[INFO] fetching crate firebase-rs 1.0.3...
[INFO] checking firebase-rs-1.0.3 against beta for pr-78714
[INFO] extracting crate firebase-rs 1.0.3 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate firebase-rs 1.0.3 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate firebase-rs 1.0.3
[INFO] finished tweaking crates.io crate firebase-rs 1.0.3
[INFO] tweaked toml for crates.io crate firebase-rs 1.0.3 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 24804cdc91374533c9c79768587473890d05fdfba217da26d318ecc7485d918a
[INFO] running `Command { std: "docker" "start" "-a" "24804cdc91374533c9c79768587473890d05fdfba217da26d318ecc7485d918a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "24804cdc91374533c9c79768587473890d05fdfba217da26d318ecc7485d918a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24804cdc91374533c9c79768587473890d05fdfba217da26d318ecc7485d918a", kill_on_drop: false }`
[INFO] [stdout] 24804cdc91374533c9c79768587473890d05fdfba217da26d318ecc7485d918a
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2a3eeaafe0d9fce4b3dec15f4c4b5e1da0eb5b57d509d7e8a903660a8dd68195
[INFO] running `Command { std: "docker" "start" "-a" "2a3eeaafe0d9fce4b3dec15f4c4b5e1da0eb5b57d509d7e8a903660a8dd68195", kill_on_drop: false }`
[INFO] [stderr]    Compiling curl v0.4.34
[INFO] [stderr]    Compiling libz-sys v1.1.2
[INFO] [stderr]    Compiling curl-sys v0.4.38+curl-7.73.0
[INFO] [stderr]     Checking firebase-rs v1.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]    --> src/lib.rs:284:16
[INFO] [stdout]     |
[INFO] [stdout] 284 |             Ok(res) => {
[INFO] [stdout]     |                ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]    --> src/lib.rs:284:16
[INFO] [stdout]     |
[INFO] [stdout] 284 |             Ok(res) => {
[INFO] [stdout]     |                ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `collect` that must be used
[INFO] [stdout]    --> src/lib.rs:487:9
[INFO] [stdout]     |
[INFO] [stdout] 487 | /         self.params
[INFO] [stdout] 488 | |             .iter()
[INFO] [stdout] 489 | |             .map(|(k, v)| url.set_query(Some(format!("{}={}", k, v).as_str())))
[INFO] [stdout] 490 | |             .collect::<()>();
[INFO] [stdout]     | |_____________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `collect` that must be used
[INFO] [stdout]    --> src/lib.rs:487:9
[INFO] [stdout]     |
[INFO] [stdout] 487 | /         self.params
[INFO] [stdout] 488 | |             .iter()
[INFO] [stdout] 489 | |             .map(|(k, v)| url.set_query(Some(format!("{}={}", k, v).as_str())))
[INFO] [stdout] 490 | |             .collect::<()>();
[INFO] [stdout]     | |_____________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[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 11.88s
[INFO] running `Command { std: "docker" "inspect" "2a3eeaafe0d9fce4b3dec15f4c4b5e1da0eb5b57d509d7e8a903660a8dd68195", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a3eeaafe0d9fce4b3dec15f4c4b5e1da0eb5b57d509d7e8a903660a8dd68195", kill_on_drop: false }`
[INFO] [stdout] 2a3eeaafe0d9fce4b3dec15f4c4b5e1da0eb5b57d509d7e8a903660a8dd68195