[INFO] cloning repository https://github.com/motss/learning-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/motss/learning-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmotss%2Flearning-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmotss%2Flearning-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ba8b1604551ac72a4b3e93a0ed2de3e5ae9f6621
[INFO] checking motss/learning-rust against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmotss%2Flearning-rust" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/motss/learning-rust on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/motss/learning-rust
[INFO] finished tweaking git repo https://github.com/motss/learning-rust
[INFO] tweaked toml for git repo https://github.com/motss/learning-rust written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/motss/learning-rust 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]      Locking 1 package
[INFO] [stderr]       Adding learning_rust v0.1.0 (/workspace/builds/worker-6-tc1/source)
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded matches v0.1.7
[INFO] [stderr]   Downloaded utf-8 v0.7.4
[INFO] [stderr]   Downloaded generic-array v0.9.0
[INFO] [stderr]   Downloaded sha-1 v0.7.0
[INFO] [stderr]   Downloaded digest v0.7.5
[INFO] [stderr]   Downloaded url v1.7.1
[INFO] [stderr]   Downloaded byte-tools v0.2.0
[INFO] [stderr]   Downloaded tungstenite v0.6.0
[INFO] [stderr]   Downloaded lazy_static v1.0.2
[INFO] [stderr]   Downloaded pretty_env_logger v0.2.4
[INFO] [stderr]   Downloaded string v0.1.1
[INFO] [stderr]   Downloaded quote v0.6.4
[INFO] [stderr]   Downloaded env_logger v0.5.12
[INFO] [stderr]   Downloaded proc-macro2 v0.4.9
[INFO] [stderr]   Downloaded syn v0.14.7
[INFO] [stderr]   Downloaded h2 v0.1.11
[INFO] [stderr]   Downloaded http v0.1.8
[INFO] [stderr]   Downloaded hyper v0.12.7
[INFO] [stderr]   Downloaded rand v0.5.4
[INFO] [stderr]   Downloaded serde_derive v1.0.70
[INFO] [stderr]   Downloaded indexmap v1.0.1
[INFO] [stderr]   Downloaded serde_json v1.0.24
[INFO] [stderr]   Downloaded serde v1.0.70
[INFO] [stderr]   Downloaded serde_urlencoded v0.5.2
[INFO] [stderr]   Downloaded base64 v0.9.2
[INFO] [stderr]   Downloaded httparse v1.3.2
[INFO] [stderr]   Downloaded block-buffer v0.3.3
[INFO] [stderr]   Downloaded arrayref v0.3.4
[INFO] [stderr]   Downloaded warp v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 655d87a55628edda00b7af1473b559e471f78ae3d5a2b76fa526e96d3a0f06bc
[INFO] running `Command { std: "docker" "start" "-a" "655d87a55628edda00b7af1473b559e471f78ae3d5a2b76fa526e96d3a0f06bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "655d87a55628edda00b7af1473b559e471f78ae3d5a2b76fa526e96d3a0f06bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "655d87a55628edda00b7af1473b559e471f78ae3d5a2b76fa526e96d3a0f06bc", kill_on_drop: false }`
[INFO] [stdout] 655d87a55628edda00b7af1473b559e471f78ae3d5a2b76fa526e96d3a0f06bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 356fd9e646a76cb5f0401da5b54870cb6656473ef356b38f6f0f8fddd2e85f17
[INFO] running `Command { std: "docker" "start" "-a" "356fd9e646a76cb5f0401da5b54870cb6656473ef356b38f6f0f8fddd2e85f17", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.42
[INFO] [stderr]     Checking cfg-if v0.1.4
[INFO] [stderr]     Checking futures v0.1.23
[INFO] [stderr]     Checking byteorder v1.2.4
[INFO] [stderr]     Checking lazy_static v1.0.2
[INFO] [stderr]     Checking slab v0.4.0
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking lazycell v0.6.0
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]     Checking itoa v0.4.2
[INFO] [stderr]     Checking matches v0.1.7
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling serde v1.0.70
[INFO] [stderr]    Compiling httparse v1.3.2
[INFO] [stderr]     Checking log v0.4.3
[INFO] [stderr]     Checking crossbeam-utils v0.3.2
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking unicode-normalization v0.1.7
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking ucd-util v0.1.1
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]     Checking arrayref v0.3.4
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]    Compiling regex v1.0.2
