[INFO] cloning repository https://github.com/tarkah/alexa-skill-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tarkah/alexa-skill-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftarkah%2Falexa-skill-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftarkah%2Falexa-skill-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4806970afab731f1c29cb185fcc7be2170b67c9f
[INFO] checking tarkah/alexa-skill-rust against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftarkah%2Falexa-skill-rust" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tarkah/alexa-skill-rust on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tarkah/alexa-skill-rust
[INFO] finished tweaking git repo https://github.com/tarkah/alexa-skill-rust
[INFO] tweaked toml for git repo https://github.com/tarkah/alexa-skill-rust written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/tarkah/alexa-skill-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/tarkah/alexa_rust`
[INFO] [stderr]     Blocking waiting for file lock on package cache
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9abd978f3cdd420fa9f590b1e288a707eb34d8aacba74af8bc8cd5acc333f947
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9abd978f3cdd420fa9f590b1e288a707eb34d8aacba74af8bc8cd5acc333f947", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9abd978f3cdd420fa9f590b1e288a707eb34d8aacba74af8bc8cd5acc333f947", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9abd978f3cdd420fa9f590b1e288a707eb34d8aacba74af8bc8cd5acc333f947", kill_on_drop: false }`
[INFO] [stdout] 9abd978f3cdd420fa9f590b1e288a707eb34d8aacba74af8bc8cd5acc333f947
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4e3cc52c7e8475764337edf66f2910a9c011b6cd0836cd093ef44ef3b4b7d3e5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4e3cc52c7e8475764337edf66f2910a9c011b6cd0836cd093ef44ef3b4b7d3e5", kill_on_drop: false }`
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[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/main.rs:34:64
[INFO] [stdout]    |
[INFO] [stdout] 34 |     static ref CHANNEL_A: (Sender<String>, Receiver<String>) = { bounded(1) };
[INFO] [stdout]    |                                                                ^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/main.rs:37:64
[INFO] [stdout]    |
[INFO] [stdout] 37 |     static ref CHANNEL_B: (Sender<String>, Receiver<String>) = { bounded(1) };
[INFO] [stdout]    |                                                                ^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/main.rs:34:64
[INFO] [stdout]    |
[INFO] [stdout] 34 |     static ref CHANNEL_A: (Sender<String>, Receiver<String>) = { bounded(1) };
[INFO] [stdout]    |                                                                ^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/main.rs:37:64
[INFO] [stdout]    |
[INFO] [stdout] 37 |     static ref CHANNEL_B: (Sender<String>, Receiver<String>) = { bounded(1) };
[INFO] [stdout]    |                                                                ^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 44s
[INFO] running `Command { std: "docker" "inspect" "4e3cc52c7e8475764337edf66f2910a9c011b6cd0836cd093ef44ef3b4b7d3e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e3cc52c7e8475764337edf66f2910a9c011b6cd0836cd093ef44ef3b4b7d3e5", kill_on_drop: false }`
[INFO] [stdout] 4e3cc52c7e8475764337edf66f2910a9c011b6cd0836cd093ef44ef3b4b7d3e5