[INFO] cloning repository https://github.com/amiyatulu/data-structure
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/amiyatulu/data-structure" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famiyatulu%2Fdata-structure", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famiyatulu%2Fdata-structure'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dd8ab59e34491e7290954ffe82e9fc8e31587ebb
[INFO] checking amiyatulu/data-structure 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%2Famiyatulu%2Fdata-structure" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/amiyatulu/data-structure
[INFO] finished tweaking git repo https://github.com/amiyatulu/data-structure
[INFO] tweaked toml for git repo https://github.com/amiyatulu/data-structure written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/amiyatulu/data-structure 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/amiyatulu/data-structure 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-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fa2fd36f0ab7a061e7fc5b8dec2d190a2a5d0f0b69596cffbf026056d0ffc332
[INFO] running `Command { std: "docker" "start" "-a" "fa2fd36f0ab7a061e7fc5b8dec2d190a2a5d0f0b69596cffbf026056d0ffc332", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa2fd36f0ab7a061e7fc5b8dec2d190a2a5d0f0b69596cffbf026056d0ffc332", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa2fd36f0ab7a061e7fc5b8dec2d190a2a5d0f0b69596cffbf026056d0ffc332", kill_on_drop: false }`
[INFO] [stdout] fa2fd36f0ab7a061e7fc5b8dec2d190a2a5d0f0b69596cffbf026056d0ffc332
[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 -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 }`
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[INFO] running `Command { std: "docker" "start" "-a" "fa53615aec28b1f7bcdf451b262326afef719e6304782aa7f3c01254f15f9f59", kill_on_drop: false }`
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[INFO] [stderr]     Checking random-number-seed v0.1.0 (/opt/rustwide/workdir/random-number-seed)
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[INFO] [stderr]     Checking six_odd_numbers v0.1.0 (/opt/rustwide/workdir/six_odd_numbers)
[INFO] [stderr]     Checking mean v0.1.0 (/opt/rustwide/workdir/statistics/mean)
[INFO] [stderr]     Checking transcription v0.1.0 (/opt/rustwide/workdir/transcription)
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[INFO] [stderr]     Checking database v0.1.0 (/opt/rustwide/workdir/database)
[INFO] [stdout] warning: unused variable: `factorial_value`
[INFO] [stdout]   --> recursion_factorial/src/main.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let factorial_value = factorial(num);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_factorial_value`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking baby-formula v0.1.0 (/opt/rustwide/workdir/baby-formula)
[INFO] [stderr]     Checking reputation_score v0.1.0 (/opt/rustwide/workdir/reputation_score)
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> reputation_score/src/main.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 74 | struct Account {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] 75 |     id: String,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking constant-factors2 v0.1.0 (/opt/rustwide/workdir/constant-factors2)
[INFO] [stdout] warning: unused variable: `factorial_value`
[INFO] [stdout]   --> recursion_factorial/src/main.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let factorial_value = factorial(num);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_factorial_value`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> reputation_score/src/main.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 74 | struct Account {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] 75 |     id: String,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking json-parsing v0.1.0 (/opt/rustwide/workdir/json-parsing)
[INFO] [stdout] warning: unused import: `serde_json::json`
[INFO] [stdout]  --> json-parsing/src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use serde_json::json;
[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: `serde_json::json`
[INFO] [stdout]  --> json-parsing/src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use serde_json::json;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
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[INFO] [stderr]     Checking libp2p v0.53.2
[INFO] [stderr]     Checking ping v0.1.0 (/opt/rustwide/workdir/p2p-programming/ping)
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, SwarmBuilder<libp2p::builder::phase::provider::AsyncStd, libp2p::builder::phase::swarm::SwarmPhase<impl libp2p::builder::phase::AuthenticatedMultiplexedTransport, libp2p::libp2p_ping::Behaviour>>>
[INFO] [stdout]   --> p2p-programming/ping/src/main.rs:12:21
[INFO] [stdout]    |
[INFO] [stdout] 12 |       let mut swarm = libp2p::SwarmBuilder::with_new_identity()
[INFO] [stdout]    |  _____________________^
[INFO] [stdout] 13 | |         .with_async_std()
[INFO] [stdout] 14 | |         .with_tcp(
[INFO] [stdout] 15 | |             libp2p::tcp::Config::default(),
[INFO] [stdout] ...  |
[INFO] [stdout] 18 | |         )?
