[INFO] fetching crate tractor 0.0.6...
[INFO] testing tractor-0.0.6 against 1.91.0 for beta-1.92-2
[INFO] extracting crate tractor 0.0.6 into /workspace/builds/worker-5-tc1/source
[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-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate tractor 0.0.6 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate tractor 0.0.6 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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tractor-macros v0.0.6
[INFO] [stderr]   Downloaded heck v0.3.2
[INFO] [stderr]   Downloaded futures-sink v0.3.13
[INFO] [stderr]   Downloaded tokio-macros v1.1.0
[INFO] [stderr]   Downloaded futures-core v0.3.13
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[INFO] [stderr]   Downloaded async-trait v0.1.42
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.71
[INFO] [stderr]   Downloaded pin-project v1.0.5
[INFO] [stderr]   Downloaded js-sys v0.3.48
[INFO] [stderr]   Downloaded mio v0.7.9
[INFO] [stderr]   Downloaded flume v0.10.2
[INFO] [stderr]   Downloaded spinning_top v0.2.2
[INFO] [stderr]   Downloaded bumpalo v3.6.1
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.71
[INFO] [stderr]   Downloaded bytes v1.0.1
[INFO] [stderr]   Downloaded getrandom v0.2.2
[INFO] [stderr]   Downloaded pin-project-internal v1.0.5
[INFO] [stderr]   Downloaded once_cell v1.7.2
[INFO] [stderr]   Downloaded redox_syscall v0.2.5
[INFO] [stderr]   Downloaded smallvec v1.6.1
[INFO] [stderr]   Downloaded parking_lot v0.11.1
[INFO] [stderr]   Downloaded pin-project-lite v0.2.6
[INFO] [stderr]   Downloaded unicode-segmentation v1.7.1
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.71
[INFO] [stderr]   Downloaded miow v0.3.6
[INFO] [stderr]   Downloaded tokio v1.2.0
[INFO] [stderr]   Downloaded hermit-abi v0.1.18
[INFO] [stderr]   Downloaded lock_api v0.4.2
[INFO] [stderr]   Downloaded instant v0.1.9
[INFO] [stderr]   Downloaded parking_lot_core v0.8.3
[INFO] [stderr]   Downloaded signal-hook-registry v1.3.0
[INFO] [stderr]   Downloaded libc v0.2.87
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3e699472c9f1eefcdc4dea33f32c49f7ff7b40a08e6548a39239adf974376c1d
[INFO] running `Command { std: "docker" "start" "-a" "3e699472c9f1eefcdc4dea33f32c49f7ff7b40a08e6548a39239adf974376c1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e699472c9f1eefcdc4dea33f32c49f7ff7b40a08e6548a39239adf974376c1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e699472c9f1eefcdc4dea33f32c49f7ff7b40a08e6548a39239adf974376c1d", kill_on_drop: false }`
[INFO] [stdout] 3e699472c9f1eefcdc4dea33f32c49f7ff7b40a08e6548a39239adf974376c1d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6fe43047f16a77035fbd35e89abb5503d34fd20b719b88a3083ee7a337449a0a
[INFO] running `Command { std: "docker" "start" "-a" "6fe43047f16a77035fbd35e89abb5503d34fd20b719b88a3083ee7a337449a0a", 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 log v0.4.14
[INFO] [stderr]    Compiling smallvec v1.6.1
[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 once_cell v1.7.2
[INFO] [stderr]    Compiling bytes v1.0.1
[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 futures-sink v0.3.13
[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 async-trait v0.1.42
[INFO] [stderr]    Compiling tractor-macros v0.0.6
[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` profile [unoptimized + debuginfo] target(s) in 14.00s
[INFO] running `Command { std: "docker" "inspect" "6fe43047f16a77035fbd35e89abb5503d34fd20b719b88a3083ee7a337449a0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6fe43047f16a77035fbd35e89abb5503d34fd20b719b88a3083ee7a337449a0a", kill_on_drop: false }`
[INFO] [stdout] 6fe43047f16a77035fbd35e89abb5503d34fd20b719b88a3083ee7a337449a0a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.91.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 558078bab31dd520e18f7161909d66b7cd68e12a3a681685b7989344555a4a6b
