[INFO] fetching crate tractor 0.0.6...
[INFO] testing tractor-0.0.6 against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] extracting crate tractor 0.0.6 into /workspace/builds/worker-19/source
[INFO] validating manifest of crates.io crate tractor 0.0.6 on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tractor 0.0.6
[INFO] finished tweaking crates.io crate tractor 0.0.6
[INFO] tweaked toml for crates.io crate tractor 0.0.6 written to /workspace/builds/worker-19/source/Cargo.toml
[INFO] crate crates.io crate tractor 0.0.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] afa343093334e7cca727228a814d1b3c2334a4ef74fd472c5e0fe7aabb42d0f1
[INFO] running `Command { std: "docker" "start" "-a" "afa343093334e7cca727228a814d1b3c2334a4ef74fd472c5e0fe7aabb42d0f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "afa343093334e7cca727228a814d1b3c2334a4ef74fd472c5e0fe7aabb42d0f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afa343093334e7cca727228a814d1b3c2334a4ef74fd472c5e0fe7aabb42d0f1", kill_on_drop: false }`
[INFO] [stdout] afa343093334e7cca727228a814d1b3c2334a4ef74fd472c5e0fe7aabb42d0f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dac52ae4edc45a3ed3b20f4f86ebfd7cd4f9cf5e060db20a5ef54500be4e6822
[INFO] running `Command { std: "docker" "start" "-a" "dac52ae4edc45a3ed3b20f4f86ebfd7cd4f9cf5e060db20a5ef54500be4e6822", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling libc v0.2.87
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling futures-core v0.3.13
[INFO] [stderr]    Compiling pin-project-lite v0.2.6
[INFO] [stderr]    Compiling bytes v1.0.1
[INFO] [stderr]    Compiling futures-sink v0.3.13
[INFO] [stderr]    Compiling once_cell v1.7.2
[INFO] [stderr]    Compiling lock_api v0.4.2
[INFO] [stderr]    Compiling instant v0.1.9
[INFO] [stderr]    Compiling tokio v1.2.0
[INFO] [stderr]    Compiling spinning_top v0.2.2
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling signal-hook-registry v1.3.0
[INFO] [stderr]    Compiling mio v0.7.9
[INFO] [stderr]    Compiling nanorand v0.5.2
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling pin-project-internal v1.0.5
[INFO] [stderr]    Compiling tokio-macros v1.1.0
[INFO] [stderr]    Compiling tractor-macros v0.0.6
[INFO] [stderr]    Compiling async-trait v0.1.42
[INFO] [stderr]    Compiling pin-project v1.0.5
[INFO] [stderr]    Compiling flume v0.10.2
[INFO] [stderr]    Compiling tractor v0.0.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.82s
[INFO] running `Command { std: "docker" "inspect" "dac52ae4edc45a3ed3b20f4f86ebfd7cd4f9cf5e060db20a5ef54500be4e6822", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dac52ae4edc45a3ed3b20f4f86ebfd7cd4f9cf5e060db20a5ef54500be4e6822", kill_on_drop: false }`
[INFO] [stdout] dac52ae4edc45a3ed3b20f4f86ebfd7cd4f9cf5e060db20a5ef54500be4e6822
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f3426c9e2876198064ccc2f044590e62a5c8f4e0f865562c5b9ee97ab4c5b53
[INFO] running `Command { std: "docker" "start" "-a" "6f3426c9e2876198064ccc2f044590e62a5c8f4e0f865562c5b9ee97ab4c5b53", kill_on_drop: false }`
[INFO] [stderr]    Compiling tractor v0.0.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `Sub`
[INFO] [stdout]   --> examples/accumulator.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Sub { a: usize },
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `sub`
[INFO] [stdout]   --> examples/accumulator.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn sub(&self, a: usize) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Sub`
[INFO] [stdout]   --> examples/async_accumulator.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Sub { a: usize },
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `sub`
[INFO] [stdout]   --> examples/async_accumulator.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 |     fn sub(&self, a: usize) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.58s
[INFO] running `Command { std: "docker" "inspect" "6f3426c9e2876198064ccc2f044590e62a5c8f4e0f865562c5b9ee97ab4c5b53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f3426c9e2876198064ccc2f044590e62a5c8f4e0f865562c5b9ee97ab4c5b53", kill_on_drop: false }`
[INFO] [stdout] 6f3426c9e2876198064ccc2f044590e62a5c8f4e0f865562c5b9ee97ab4c5b53
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a34fe7e097c4b977638c6ab032341a9efd84606eff137c004bd0f357ab67086e
[INFO] running `Command { std: "docker" "start" "-a" "a34fe7e097c4b977638c6ab032341a9efd84606eff137c004bd0f357ab67086e", kill_on_drop: false }`
[INFO] [stderr] warning: variant is never constructed: `Sub`
[INFO] [stderr]   --> examples/accumulator.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     Sub { a: usize },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `sub`
[INFO] [stderr]   --> examples/accumulator.rs:45:8
[INFO] [stderr]    |
[INFO] [stderr] 45 |     fn sub(&self, a: usize) {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Sub`
[INFO] [stderr]   --> examples/async_accumulator.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     Sub { a: usize },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `sub`
[INFO] [stderr]   --> examples/async_accumulator.rs:48:8
[INFO] [stderr]    |
[INFO] [stderr] 48 |     fn sub(&self, a: usize) {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `tractor` (example "accumulator") generated 2 warnings
[INFO] [stderr] warning: `tractor` (example "async_accumulator") generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.49s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/tractor-23df6ca694a6c526)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests tractor
[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 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" "a34fe7e097c4b977638c6ab032341a9efd84606eff137c004bd0f357ab67086e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a34fe7e097c4b977638c6ab032341a9efd84606eff137c004bd0f357ab67086e", kill_on_drop: false }`
[INFO] [stdout] a34fe7e097c4b977638c6ab032341a9efd84606eff137c004bd0f357ab67086e