[INFO] fetching crate concurrency 4.20.1...
[INFO] testing concurrency-4.20.1 against try#d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2 for pr-86479
[INFO] extracting crate concurrency 4.20.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate concurrency 4.20.1 on toolchain d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate concurrency 4.20.1
[INFO] finished tweaking crates.io crate concurrency 4.20.1
[INFO] tweaked toml for crates.io crate concurrency 4.20.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate concurrency 4.20.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fc6eddf6bc63153897629c2f40348bd8d8b4b98170cc700617bd10caed24c8b4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "fc6eddf6bc63153897629c2f40348bd8d8b4b98170cc700617bd10caed24c8b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc6eddf6bc63153897629c2f40348bd8d8b4b98170cc700617bd10caed24c8b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc6eddf6bc63153897629c2f40348bd8d8b4b98170cc700617bd10caed24c8b4", kill_on_drop: false }`
[INFO] [stdout] fc6eddf6bc63153897629c2f40348bd8d8b4b98170cc700617bd10caed24c8b4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5ac0921aa3daf141a4330dfb283acaa1bfa66524c8dbac8ab8ffd61c1c3f6906
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5ac0921aa3daf141a4330dfb283acaa1bfa66524c8dbac8ab8ffd61c1c3f6906", kill_on_drop: false }`
[INFO] [stderr]    Compiling concurrency v4.20.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `Command { std: "docker" "inspect" "5ac0921aa3daf141a4330dfb283acaa1bfa66524c8dbac8ab8ffd61c1c3f6906", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ac0921aa3daf141a4330dfb283acaa1bfa66524c8dbac8ab8ffd61c1c3f6906", kill_on_drop: false }`
[INFO] [stdout] 5ac0921aa3daf141a4330dfb283acaa1bfa66524c8dbac8ab8ffd61c1c3f6906
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 50129683078ff978ed4c52782fc93b6f4dbf3f6d2ab1233c8a09b0e2fa6abe69
[INFO] running `Command { std: "docker" "start" "-a" "50129683078ff978ed4c52782fc93b6f4dbf3f6d2ab1233c8a09b0e2fa6abe69", kill_on_drop: false }`
[INFO] [stderr]    Compiling concurrency v4.20.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "50129683078ff978ed4c52782fc93b6f4dbf3f6d2ab1233c8a09b0e2fa6abe69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50129683078ff978ed4c52782fc93b6f4dbf3f6d2ab1233c8a09b0e2fa6abe69", kill_on_drop: false }`
[INFO] [stdout] 50129683078ff978ed4c52782fc93b6f4dbf3f6d2ab1233c8a09b0e2fa6abe69
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] aeb0fdb93e3d0f4fb55e004fac0e94367aa0b0887ef98dc042ecc2cc19967335
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "aeb0fdb93e3d0f4fb55e004fac0e94367aa0b0887ef98dc042ecc2cc19967335", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.15s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/concurrency-0e487474c33ca04f)
[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" "aeb0fdb93e3d0f4fb55e004fac0e94367aa0b0887ef98dc042ecc2cc19967335", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aeb0fdb93e3d0f4fb55e004fac0e94367aa0b0887ef98dc042ecc2cc19967335", kill_on_drop: false }`
[INFO] [stdout] aeb0fdb93e3d0f4fb55e004fac0e94367aa0b0887ef98dc042ecc2cc19967335