[INFO] running `Command { std: "docker" "start" "-a" "558078bab31dd520e18f7161909d66b7cd68e12a3a681685b7989344555a4a6b", kill_on_drop: false }`
[INFO] [stderr]    Compiling tractor v0.0.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `Sub` is never constructed
[INFO] [stdout]   --> examples/async_accumulator.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum AccumulatorMsg {
[INFO] [stdout]    |      -------------- variant in this enum
[INFO] [stdout] 11 |     Add { a: usize },
[INFO] [stdout] 12 |     Sub { a: usize },
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `sub` is never used
[INFO] [stdout]   --> examples/async_accumulator.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | impl Accum {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 48 |     fn sub(&self, a: usize) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Sub` is never constructed
[INFO] [stdout]   --> examples/accumulator.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | enum AccumulatorMsg {
[INFO] [stdout]    |      -------------- variant in this enum
[INFO] [stdout] 10 |     Add { a: usize },
[INFO] [stdout] 11 |     Sub { a: usize },
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `sub` is never used
[INFO] [stdout]   --> examples/accumulator.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | impl Accum {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 45 |     fn sub(&self, a: usize) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.67s
[INFO] running `Command { std: "docker" "inspect" "558078bab31dd520e18f7161909d66b7cd68e12a3a681685b7989344555a4a6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "558078bab31dd520e18f7161909d66b7cd68e12a3a681685b7989344555a4a6b", kill_on_drop: false }`
[INFO] [stdout] 558078bab31dd520e18f7161909d66b7cd68e12a3a681685b7989344555a4a6b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.91.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6dbfe49197a8d64a6cd08cc6e76d323baf6968c02973a965eb4f0f12a97fb9d0
[INFO] running `Command { std: "docker" "start" "-a" "6dbfe49197a8d64a6cd08cc6e76d323baf6968c02973a965eb4f0f12a97fb9d0", kill_on_drop: false }`
[INFO] [stderr] warning: variant `Sub` is never constructed
[INFO] [stderr]   --> examples/accumulator.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr]  9 | enum AccumulatorMsg {
[INFO] [stderr]    |      -------------- variant in this enum
[INFO] [stderr] 10 |     Add { a: usize },
[INFO] [stderr] 11 |     Sub { a: usize },
[INFO] [stderr]    |     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `sub` is never used
[INFO] [stderr]   --> examples/accumulator.rs:45:8
[INFO] [stderr]    |
[INFO] [stderr] 36 | impl Accum {
[INFO] [stderr]    | ---------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 45 |     fn sub(&self, a: usize) {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `Sub` is never constructed
[INFO] [stderr]   --> examples/async_accumulator.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | enum AccumulatorMsg {
[INFO] [stderr]    |      -------------- variant in this enum
[INFO] [stderr] 11 |     Add { a: usize },
[INFO] [stderr] 12 |     Sub { a: usize },
[INFO] [stderr]    |     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `sub` is never used
[INFO] [stderr]   --> examples/async_accumulator.rs:48:8
[INFO] [stderr]    |
[INFO] [stderr] 39 | impl Accum {
[INFO] [stderr]    | ---------- method in this implementation
[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` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/tractor-e07a11bda07d1a44)
[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] [stderr]    Doc-tests tractor
[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" "6dbfe49197a8d64a6cd08cc6e76d323baf6968c02973a965eb4f0f12a97fb9d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6dbfe49197a8d64a6cd08cc6e76d323baf6968c02973a965eb4f0f12a97fb9d0", kill_on_drop: false }`
[INFO] [stdout] 6dbfe49197a8d64a6cd08cc6e76d323baf6968c02973a965eb4f0f12a97fb9d0