[INFO] fetching crate work_pool 0.1.0...
[INFO] testing work_pool-0.1.0 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-8
[INFO] extracting crate work_pool 0.1.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate work_pool 0.1.0
[INFO] finished tweaking crates.io crate work_pool 0.1.0
[INFO] tweaked toml for crates.io crate work_pool 0.1.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate work_pool 0.1.0 on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate work_pool 0.1.0 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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4411ca47e7396d83a883e77bbd6f1e81f909fcc9d41b8faad05169d01a0264bb
[INFO] running `Command { std: "docker" "start" "-a" "4411ca47e7396d83a883e77bbd6f1e81f909fcc9d41b8faad05169d01a0264bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4411ca47e7396d83a883e77bbd6f1e81f909fcc9d41b8faad05169d01a0264bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4411ca47e7396d83a883e77bbd6f1e81f909fcc9d41b8faad05169d01a0264bb", kill_on_drop: false }`
[INFO] [stdout] 4411ca47e7396d83a883e77bbd6f1e81f909fcc9d41b8faad05169d01a0264bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "-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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 59709bca94076e1389ec9c6551c2d6ffb5bce0c10d0080878ea5f547dd05c613
[INFO] running `Command { std: "docker" "start" "-a" "59709bca94076e1389ec9c6551c2d6ffb5bce0c10d0080878ea5f547dd05c613", kill_on_drop: false }`
[INFO] [stderr]    Compiling work_pool v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/lib.rs:91:13
[INFO] [stdout]    |
[INFO] [stdout] 91 |             drop(t)
[INFO] [stdout]    |             ^^^^^-^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&mut JoinHandle<()>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "59709bca94076e1389ec9c6551c2d6ffb5bce0c10d0080878ea5f547dd05c613", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59709bca94076e1389ec9c6551c2d6ffb5bce0c10d0080878ea5f547dd05c613", kill_on_drop: false }`
[INFO] [stdout] 59709bca94076e1389ec9c6551c2d6ffb5bce0c10d0080878ea5f547dd05c613
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "-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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 928162eeeca2b3d153c89a8e5a8bb6d77e6c425f9f971ca32ab27ca962f9b56f
[INFO] running `Command { std: "docker" "start" "-a" "928162eeeca2b3d153c89a8e5a8bb6d77e6c425f9f971ca32ab27ca962f9b56f", kill_on_drop: false }`
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/lib.rs:91:13
[INFO] [stdout]    |
[INFO] [stdout] 91 |             drop(t)
[INFO] [stdout]    |             ^^^^^-^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&mut JoinHandle<()>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling work_pool v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/lib.rs:91:13
[INFO] [stdout]    |
[INFO] [stdout] 91 |             drop(t)
[INFO] [stdout]    |             ^^^^^-^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&mut JoinHandle<()>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `Command { std: "docker" "inspect" "928162eeeca2b3d153c89a8e5a8bb6d77e6c425f9f971ca32ab27ca962f9b56f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "928162eeeca2b3d153c89a8e5a8bb6d77e6c425f9f971ca32ab27ca962f9b56f", kill_on_drop: false }`
[INFO] [stdout] 928162eeeca2b3d153c89a8e5a8bb6d77e6c425f9f971ca32ab27ca962f9b56f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "-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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] eab7abd173272d91416a95c0c52775f715d29c042f49991f2e522d54710fa638
[INFO] running `Command { std: "docker" "start" "-a" "eab7abd173272d91416a95c0c52775f715d29c042f49991f2e522d54710fa638", kill_on_drop: false }`
[INFO] [stderr] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stderr]   --> src/lib.rs:91:13
[INFO] [stderr]    |
[INFO] [stderr] 91 |             drop(t)
[INFO] [stderr]    |             ^^^^^-^
[INFO] [stderr]    |                  |
[INFO] [stderr]    |                  argument has type `&mut JoinHandle<()>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `work_pool` (lib) generated 1 warning
[INFO] [stderr] warning: `work_pool` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/work_pool-17b1f3c6a39dbfd1)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test work_queue::tests::should_add_many_to_queue ... ok
[INFO] [stdout] test work_queue::tests::should_add_to_queue ... ok
[INFO] [stdout] test tests::should_create_pool ... ok
[INFO] [stdout] test work_queue::tests::should_retrieve_work ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests work_pool
[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" "eab7abd173272d91416a95c0c52775f715d29c042f49991f2e522d54710fa638", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eab7abd173272d91416a95c0c52775f715d29c042f49991f2e522d54710fa638", kill_on_drop: false }`
[INFO] [stdout] eab7abd173272d91416a95c0c52775f715d29c042f49991f2e522d54710fa638