[INFO] [stderr]     Checking byte-tools v0.2.0
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]    Compiling proc-macro2 v0.4.9
[INFO] [stderr]     Checking regex-syntax v0.6.2
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking block-buffer v0.3.3
[INFO] [stderr]     Checking crossbeam-epoch v0.4.3
[INFO] [stderr]     Checking safemem v0.2.0
[INFO] [stderr]     Checking quick-error v1.2.2
[INFO] [stderr]     Checking dtoa v0.4.3
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking try-lock v0.2.2
[INFO] [stderr]     Checking string v0.1.1
[INFO] [stderr]     Checking indexmap v1.0.1
[INFO] [stderr]     Checking crossbeam-deque v0.3.1
[INFO] [stderr]     Checking humantime v1.1.1
[INFO] [stderr]     Checking base64 v0.9.2
[INFO] [stderr]     Checking termcolor v1.0.1
[INFO] [stderr]     Checking utf-8 v0.7.4
[INFO] [stderr]     Checking scoped-tls v0.1.2
[INFO] [stderr]     Checking bitflags v1.0.3
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]    Compiling quote v0.6.4
[INFO] [stderr]     Checking aho-corasick v0.6.6
[INFO] [stderr]     Checking bytes v0.4.9
[INFO] [stderr]     Checking rand v0.5.4
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]    Compiling syn v0.14.7
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking mio v0.6.15
[INFO] [stderr]     Checking generic-array v0.9.0
[INFO] [stderr]     Checking http v0.1.8
[INFO] [stderr]     Checking input_buffer v0.2.0
[INFO] [stderr]     Checking url v1.7.1
[INFO] [stderr]     Checking digest v0.7.5
[INFO] [stderr]     Checking sha-1 v0.7.0
[INFO] [stderr]     Checking tokio-io v0.1.7
[INFO] [stderr]     Checking tokio-executor v0.1.2
[INFO] [stderr]     Checking want v0.0.6
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking tokio-threadpool v0.1.5
[INFO] [stderr]     Checking tokio-timer v0.2.4
[INFO] [stderr]     Checking tungstenite v0.6.0
[INFO] [stderr]     Checking tokio-reactor v0.1.2
[INFO] [stderr]     Checking tokio-codec v0.1.0
[INFO] [stderr]     Checking h2 v0.1.11
[INFO] [stderr]     Checking tokio-fs v0.1.2
[INFO] [stderr]     Checking tokio-udp v0.1.1
[INFO] [stderr]     Checking tokio-tcp v0.1.0
[INFO] [stderr]     Checking env_logger v0.5.12
[INFO] [stderr]    Compiling serde_derive v1.0.70
[INFO] [stderr]     Checking tokio v0.1.7
[INFO] [stderr]     Checking pretty_env_logger v0.2.4
[INFO] [stderr]     Checking serde_urlencoded v0.5.2
[INFO] [stderr]     Checking serde_json v1.0.24
[INFO] [stderr]     Checking hyper v0.12.7
[INFO] [stderr]     Checking warp v0.1.0
[INFO] [stderr]     Checking learning_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.90s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.14.7
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "356fd9e646a76cb5f0401da5b54870cb6656473ef356b38f6f0f8fddd2e85f17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "356fd9e646a76cb5f0401da5b54870cb6656473ef356b38f6f0f8fddd2e85f17", kill_on_drop: false }`
[INFO] [stdout] 356fd9e646a76cb5f0401da5b54870cb6656473ef356b38f6f0f8fddd2e85f17
[INFO] checking motss/learning-rust against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmotss%2Flearning-rust" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/motss/learning-rust on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/motss/learning-rust
[INFO] finished tweaking git repo https://github.com/motss/learning-rust
[INFO] tweaked toml for git repo https://github.com/motss/learning-rust written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/motss/learning-rust 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3cd079abaf5348f52952cbab6eefe197c741e106128df0d3615c1e6dd7af808f
[INFO] running `Command { std: "docker" "start" "-a" "3cd079abaf5348f52952cbab6eefe197c741e106128df0d3615c1e6dd7af808f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3cd079abaf5348f52952cbab6eefe197c741e106128df0d3615c1e6dd7af808f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cd079abaf5348f52952cbab6eefe197c741e106128df0d3615c1e6dd7af808f", kill_on_drop: false }`
[INFO] [stdout] 3cd079abaf5348f52952cbab6eefe197c741e106128df0d3615c1e6dd7af808f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b3dd43d57e492911da93559904cb2a3b255e9ed1dbac929f1d5d090c44596618
