[INFO] fetching crate rust-rocket 0.3.5...
[INFO] checking rust-rocket-0.3.5 against try#6024cfef3a82f9a7688f07054f1650081bad3af5 for pr-74130
[INFO] extracting crate rust-rocket 0.3.5 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate rust-rocket 0.3.5 on toolchain 6024cfef3a82f9a7688f07054f1650081bad3af5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rust-rocket 0.3.5
[INFO] finished tweaking crates.io crate rust-rocket 0.3.5
[INFO] tweaked toml for crates.io crate rust-rocket 0.3.5 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2c4b054af8cbb2d6f4fd8d8940df98f8328e7386d127b22c1726913f8f4a0982
[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" "2c4b054af8cbb2d6f4fd8d8940df98f8328e7386d127b22c1726913f8f4a0982", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2c4b054af8cbb2d6f4fd8d8940df98f8328e7386d127b22c1726913f8f4a0982", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c4b054af8cbb2d6f4fd8d8940df98f8328e7386d127b22c1726913f8f4a0982", kill_on_drop: false }`
[INFO] [stdout] 2c4b054af8cbb2d6f4fd8d8940df98f8328e7386d127b22c1726913f8f4a0982
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 838da7ddc1b25f1adf30dd028ae7d72fc3f59161b11ab6158ce9766b3f43de17
[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" "838da7ddc1b25f1adf30dd028ae7d72fc3f59161b11ab6158ce9766b3f43de17", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-rocket v0.3.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/client.rs:232:33
[INFO] [stdout]     |
[INFO] [stdout] 232 | ...                   let mut track =
[INFO] [stdout]     |                           ----^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/client.rs:242:33
[INFO] [stdout]     |
[INFO] [stdout] 242 | ...                   let mut track =
[INFO] [stdout]     |                           ----^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/client.rs:232:33
[INFO] [stdout]     |
[INFO] [stdout] 232 | ...                   let mut track =
[INFO] [stdout]     |                           ----^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/client.rs:242:33
[INFO] [stdout]     |
[INFO] [stdout] 242 | ...                   let mut track =
[INFO] [stdout]     |                           ----^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `Command { std: "docker" "inspect" "838da7ddc1b25f1adf30dd028ae7d72fc3f59161b11ab6158ce9766b3f43de17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "838da7ddc1b25f1adf30dd028ae7d72fc3f59161b11ab6158ce9766b3f43de17", kill_on_drop: false }`
[INFO] [stdout] 838da7ddc1b25f1adf30dd028ae7d72fc3f59161b11ab6158ce9766b3f43de17