[INFO] fetching crate zerg 0.0.4...
[INFO] checking zerg-0.0.4 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate zerg 0.0.4 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate zerg 0.0.4
[INFO] finished tweaking crates.io crate zerg 0.0.4
[INFO] tweaked toml for crates.io crate zerg 0.0.4 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate zerg 0.0.4 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 81 packages to latest compatible versions
[INFO] [stderr]       Adding hyper v0.14.32 (available: v1.8.0)
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[INFO] [stderr]       Adding tower v0.4.13 (available: v0.5.2)
[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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 5f9c4ba1379adbe3d84b37675a8b9a04ee279a27ba224a41ab79c382deb5870e
[INFO] running `Command { std: "docker" "start" "-a" "5f9c4ba1379adbe3d84b37675a8b9a04ee279a27ba224a41ab79c382deb5870e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5f9c4ba1379adbe3d84b37675a8b9a04ee279a27ba224a41ab79c382deb5870e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f9c4ba1379adbe3d84b37675a8b9a04ee279a27ba224a41ab79c382deb5870e", kill_on_drop: false }`
[INFO] [stdout] 5f9c4ba1379adbe3d84b37675a8b9a04ee279a27ba224a41ab79c382deb5870e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 893fa90d8a6140fc8cfa7b049664abf30e9f002d54c6b88b13d2e7ee5b514dfd
[INFO] running `Command { std: "docker" "start" "-a" "893fa90d8a6140fc8cfa7b049664abf30e9f002d54c6b88b13d2e7ee5b514dfd", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.110
[INFO] [stderr]     Checking futures-channel v0.3.31
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]     Checking tracing v0.1.41
[INFO] [stderr]     Checking tokio v1.48.0
[INFO] [stderr]     Checking tdigest v0.2.3
[INFO] [stderr]     Checking serde_json v1.0.145
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling pin-project-internal v1.1.10
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking pin-project v1.1.10
[INFO] [stderr]     Checking futures-executor v0.3.31
[INFO] [stderr]     Checking hyper v0.14.32
[INFO] [stderr]     Checking tower v0.4.13
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stderr]     Checking zerg v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<std::iter::Once<std::net::SocketAddr>, Infallible>
[INFO] [stdout]   --> src/lib.rs:57:57
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let dns = tower::service_fn(move |_| async move { Ok::<_, Infallible>(iter::once(addr)) });
[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<std::iter::Once<std::net::SocketAddr>, Infallible>
[INFO] [stdout]   --> src/lib.rs:57:59
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let dns = tower::service_fn(move |_| async move { Ok::<_, Infallible>(iter::once(addr)) });
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `zerg` (lib) due to 2 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<std::iter::Once<std::net::SocketAddr>, Infallible>
[INFO] [stdout]   --> src/lib.rs:57:57
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let dns = tower::service_fn(move |_| async move { Ok::<_, Infallible>(iter::once(addr)) });
[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<std::iter::Once<std::net::SocketAddr>, Infallible>
[INFO] [stdout]   --> src/lib.rs:57:59
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let dns = tower::service_fn(move |_| async move { Ok::<_, Infallible>(iter::once(addr)) });
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `zerg` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "893fa90d8a6140fc8cfa7b049664abf30e9f002d54c6b88b13d2e7ee5b514dfd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "893fa90d8a6140fc8cfa7b049664abf30e9f002d54c6b88b13d2e7ee5b514dfd", kill_on_drop: false }`
[INFO] [stdout] 893fa90d8a6140fc8cfa7b049664abf30e9f002d54c6b88b13d2e7ee5b514dfd