[INFO] running `Command { std: "docker" "start" "-a" "b3dd43d57e492911da93559904cb2a3b255e9ed1dbac929f1d5d090c44596618", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.42
[INFO] [stderr]     Checking cfg-if v0.1.4
[INFO] [stderr]     Checking futures v0.1.23
[INFO] [stderr]     Checking byteorder v1.2.4
[INFO] [stderr]     Checking lazy_static v1.0.2
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]     Checking slab v0.4.0
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking lazycell v0.6.0
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]     Checking matches v0.1.7
[INFO] [stderr]     Checking itoa v0.4.2
[INFO] [stderr]     Checking unicode-normalization v0.1.7
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling serde v1.0.70
[INFO] [stderr]    Compiling httparse v1.3.2
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking ucd-util v0.1.1
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking log v0.4.3
[INFO] [stderr]     Checking crossbeam-utils v0.3.2
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking byte-tools v0.2.0
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]    Compiling regex v1.0.2
[INFO] [stderr]     Checking arrayref v0.3.4
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]     Checking block-buffer v0.3.3
[INFO] [stderr]     Checking regex-syntax v0.6.2
[INFO] [stderr]    Compiling proc-macro2 v0.4.9
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking quick-error v1.2.2
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking try-lock v0.2.2
[INFO] [stderr]     Checking dtoa v0.4.3
[INFO] [stderr]     Checking crossbeam-epoch v0.4.3
[INFO] [stderr]     Checking string v0.1.1
[INFO] [stderr]     Checking safemem v0.2.0
[INFO] [stderr]     Checking indexmap v1.0.1
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking bytes v0.4.9
[INFO] [stderr]     Checking base64 v0.9.2
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking aho-corasick v0.6.6
[INFO] [stderr]     Checking rand v0.5.4
[INFO] [stderr]     Checking crossbeam-deque v0.3.1
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking mio v0.6.15
[INFO] [stderr]     Checking humantime v1.1.1
[INFO] [stderr]     Checking utf-8 v0.7.4
[INFO] [stderr]     Checking http v0.1.8
[INFO] [stderr]     Checking input_buffer v0.2.0
[INFO] [stderr]    Compiling quote v0.6.4
[INFO] [stderr]     Checking termcolor v1.0.1
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking bitflags v1.0.3
[INFO] [stderr]     Checking scoped-tls v0.1.2
[INFO] [stderr]    Compiling syn v0.14.7
[INFO] [stderr]     Checking tokio-io v0.1.7
[INFO] [stderr]     Checking tokio-executor v0.1.2
[INFO] [stderr]     Checking want v0.0.6
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking generic-array v0.9.0
[INFO] [stderr]     Checking tokio-timer v0.2.4
[INFO] [stderr]     Checking tokio-threadpool v0.1.5
[INFO] [stderr]     Checking digest v0.7.5
[INFO] [stderr]     Checking sha-1 v0.7.0
[INFO] [stderr]     Checking tokio-reactor v0.1.2
[INFO] [stderr]     Checking tokio-codec v0.1.0
[INFO] [stderr]     Checking url v1.7.1
[INFO] [stderr]     Checking tokio-udp v0.1.1
[INFO] [stderr]     Checking tokio-tcp v0.1.0
[INFO] [stderr]     Checking tokio-fs v0.1.2
[INFO] [stderr]     Checking tokio v0.1.7
[INFO] [stderr]     Checking tungstenite v0.6.0
[INFO] [stderr]     Checking h2 v0.1.11
[INFO] [stderr]    Compiling serde_derive v1.0.70
[INFO] [stderr]     Checking env_logger v0.5.12
[INFO] [stderr]     Checking pretty_env_logger v0.2.4
[INFO] [stderr]     Checking hyper v0.12.7
[INFO] [stderr]     Checking serde_urlencoded v0.5.2
[INFO] [stderr]     Checking serde_json v1.0.24
[INFO] [stderr]     Checking warp v0.1.0
[INFO] [stderr]     Checking learning_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 15.04s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.14.7
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "b3dd43d57e492911da93559904cb2a3b255e9ed1dbac929f1d5d090c44596618", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3dd43d57e492911da93559904cb2a3b255e9ed1dbac929f1d5d090c44596618", kill_on_drop: false }`
[INFO] [stdout] b3dd43d57e492911da93559904cb2a3b255e9ed1dbac929f1d5d090c44596618