[INFO] fetching crate tractor 0.0.6...
[INFO] testing tractor-0.0.6 against try#b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b for pr-145330-1
[INFO] extracting crate tractor 0.0.6 into /workspace/builds/worker-1-tc2/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-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tractor 0.0.6 on toolchain b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "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" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 207007d3e586eada837a5ac39014a01e41c3475791d9eec1c122e2a544590e3a
[INFO] running `Command { std: "docker" "start" "-a" "207007d3e586eada837a5ac39014a01e41c3475791d9eec1c122e2a544590e3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "207007d3e586eada837a5ac39014a01e41c3475791d9eec1c122e2a544590e3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "207007d3e586eada837a5ac39014a01e41c3475791d9eec1c122e2a544590e3a", kill_on_drop: false }`
[INFO] [stdout] 207007d3e586eada837a5ac39014a01e41c3475791d9eec1c122e2a544590e3a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 89ec4104dbf3a6a17f673e7b62fe6ce9930ac0bfc1d0dd257ed5af149349d223
[INFO] running `Command { std: "docker" "start" "-a" "89ec4104dbf3a6a17f673e7b62fe6ce9930ac0bfc1d0dd257ed5af149349d223", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.87
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling futures-core v0.3.13
[INFO] [stderr]    Compiling futures-sink v0.3.13
[INFO] [stderr]    Compiling once_cell v1.7.2
[INFO] [stderr]    Compiling bytes v1.0.1
[INFO] [stderr]    Compiling pin-project-lite v0.2.6
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling spinning_top v0.2.2
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling tokio v1.2.0
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling mio v0.7.9
[INFO] [stderr]    Compiling signal-hook-registry v1.3.0
[INFO] [stderr]    Compiling num_cpus v1.13.0
[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` profile [unoptimized + debuginfo] target(s) in 13.14s
[INFO] running `Command { std: "docker" "inspect" "89ec4104dbf3a6a17f673e7b62fe6ce9930ac0bfc1d0dd257ed5af149349d223", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89ec4104dbf3a6a17f673e7b62fe6ce9930ac0bfc1d0dd257ed5af149349d223", kill_on_drop: false }`
[INFO] [stdout] 89ec4104dbf3a6a17f673e7b62fe6ce9930ac0bfc1d0dd257ed5af149349d223
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7fa1cce656430b1eb4465c2af025088675ec1fde58e19e89d8167e6e55462705
[INFO] running `Command { std: "docker" "start" "-a" "7fa1cce656430b1eb4465c2af025088675ec1fde58e19e89d8167e6e55462705", 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)]` 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)]` 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 1.66s
[INFO] running `Command { std: "docker" "inspect" "7fa1cce656430b1eb4465c2af025088675ec1fde58e19e89d8167e6e55462705", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fa1cce656430b1eb4465c2af025088675ec1fde58e19e89d8167e6e55462705", kill_on_drop: false }`
[INFO] [stdout] 7fa1cce656430b1eb4465c2af025088675ec1fde58e19e89d8167e6e55462705
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c4b0192ba5a0281068daa5c4ef116debfee771aeb3fdb14d1868cd1dad4f2b51
[INFO] running `Command { std: "docker" "start" "-a" "c4b0192ba5a0281068daa5c4ef116debfee771aeb3fdb14d1868cd1dad4f2b51", 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)]` 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: `tractor` (example "accumulator") generated 2 warnings
[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)]` 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 "async_accumulator") generated 2 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/tractor-f0ccf45b6f428fb4)
[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" "c4b0192ba5a0281068daa5c4ef116debfee771aeb3fdb14d1868cd1dad4f2b51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4b0192ba5a0281068daa5c4ef116debfee771aeb3fdb14d1868cd1dad4f2b51", kill_on_drop: false }`
[INFO] [stdout] c4b0192ba5a0281068daa5c4ef116debfee771aeb3fdb14d1868cd1dad4f2b51