[INFO] [stdout] 19 | |         .with_behaviour(|_| ping::Behaviour::default())?
[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<SwarmBuilder<libp2p::builder::phase::provider::AsyncStd, libp2p::builder::phase::swarm::SwarmPhase<impl libp2p::builder::phase::AuthenticatedMultiplexedTransport, libp2p::libp2p_ping::Behaviour>>, Infallible>
[INFO] [stdout]   --> p2p-programming/ping/src/main.rs:12:21
[INFO] [stdout]    |
[INFO] [stdout] 12 |       let mut swarm = libp2p::SwarmBuilder::with_new_identity()
[INFO] [stdout]    |  _____________________^
[INFO] [stdout] 13 | |         .with_async_std()
[INFO] [stdout] 14 | |         .with_tcp(
[INFO] [stdout] 15 | |             libp2p::tcp::Config::default(),
[INFO] [stdout] ...  |
[INFO] [stdout] 18 | |         )?
[INFO] [stdout] 19 | |         .with_behaviour(|_| ping::Behaviour::default())?
[INFO] [stdout]    | |_______________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, SwarmBuilder<libp2p::builder::phase::provider::AsyncStd, libp2p::builder::phase::swarm::SwarmPhase<impl libp2p::builder::phase::AuthenticatedMultiplexedTransport, libp2p::libp2p_ping::Behaviour>>>
[INFO] [stdout]   --> p2p-programming/ping/src/main.rs:12:21
[INFO] [stdout]    |
[INFO] [stdout] 12 |       let mut swarm = libp2p::SwarmBuilder::with_new_identity()
[INFO] [stdout]    |  _____________________^
[INFO] [stdout] 13 | |         .with_async_std()
[INFO] [stdout] 14 | |         .with_tcp(
[INFO] [stdout] 15 | |             libp2p::tcp::Config::default(),
[INFO] [stdout] ...  |
[INFO] [stdout] 18 | |         )?
[INFO] [stdout] 19 | |         .with_behaviour(|_| ping::Behaviour::default())?
[INFO] [stdout]    | |________________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ping` (bin "ping" test) due to 2 previous errors
[INFO] [stdout] error: this type will no longer be must used: Result<SwarmBuilder<libp2p::builder::phase::provider::AsyncStd, libp2p::builder::phase::swarm::SwarmPhase<impl libp2p::builder::phase::AuthenticatedMultiplexedTransport, libp2p::libp2p_ping::Behaviour>>, Infallible>
[INFO] [stdout]   --> p2p-programming/ping/src/main.rs:12:21
[INFO] [stdout]    |
[INFO] [stdout] 12 |       let mut swarm = libp2p::SwarmBuilder::with_new_identity()
[INFO] [stdout]    |  _____________________^
[INFO] [stdout] 13 | |         .with_async_std()
[INFO] [stdout] 14 | |         .with_tcp(
[INFO] [stdout] 15 | |             libp2p::tcp::Config::default(),
[INFO] [stdout] ...  |
[INFO] [stdout] 18 | |         )?
[INFO] [stdout] 19 | |         .with_behaviour(|_| ping::Behaviour::default())?
[INFO] [stdout]    | |_______________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `ping` (bin "ping") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "fa53615aec28b1f7bcdf451b262326afef719e6304782aa7f3c01254f15f9f59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa53615aec28b1f7bcdf451b262326afef719e6304782aa7f3c01254f15f9f59", kill_on_drop: false }`
[INFO] [stdout] fa53615aec28b1f7bcdf451b262326afef719e6304782aa7f3c01254f15f9f59
