[INFO] fetching crate warm_channels 0.3.0...
[INFO] checking warm_channels-0.3.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate warm_channels 0.3.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate warm_channels 0.3.0
[INFO] finished tweaking crates.io crate warm_channels 0.3.0
[INFO] tweaked toml for crates.io crate warm_channels 0.3.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate warm_channels 0.3.0 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 crates.io crate warm_channels 0.3.0 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] e066e7f7acfb25e43f2fc5dd4df843f721774c00a7580dfe4b8d7b6e4f9a9d94
[INFO] running `Command { std: "docker" "start" "-a" "e066e7f7acfb25e43f2fc5dd4df843f721774c00a7580dfe4b8d7b6e4f9a9d94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e066e7f7acfb25e43f2fc5dd4df843f721774c00a7580dfe4b8d7b6e4f9a9d94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e066e7f7acfb25e43f2fc5dd4df843f721774c00a7580dfe4b8d7b6e4f9a9d94", kill_on_drop: false }`
[INFO] [stdout] e066e7f7acfb25e43f2fc5dd4df843f721774c00a7580dfe4b8d7b6e4f9a9d94
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] c286ee9320dd1120e1eaaa9ba4240d19af10e821310dfa177bec1da5e97a5d44
[INFO] running `Command { std: "docker" "start" "-a" "c286ee9320dd1120e1eaaa9ba4240d19af10e821310dfa177bec1da5e97a5d44", kill_on_drop: false }`
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[INFO] [stderr]     Checking warm_channels v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<tower::discover::Change<PoolMemberKey, <M as PoolMemberMaker<A>>::Connection>, Infallible>
[INFO] [stdout]    --> src/pool.rs:585:27
[INFO] [stdout]     |
[INFO] [stdout] 585 |                     yield Ok(Change::Insert(key, conn));
[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<tower::discover::Change<PoolMemberKey, <M as PoolMemberMaker<A>>::Connection>, Infallible>
[INFO] [stdout]    --> src/pool.rs:604:27
[INFO] [stdout]     |
[INFO] [stdout] 604 |                     yield Ok(Change::Remove(k));
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<tower::discover::Change<PoolMemberKey, <M as PoolMemberMaker<A>>::Connection>, Infallible>
[INFO] [stdout]    --> src/pool.rs:610:39
[INFO] [stdout]     |
[INFO] [stdout] 610 | ...                   yield Ok(Change::Remove(k));
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `warm_channels` (lib) due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "c286ee9320dd1120e1eaaa9ba4240d19af10e821310dfa177bec1da5e97a5d44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c286ee9320dd1120e1eaaa9ba4240d19af10e821310dfa177bec1da5e97a5d44", kill_on_drop: false }`
[INFO] [stdout] c286ee9320dd1120e1eaaa9ba4240d19af10e821310dfa177bec1da5e97a5d44
