[INFO] cloning repository https://github.com/mickjohn/red_or_black
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mickjohn/red_or_black" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmickjohn%2Fred_or_black", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmickjohn%2Fred_or_black'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] faef532853b7e969b3848e32baa09297393749d9
[INFO] checking mickjohn/red_or_black against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmickjohn%2Fred_or_black" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mickjohn/red_or_black 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/mickjohn/red_or_black
[INFO] finished tweaking git repo https://github.com/mickjohn/red_or_black
[INFO] tweaked toml for git repo https://github.com/mickjohn/red_or_black written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mickjohn/red_or_black 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]  Downloading crates ...
[INFO] [stderr]   Downloaded url v1.7.1
[INFO] [stderr]   Downloaded bytes v0.4.10
[INFO] [stderr]   Downloaded log v0.4.5
[INFO] [stderr]   Downloaded cfg-if v0.1.5
[INFO] [stderr]   Downloaded aho-corasick v0.6.8
[INFO] [stderr]   Downloaded utf8-ranges v1.0.1
[INFO] [stderr]   Downloaded memchr v2.1.0
[INFO] [stderr]   Downloaded serde_derive v1.0.78
[INFO] [stderr]   Downloaded ryu v0.2.6
[INFO] [stderr]   Downloaded regex-syntax v0.6.2
[INFO] [stderr]   Downloaded regex v1.0.5
[INFO] [stderr]   Downloaded unicode-normalization v0.1.7
[INFO] [stderr]   Downloaded serde v1.0.78
[INFO] [stderr]   Downloaded serde_json v1.0.27
[INFO] [stderr]   Downloaded ws v0.7.8
[INFO] [stderr]   Downloaded lazy_static v1.1.0
[INFO] [stderr]   Downloaded termcolor v1.0.4
[INFO] [stderr]   Downloaded proc-macro2 v0.4.19
[INFO] [stderr]   Downloaded quote v0.6.8
[INFO] [stderr]   Downloaded byteorder v1.2.6
[INFO] [stderr]   Downloaded rand_core v0.2.1
[INFO] [stderr]   Downloaded httparse v1.3.2
[INFO] [stderr]   Downloaded version_check v0.1.4
[INFO] [stderr]   Downloaded wincolor v1.0.1
[INFO] [stderr]   Downloaded lazycell v1.1.0
[INFO] [stderr]   Downloaded syn v0.15.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 69afaf6d6288f5a9b8c7d30d077814c528fcd68cee48758b850b29662a66783e
[INFO] running `Command { std: "docker" "start" "-a" "69afaf6d6288f5a9b8c7d30d077814c528fcd68cee48758b850b29662a66783e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "69afaf6d6288f5a9b8c7d30d077814c528fcd68cee48758b850b29662a66783e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69afaf6d6288f5a9b8c7d30d077814c528fcd68cee48758b850b29662a66783e", kill_on_drop: false }`
[INFO] [stdout] 69afaf6d6288f5a9b8c7d30d077814c528fcd68cee48758b850b29662a66783e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 0e8d38dc7c3892a4070deda1cef8b4bc3f46a2f3fd44137af8c0a00d0df8d3c9
[INFO] running `Command { std: "docker" "start" "-a" "0e8d38dc7c3892a4070deda1cef8b4bc3f46a2f3fd44137af8c0a00d0df8d3c9", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]    Compiling version_check v0.1.4
[INFO] [stderr]     Checking cfg-if v0.1.5
[INFO] [stderr]    Compiling proc-macro2 v0.4.19
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking unicode-normalization v0.1.7
[INFO] [stderr]    Compiling ryu v0.2.6
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking log v0.4.5
[INFO] [stderr]     Checking slab v0.4.1
[INFO] [stderr]     Checking ucd-util v0.1.1
[INFO] [stderr]    Compiling serde v1.0.78
[INFO] [stderr]     Checking lazycell v1.1.0
[INFO] [stderr]    Compiling memchr v2.1.0
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]    Compiling regex v1.0.5
[INFO] [stderr]    Compiling httparse v1.3.2
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking regex-syntax v0.6.2
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking mio v0.6.16
[INFO] [stderr]     Checking quick-error v1.2.2
[INFO] [stderr]     Checking byteorder v1.2.6
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.6.8
[INFO] [stderr]     Checking utf8-ranges v1.0.1
[INFO] [stderr]     Checking humantime v1.1.1
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]     Checking bytes v0.4.10
[INFO] [stderr]    Compiling syn v0.15.4
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking rand v0.4.3
[INFO] [stderr]     Checking itoa v0.4.3
[INFO] [stderr]     Checking url v1.7.1
[INFO] [stderr]     Checking sha1 v0.6.0
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]     Checking termcolor v1.0.4
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]     Checking ws v0.7.8
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]    Compiling serde_derive v1.0.78
[INFO] [stderr]     Checking serde_json v1.0.27
[INFO] [stderr]     Checking websocket_red_or_black v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]  --> src/red_or_black/game.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use serde_json;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | extern crate serde_json;
[INFO] [stdout]   | ------------------------ the item `serde_json` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]  --> src/red_or_black/messages.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use serde_json;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | extern crate serde_json;
[INFO] [stdout]   | ------------------------ the item `serde_json` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CardColour` is imported redundantly
[INFO] [stdout]    --> src/red_or_black/rules.rs:172:13
[INFO] [stdout]     |
[INFO] [stdout] 171 |         use super::*;
[INFO] [stdout]     |             -------- the item `CardColour` is already imported here
[INFO] [stdout] 172 |         use red_or_black::messages::CardColour;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CardColour` is imported redundantly
[INFO] [stdout]    --> src/red_or_black/rules.rs:207:13
[INFO] [stdout]     |
[INFO] [stdout] 206 |         use super::*;
[INFO] [stdout]     |             -------- the item `CardColour` is already imported here
[INFO] [stdout] 207 |         use red_or_black::messages::CardColour;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]  --> src/red_or_black/game.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use serde_json;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | extern crate serde_json;
[INFO] [stdout]   | ------------------------ the item `serde_json` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]  --> src/red_or_black/messages.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use serde_json;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | extern crate serde_json;
[INFO] [stdout]   | ------------------------ the item `serde_json` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 19.87s
[INFO] running `Command { std: "docker" "inspect" "0e8d38dc7c3892a4070deda1cef8b4bc3f46a2f3fd44137af8c0a00d0df8d3c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e8d38dc7c3892a4070deda1cef8b4bc3f46a2f3fd44137af8c0a00d0df8d3c9", kill_on_drop: false }`
[INFO] [stdout] 0e8d38dc7c3892a4070deda1cef8b4bc3f46a2f3fd44137af8c0a00d0df8d3c9