[INFO] cloning repository https://github.com/cdouglass/morse-practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cdouglass/morse-practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcdouglass%2Fmorse-practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcdouglass%2Fmorse-practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1d9c32e9f1391fc62e7e773bde29064435efa732
[INFO] checking cdouglass/morse-practice against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcdouglass%2Fmorse-practice" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cdouglass/morse-practice on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cdouglass/morse-practice
[INFO] finished tweaking git repo https://github.com/cdouglass/morse-practice
[INFO] tweaked toml for git repo https://github.com/cdouglass/morse-practice written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/cdouglass/morse-practice already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libc v0.2.35
[INFO] [stderr]   Downloaded winapi v0.3.3
[INFO] [stderr]   Downloaded winapi-i686-pc-windows-gnu v0.3.2
[INFO] [stderr]   Downloaded winapi-x86_64-pc-windows-gnu v0.3.2
[INFO] [stderr]   Downloaded serde v1.0.29
[INFO] [stderr]   Downloaded serde_derive_internals v0.20.0
[INFO] [stderr]   Downloaded serde_derive v1.0.29
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4c6c3d4a2513fed08f911b0203e93cc72043541c63e2530578d73b0bf66bb5b3
[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" "4c6c3d4a2513fed08f911b0203e93cc72043541c63e2530578d73b0bf66bb5b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c6c3d4a2513fed08f911b0203e93cc72043541c63e2530578d73b0bf66bb5b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c6c3d4a2513fed08f911b0203e93cc72043541c63e2530578d73b0bf66bb5b3", kill_on_drop: false }`
[INFO] [stdout] 4c6c3d4a2513fed08f911b0203e93cc72043541c63e2530578d73b0bf66bb5b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d77f20cdb81250584a4de5f23b39bb789c23fd145de0ecf45e71a4d90d0fc3d2
[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" "d77f20cdb81250584a4de5f23b39bb789c23fd145de0ecf45e71a4d90d0fc3d2", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking serde v1.0.29
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]    Compiling proc-macro2 v0.2.3
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]     Checking regex v0.2.5
[INFO] [stderr]    Compiling quote v0.4.2
[INFO] [stderr]    Compiling syn v0.12.14
[INFO] [stderr]    Compiling serde_derive_internals v0.20.0
[INFO] [stderr]    Compiling serde_derive v1.0.29
[INFO] [stderr]     Checking docopt v0.8.3
[INFO] [stderr]     Checking morse v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/words.rs:23:20
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub words: Box<Iterator<Item=String>>
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=String>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/words.rs:23:20
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub words: Box<Iterator<Item=String>>
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=String>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.34s
[INFO] running `Command { std: "docker" "inspect" "d77f20cdb81250584a4de5f23b39bb789c23fd145de0ecf45e71a4d90d0fc3d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d77f20cdb81250584a4de5f23b39bb789c23fd145de0ecf45e71a4d90d0fc3d2", kill_on_drop: false }`
[INFO] [stdout] d77f20cdb81250584a4de5f23b39bb789c23fd145de0ecf45e71a4d90d0fc3d2