[INFO] cloning repository https://github.com/jalalazimi/rust-zoo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jalalazimi/rust-zoo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjalalazimi%2Frust-zoo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjalalazimi%2Frust-zoo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7682244343669eb0ff806f87d0294de8ad89270b
[INFO] checking jalalazimi/rust-zoo against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjalalazimi%2Frust-zoo" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jalalazimi/rust-zoo on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jalalazimi/rust-zoo
[INFO] finished tweaking git repo https://github.com/jalalazimi/rust-zoo
[INFO] tweaked toml for git repo https://github.com/jalalazimi/rust-zoo written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/jalalazimi/rust-zoo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eec5d112ec140732d1ff81ca4b25cdfddd3d6b7e17d057871710c2f3c8c5397c
[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" "eec5d112ec140732d1ff81ca4b25cdfddd3d6b7e17d057871710c2f3c8c5397c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eec5d112ec140732d1ff81ca4b25cdfddd3d6b7e17d057871710c2f3c8c5397c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eec5d112ec140732d1ff81ca4b25cdfddd3d6b7e17d057871710c2f3c8c5397c", kill_on_drop: false }`
[INFO] [stdout] eec5d112ec140732d1ff81ca4b25cdfddd3d6b7e17d057871710c2f3c8c5397c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 68f83de88aa8e76b7ef8bf7431a884b3e6e9e47a334d9d404e95b12dff05b25b
[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" "68f83de88aa8e76b7ef8bf7431a884b3e6e9e47a334d9d404e95b12dff05b25b", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-zoo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `is_prime` is never read
[INFO] [stdout]  --> src/primes.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |         let mut is_prime: bool = true;
[INFO] [stdout]   |             ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `is_prime` is never read
[INFO] [stdout]  --> src/primes.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |         let mut is_prime: bool = true;
[INFO] [stdout]   |             ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `Command { std: "docker" "inspect" "68f83de88aa8e76b7ef8bf7431a884b3e6e9e47a334d9d404e95b12dff05b25b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68f83de88aa8e76b7ef8bf7431a884b3e6e9e47a334d9d404e95b12dff05b25b", kill_on_drop: false }`
[INFO] [stdout] 68f83de88aa8e76b7ef8bf7431a884b3e6e9e47a334d9d404e95b12dff05b25b