings
[INFO] [stderr] warning: `opt-for-lang2` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/opt_for_lang2-40bb8219e14b148e)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test graph::test::test_pred ... ok
[INFO] [stdout] test graph::test::test_add ... ok
[INFO] [stdout] test graph::test::test_succ ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/opt_for_lang2-e6d47a76569b7b35)
[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] [stderr]    Doc-tests opt-for-lang2
[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" "ac7a04b86b9f30eb6a4cb95c06486dfade6a466b9fdf7302e6a3a231dcf2f1dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac7a04b86b9f30eb6a4cb95c06486dfade6a466b9fdf7302e6a3a231dcf2f1dc", kill_on_drop: false }`
[INFO] [stdout] ac7a04b86b9f30eb6a4cb95c06486dfade6a466b9fdf7302e6a3a231dcf2f1dc