[INFO] fetching crate plumbing 1.0.0...
[INFO] testing plumbing-1.0.0 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-2
[INFO] extracting crate plumbing 1.0.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate plumbing 1.0.0
[INFO] finished tweaking crates.io crate plumbing 1.0.0
[INFO] tweaked toml for crates.io crate plumbing 1.0.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate plumbing 1.0.0 on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "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" "+562dee4820c458d823175268e41601d4c060588a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 25 packages to latest compatible versions
[INFO] [stderr]       Adding tokio v0.2.25 (available: v1.52.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num_cpus v1.17.0
[INFO] [stderr]   Downloaded tokio-macros v0.2.6
[INFO] [stderr]   Downloaded pin-project-lite v0.1.12
[INFO] [stderr]   Downloaded bytes v0.5.6
[INFO] [stderr]   Downloaded foreback v1.1.2
[INFO] [stderr]   Downloaded tokio v0.2.25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0776e7b7cd31238d256bae9cc334fdcac4dc6f45794264f9ece454070fcc233b
[INFO] running `Command { std: "docker" "start" "-a" "0776e7b7cd31238d256bae9cc334fdcac4dc6f45794264f9ece454070fcc233b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0776e7b7cd31238d256bae9cc334fdcac4dc6f45794264f9ece454070fcc233b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0776e7b7cd31238d256bae9cc334fdcac4dc6f45794264f9ece454070fcc233b", kill_on_drop: false }`
[INFO] [stdout] 0776e7b7cd31238d256bae9cc334fdcac4dc6f45794264f9ece454070fcc233b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7267ee1d5cddf410247e7123e11aa69300e721ec76b6cc868dd4e43c7e9e66c3
[INFO] running `Command { std: "docker" "start" "-a" "7267ee1d5cddf410247e7123e11aa69300e721ec76b6cc868dd4e43c7e9e66c3", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling unicode-ident v1.0.24
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling futures-core v0.3.32
[INFO] [stderr]    Compiling futures-sink v0.3.32
[INFO] [stderr]    Compiling slab v0.4.12
[INFO] [stderr]    Compiling futures-task v0.3.32
[INFO] [stderr]    Compiling memchr v2.8.0
[INFO] [stderr]    Compiling futures-io v0.3.32
[INFO] [stderr]    Compiling pin-project-lite v0.2.17
[INFO] [stderr]    Compiling futures-channel v0.3.32
[INFO] [stderr]    Compiling futures-util v0.3.32
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling futures v0.3.32
[INFO] [stderr]    Compiling pin-project-internal v1.1.11
[INFO] [stderr]    Compiling pin-project v1.1.11
[INFO] [stderr]    Compiling foreback v1.1.2
[INFO] [stderr]    Compiling plumbing v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.83s
[INFO] running `Command { std: "docker" "inspect" "7267ee1d5cddf410247e7123e11aa69300e721ec76b6cc868dd4e43c7e9e66c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7267ee1d5cddf410247e7123e11aa69300e721ec76b6cc868dd4e43c7e9e66c3", kill_on_drop: false }`
[INFO] [stdout] 7267ee1d5cddf410247e7123e11aa69300e721ec76b6cc868dd4e43c7e9e66c3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a2d5d9fbf6c521573002eaa615a6bd7efbfbcb59278251777ed32d1102256170
[INFO] running `Command { std: "docker" "start" "-a" "a2d5d9fbf6c521573002eaa615a6bd7efbfbcb59278251777ed32d1102256170", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.185
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling pin-project-lite v0.1.12
[INFO] [stderr]    Compiling bytes v0.5.6
[INFO] [stderr]    Compiling num_cpus v1.17.0
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stderr]    Compiling tokio v0.2.25
[INFO] [stderr]    Compiling plumbing v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused output of future returned by `tokio::task::yield_now` that must be used
[INFO] [stdout]   --> tests/test.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 |     task::yield_now().await;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: yield_now does nothing unless polled/`await`-ed
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 92 |     let _ = task::yield_now().await;
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused output of future returned by `tokio::task::yield_now` that must be used
[INFO] [stdout]   --> tests/test.rs:93:5
[INFO] [stdout]    |
[INFO] [stdout] 93 |     task::yield_now().await;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: yield_now does nothing unless polled/`await`-ed
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 93 |     let _ = task::yield_now().await;
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 9.60s
[INFO] running `Command { std: "docker" "inspect" "a2d5d9fbf6c521573002eaa615a6bd7efbfbcb59278251777ed32d1102256170", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2d5d9fbf6c521573002eaa615a6bd7efbfbcb59278251777ed32d1102256170", kill_on_drop: false }`
[INFO] [stdout] a2d5d9fbf6c521573002eaa615a6bd7efbfbcb59278251777ed32d1102256170
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c9b466356e95f8acbeb0e166cf4ba4cfe827e48df6a316aea9078d66d02a9567
[INFO] running `Command { std: "docker" "start" "-a" "c9b466356e95f8acbeb0e166cf4ba4cfe827e48df6a316aea9078d66d02a9567", kill_on_drop: false }`
[INFO] [stderr] warning: unused output of future returned by `tokio::task::yield_now` that must be used
[INFO] [stderr]   --> tests/test.rs:92:5
[INFO] [stderr]    |
[INFO] [stderr] 92 |     task::yield_now().await;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: yield_now does nothing unless polled/`await`-ed
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 92 |     let _ = task::yield_now().await;
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused output of future returned by `tokio::task::yield_now` that must be used
[INFO] [stderr]   --> tests/test.rs:93:5
[INFO] [stderr]    |
[INFO] [stderr] 93 |     task::yield_now().await;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: yield_now does nothing unless polled/`await`-ed
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 93 |     let _ = task::yield_now().await;
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `plumbing` (test "test") generated 2 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/plumbing-78fdb83192d2041f)
[INFO] [stderr]      Running tests/test.rs (/opt/rustwide/target/debug/deps/test-964fc7828cadc142)
[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] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test drop_test ... ok
[INFO] [stdout] test fake_db_test::test_fake_db ... ok
[INFO] [stdout] test fake_db_test::test_fake_db_two_queries ... ok
[INFO] [stdout] test ordering_test ... ok
[INFO] [stdout] test test_dangling_tail ... ok
[INFO] [stdout] test test_drain ... ok
[INFO] [stdout] test test_owned_drop_chain ... ok
[INFO] [stdout] test test_none_propagation ... ok
[INFO] [stdout] test basic_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.07s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests plumbing
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 38) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.82s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c9b466356e95f8acbeb0e166cf4ba4cfe827e48df6a316aea9078d66d02a9567", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9b466356e95f8acbeb0e166cf4ba4cfe827e48df6a316aea9078d66d02a9567", kill_on_drop: false }`
[INFO] [stdout] c9b466356e95f8acbeb0e166cf4ba4cfe827e48df6a316aea9078d66d02a9567