[INFO] cloning repository https://github.com/alexmullins/echo-client
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alexmullins/echo-client" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexmullins%2Fecho-client", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexmullins%2Fecho-client'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 707cb0447581dafc86dce1c8cb778414705d3e82
[INFO] checking alexmullins/echo-client against try#1f308f12738d8cc40bb23bf0c8114b37c164bb49 for pr-137268
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexmullins%2Fecho-client" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alexmullins/echo-client on toolchain 1f308f12738d8cc40bb23bf0c8114b37c164bb49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f308f12738d8cc40bb23bf0c8114b37c164bb49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/alexmullins/echo-client
[INFO] finished tweaking git repo https://github.com/alexmullins/echo-client
[INFO] tweaked toml for git repo https://github.com/alexmullins/echo-client written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/alexmullins/echo-client 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" "+1f308f12738d8cc40bb23bf0c8114b37c164bb49" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+1f308f12738d8cc40bb23bf0c8114b37c164bb49" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 46d17281e846e9b7b673570b8924542cbd753bc0b6f2f0d0787f9ab73bd5c1c6
[INFO] running `Command { std: "docker" "start" "-a" "46d17281e846e9b7b673570b8924542cbd753bc0b6f2f0d0787f9ab73bd5c1c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "46d17281e846e9b7b673570b8924542cbd753bc0b6f2f0d0787f9ab73bd5c1c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46d17281e846e9b7b673570b8924542cbd753bc0b6f2f0d0787f9ab73bd5c1c6", kill_on_drop: false }`
[INFO] [stdout] 46d17281e846e9b7b673570b8924542cbd753bc0b6f2f0d0787f9ab73bd5c1c6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+1f308f12738d8cc40bb23bf0c8114b37c164bb49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 35d1f9ccacb133a67f67e612fabb6c8ab9971cb23addfad97ce0e8d070f2ff1c
[INFO] running `Command { std: "docker" "start" "-a" "35d1f9ccacb133a67f67e612fabb6c8ab9971cb23addfad97ce0e8d070f2ff1c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.19
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling cc v1.0.25
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]    Compiling failure_derive v0.1.2
[INFO] [stderr]     Checking cfg-if v0.1.5
[INFO] [stderr]     Checking rustc-demangle v0.1.9
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]    Compiling synstructure v0.9.0
[INFO] [stderr]     Checking failure v0.1.2
[INFO] [stderr]     Checking echo-client v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.56s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.14.9
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "35d1f9ccacb133a67f67e612fabb6c8ab9971cb23addfad97ce0e8d070f2ff1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35d1f9ccacb133a67f67e612fabb6c8ab9971cb23addfad97ce0e8d070f2ff1c", kill_on_drop: false }`
[INFO] [stdout] 35d1f9ccacb133a67f67e612fabb6c8ab9971cb23addfad97ce0e8d070f2ff1c