[INFO] cloning repository https://github.com/kamijin-fanta/rust-sandbox-memcached
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kamijin-fanta/rust-sandbox-memcached" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkamijin-fanta%2Frust-sandbox-memcached", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkamijin-fanta%2Frust-sandbox-memcached'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b48b4dc4811a919e9dd3b231779220bf626c169e
[INFO] checking kamijin-fanta/rust-sandbox-memcached against try#22cc29ba5b459fb386c0406b9baf3a49eb0fba39 for pr-146095
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkamijin-fanta%2Frust-sandbox-memcached" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kamijin-fanta/rust-sandbox-memcached
[INFO] finished tweaking git repo https://github.com/kamijin-fanta/rust-sandbox-memcached
[INFO] tweaked toml for git repo https://github.com/kamijin-fanta/rust-sandbox-memcached written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kamijin-fanta/rust-sandbox-memcached on toolchain 22cc29ba5b459fb386c0406b9baf3a49eb0fba39
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22cc29ba5b459fb386c0406b9baf3a49eb0fba39" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kamijin-fanta/rust-sandbox-memcached 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" "+22cc29ba5b459fb386c0406b9baf3a49eb0fba39" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-byteorder v0.3.0
[INFO] [stderr]   Downloaded libc v0.2.117
[INFO] [stderr]   Downloaded tokio v1.16.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+22cc29ba5b459fb386c0406b9baf3a49eb0fba39" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 433211ff6212a8e2e4506bfcc9c018cc8c9f002393b554eaa22d51cf4bbb7c1a
[INFO] running `Command { std: "docker" "start" "-a" "433211ff6212a8e2e4506bfcc9c018cc8c9f002393b554eaa22d51cf4bbb7c1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "433211ff6212a8e2e4506bfcc9c018cc8c9f002393b554eaa22d51cf4bbb7c1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "433211ff6212a8e2e4506bfcc9c018cc8c9f002393b554eaa22d51cf4bbb7c1a", kill_on_drop: false }`
[INFO] [stdout] 433211ff6212a8e2e4506bfcc9c018cc8c9f002393b554eaa22d51cf4bbb7c1a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+22cc29ba5b459fb386c0406b9baf3a49eb0fba39" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a5d5251923b570c7cc65833ce3028df5b3d1bd7024138dd39cc126e9e70332d
[INFO] running `Command { std: "docker" "start" "-a" "9a5d5251923b570c7cc65833ce3028df5b3d1bd7024138dd39cc126e9e70332d", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling libc v0.2.117
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]     Checking tokio v1.16.1
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling proc-macro-crate v1.1.3
[INFO] [stderr]    Compiling num_enum_derive v0.5.7
[INFO] [stderr]     Checking num_enum v0.5.7
[INFO] [stderr]     Checking tokio-byteorder v0.3.0
[INFO] [stderr]     Checking ascii v0.1.0 (/opt/rustwide/workdir/ascii)
[INFO] [stderr]     Checking binary v0.1.0 (/opt/rustwide/workdir/binary)
[INFO] [stdout] warning: unused extern crate
[INFO] [stdout]  --> binary/src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | extern crate core;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^ unused
[INFO] [stdout]   |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]  --> binary/src/main.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![warn(rust_2018_idioms)]
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]   = note: `#[warn(unused_extern_crates)]` implied by `#[warn(rust_2018_idioms)]`
[INFO] [stdout] help: remove the unused `extern crate`
[INFO] [stdout]   |
[INFO] [stdout] 3 - extern crate core;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused extern crate
[INFO] [stdout]  --> binary/src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | extern crate core;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^ unused
[INFO] [stdout]   |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]  --> binary/src/main.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![warn(rust_2018_idioms)]
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]   = note: `#[warn(unused_extern_crates)]` implied by `#[warn(rust_2018_idioms)]`
[INFO] [stdout] help: remove the unused `extern crate`
[INFO] [stdout]   |
[INFO] [stdout] 3 - extern crate core;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.10s
[INFO] running `Command { std: "docker" "inspect" "9a5d5251923b570c7cc65833ce3028df5b3d1bd7024138dd39cc126e9e70332d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a5d5251923b570c7cc65833ce3028df5b3d1bd7024138dd39cc126e9e70332d", kill_on_drop: false }`
[INFO] [stdout] 9a5d5251923b570c7cc65833ce3028df5b3d1bd7024138dd39cc126e9e70332d