[INFO] fetching crate mpool 0.1.4...
[INFO] checking mpool-0.1.4 against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] extracting crate mpool 0.1.4 into /workspace/builds/worker-19/source
[INFO] validating manifest of crates.io crate mpool 0.1.4 on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mpool 0.1.4
[INFO] finished tweaking crates.io crate mpool 0.1.4
[INFO] tweaked toml for crates.io crate mpool 0.1.4 written to /workspace/builds/worker-19/source/Cargo.toml
[INFO] crate crates.io crate mpool 0.1.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded async-trait v0.1.24
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cb135101b1d7a65ea5e036a8c6ce46b7975e90a43fc902ea8f11fccf7c48769f
[INFO] running `Command { std: "docker" "start" "-a" "cb135101b1d7a65ea5e036a8c6ce46b7975e90a43fc902ea8f11fccf7c48769f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb135101b1d7a65ea5e036a8c6ce46b7975e90a43fc902ea8f11fccf7c48769f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb135101b1d7a65ea5e036a8c6ce46b7975e90a43fc902ea8f11fccf7c48769f", kill_on_drop: false }`
[INFO] [stdout] cb135101b1d7a65ea5e036a8c6ce46b7975e90a43fc902ea8f11fccf7c48769f
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a78d691588cb1538d69784872226bb7ed84a0c02f4aefedf2e00aa54d3f14f8d
[INFO] running `Command { std: "docker" "start" "-a" "a78d691588cb1538d69784872226bb7ed84a0c02f4aefedf2e00aa54d3f14f8d", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr] note: Switching to Edition 2021 will enable the use of the version 2 feature resolver in Cargo.
[INFO] [stderr] This may cause some dependencies to be built with fewer features enabled than previously.
[INFO] [stderr] More information about the resolver changes may be found at https://doc.rust-lang.org/nightly/edition-guide/rust-2021/default-cargo-resolver.html
[INFO] [stderr] When building the following dependencies, the given features will no longer be used:
[INFO] [stderr] 
[INFO] [stderr]   tokio v0.2.13: blocking, dns, fnv, fs, full, futures-core, io-driver, io-std, io-util, iovec, lazy_static, libc, macros, memchr, mio, mio-named-pipes, mio-uds, net, num_cpus, process, rt-threaded, rt-util, signal, signal-hook-registry, stream, sync, tcp, tokio-macros, udp, uds, winapi
[INFO] [stderr] 
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking arc-swap v0.4.4
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling async-trait v0.1.24
[INFO] [stderr]     Checking tokio v0.2.13
[INFO] [stderr]     Checking mpool v0.1.4 (/tmp/fixit)
[INFO] [stderr]    Migrating src/lib.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/basic.rs from 2018 edition to 2021
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.87s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Checking tokio v0.2.13
[INFO] [stderr]     Checking mpool v0.1.4 (/tmp/fixit)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.78s
[INFO] running `Command { std: "docker" "inspect" "a78d691588cb1538d69784872226bb7ed84a0c02f4aefedf2e00aa54d3f14f8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a78d691588cb1538d69784872226bb7ed84a0c02f4aefedf2e00aa54d3f14f8d", kill_on_drop: false }`
[INFO] [stdout] a78d691588cb1538d69784872226bb7ed84a0c02f4aefedf2e00aa54d3f14f8d