[INFO] cloning repository https://github.com/daogangtang/learn-tokio
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/daogangtang/learn-tokio" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdaogangtang%2Flearn-tokio", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdaogangtang%2Flearn-tokio'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 98b13be0e474ffb1b6a4f84b3e9caa91d100296a
[INFO] checking daogangtang/learn-tokio against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdaogangtang%2Flearn-tokio" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/daogangtang/learn-tokio 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 git repo https://github.com/daogangtang/learn-tokio
[INFO] finished tweaking git repo https://github.com/daogangtang/learn-tokio
[INFO] tweaked toml for git repo https://github.com/daogangtang/learn-tokio written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate git repo https://github.com/daogangtang/learn-tokio 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]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] ebafb464dfe40844412a9336ba45254802d917c8c2855ed8a14d13525ec2d002
[INFO] running `Command { std: "docker" "start" "-a" "ebafb464dfe40844412a9336ba45254802d917c8c2855ed8a14d13525ec2d002", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ebafb464dfe40844412a9336ba45254802d917c8c2855ed8a14d13525ec2d002", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebafb464dfe40844412a9336ba45254802d917c8c2855ed8a14d13525ec2d002", kill_on_drop: false }`
[INFO] [stdout] ebafb464dfe40844412a9336ba45254802d917c8c2855ed8a14d13525ec2d002
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] 39339bd52c036927b9b227fe7c095fce86502d24f8ec40dacbb8bc8ae55705be
[INFO] running `Command { std: "docker" "start" "-a" "39339bd52c036927b9b227fe7c095fce86502d24f8ec40dacbb8bc8ae55705be", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]     Checking cfg-if v0.1.6
[INFO] [stderr]     Checking futures v0.1.25
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking crossbeam-utils v0.5.0
[INFO] [stderr]     Checking lazy_static v1.2.0
[INFO] [stderr]     Checking byteorder v1.2.7
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking slab v0.4.1
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking lazycell v1.2.0
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking smallvec v0.6.5
[INFO] [stderr]     Checking lock_api v0.1.4
[INFO] [stderr]     Checking rand_core v0.2.2
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking crossbeam-epoch v0.5.2
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking bytes v0.4.10
[INFO] [stderr]     Checking crossbeam-deque v0.6.1
[INFO] [stderr]     Checking mio v0.6.16
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]     Checking tokio-executor v0.1.5
[INFO] [stderr]     Checking tokio-io v0.1.10
[INFO] [stderr]     Checking tokio-timer v0.2.7
[INFO] [stderr]     Checking tokio-current-thread v0.1.3
[INFO] [stderr]     Checking tokio-codec v0.1.1
[INFO] [stderr]     Checking tokio-threadpool v0.1.8
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking tokio-fs v0.1.4
[INFO] [stderr]     Checking tokio-reactor v0.1.6
[INFO] [stderr]     Checking tokio-udp v0.1.2
[INFO] [stderr]     Checking tokio-tcp v0.1.2
[INFO] [stderr]     Checking tokio-uds v0.2.3
[INFO] [stderr]     Checking tokio v0.1.11
[INFO] [stderr]     Checking learn-tokio0 v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/tcp_server3.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/delay_print.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/tcp_client.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/delay_seq_print.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/print_each_packet.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/concurrent_send_recv2.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/futures_select.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/print_lines.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/tcp_server.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/interval_print.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/echo_udp.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/concurrent_interval_print.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/concurrent_send_recv.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed src/tcp_server3.rs (1 fix)
[INFO] [stderr]        Fixed src/tcp_client.rs (2 fixes)
[INFO] [stderr]        Fixed src/concurrent_send_recv2.rs (1 fix)
[INFO] [stderr]        Fixed src/tcp_server.rs (2 fixes)
[INFO] [stdout] warning: unused import: `tokio::prelude`
[INFO] [stdout]  --> src/tcp_server.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use tokio::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::prelude`
[INFO] [stdout]  --> src/tcp_server.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use tokio::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed src/concurrent_send_recv.rs (1 fix)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.29s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Checking learn-tokio0 v0.1.0 (/tmp/fixit)
[INFO] [stdout] warning: unused import: `tokio::prelude`
[INFO] [stdout]  --> src/tcp_server.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use tokio::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::prelude`
[INFO] [stdout]  --> src/tcp_server.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use tokio::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `Command { std: "docker" "inspect" "39339bd52c036927b9b227fe7c095fce86502d24f8ec40dacbb8bc8ae55705be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39339bd52c036927b9b227fe7c095fce86502d24f8ec40dacbb8bc8ae55705be", kill_on_drop: false }`
[INFO] [stdout] 39339bd52c036927b9b227fe7c095fce86502d24f8ec40dacbb8bc8ae55705be