[INFO] fetching crate work_pool 0.1.0...
[INFO] testing work_pool-0.1.0 against try#33835004928d3bf65db4d4712e1330766263b0bd for pr-155739-1
[INFO] extracting crate work_pool 0.1.0 into /workspace/builds/worker-5-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-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate work_pool 0.1.0 on toolchain 33835004928d3bf65db4d4712e1330766263b0bd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "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" "+33835004928d3bf65db4d4712e1330766263b0bd" "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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 99e378690f13543392a0de32bb53b6223f2e05083aecd155f0ae106eaba75daa
[INFO] running `Command { std: "docker" "start" "-a" "99e378690f13543392a0de32bb53b6223f2e05083aecd155f0ae106eaba75daa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "99e378690f13543392a0de32bb53b6223f2e05083aecd155f0ae106eaba75daa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99e378690f13543392a0de32bb53b6223f2e05083aecd155f0ae106eaba75daa", kill_on_drop: false }`
[INFO] [stdout] 99e378690f13543392a0de32bb53b6223f2e05083aecd155f0ae106eaba75daa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9d18c190c2bb70ae84964efb8e230d2b70978bdcaceb7d7f5811971e955581b8
[INFO] running `Command { std: "docker" "start" "-a" "9d18c190c2bb70ae84964efb8e230d2b70978bdcaceb7d7f5811971e955581b8", 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 0.17s
[INFO] running `Command { std: "docker" "inspect" "9d18c190c2bb70ae84964efb8e230d2b70978bdcaceb7d7f5811971e955581b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d18c190c2bb70ae84964efb8e230d2b70978bdcaceb7d7f5811971e955581b8", kill_on_drop: false }`
[INFO] [stdout] 9d18c190c2bb70ae84964efb8e230d2b70978bdcaceb7d7f5811971e955581b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0c2e1a72b367b555b024ae9a323acb447b4c9d1468513dc87e7470cc073c9dfb
[INFO] running `Command { std: "docker" "start" "-a" "0c2e1a72b367b555b024ae9a323acb447b4c9d1468513dc87e7470cc073c9dfb", 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 0.95s
[INFO] running `Command { std: "docker" "inspect" "0c2e1a72b367b555b024ae9a323acb447b4c9d1468513dc87e7470cc073c9dfb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c2e1a72b367b555b024ae9a323acb447b4c9d1468513dc87e7470cc073c9dfb", kill_on_drop: false }`
[INFO] [stdout] 0c2e1a72b367b555b024ae9a323acb447b4c9d1468513dc87e7470cc073c9dfb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 63bcc679bc684c15d988d8f3eb2393ac865bbd994f4098551cfa6f48486c2cba
[INFO] running `Command { std: "docker" "start" "-a" "63bcc679bc684c15d988d8f3eb2393ac865bbd994f4098551cfa6f48486c2cba", 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 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/work_pool-a88eb85952881611)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test tests::should_create_pool ... ok
[INFO] [stdout] test work_queue::tests::should_add_many_to_queue ... ok
[INFO] [stdout] test work_queue::tests::should_retrieve_work ... ok
[INFO] [stdout] test work_queue::tests::should_add_to_queue ... 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" "63bcc679bc684c15d988d8f3eb2393ac865bbd994f4098551cfa6f48486c2cba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63bcc679bc684c15d988d8f3eb2393ac865bbd994f4098551cfa6f48486c2cba", kill_on_drop: false }`
[INFO] [stdout] 63bcc679bc684c15d988d8f3eb2393ac865bbd994f4098551cfa6f48486c2cba
