[INFO] crate firebase-rs 1.0.3 is already in cache
[INFO] checking firebase-rs-1.0.3 against try#b2a885c600d942fb829a214e798f7ae205a0594e for pr-71796
[INFO] extracting crate firebase-rs 1.0.3 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate firebase-rs 1.0.3 on toolchain b2a885c600d942fb829a214e798f7ae205a0594e
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b2a885c600d942fb829a214e798f7ae205a0594e" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b2a885c600d942fb829a214e798f7ae205a0594e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b2a885c600d942fb829a214e798f7ae205a0594e" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "/opt/rustwide/cargo-home/bin/cargo" "+b2a885c600d942fb829a214e798f7ae205a0594e" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] bd758c3ca71062ea8f40f700283e12136c906ae2877ec4ba8a95fc43a1d58bb2
[INFO] running `"docker" "start" "-a" "bd758c3ca71062ea8f40f700283e12136c906ae2877ec4ba8a95fc43a1d58bb2"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]    Compiling openssl-sys v0.9.56
[INFO] [stderr]    Compiling curl-sys v0.4.31+curl-7.70.0
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]     Checking libz-sys v1.0.25
[INFO] [stderr]     Checking serde v1.0.110
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking serde_json v1.0.53
[INFO] [stderr]    Compiling curl v0.4.29
[INFO] [stderr]     Checking firebase-rs v1.0.3 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]    --> src/lib.rs:284:16
[INFO] [stderr]     |
[INFO] [stderr] 284 |             Ok(res) => {
[INFO] [stderr]     |                ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
[INFO] [stderr]    --> src/lib.rs:487:9
[INFO] [stderr]     |
[INFO] [stderr] 487 | /         self.params
[INFO] [stderr] 488 | |             .iter()
[INFO] [stderr] 489 | |             .map(|(k, v)| url.set_query(Some(format!("{}={}", k, v).as_str())))
[INFO] [stderr] 490 | |             .collect::<()>();
[INFO] [stderr]     | |_____________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]    --> src/lib.rs:284:16
[INFO] [stderr]     |
[INFO] [stderr] 284 |             Ok(res) => {
[INFO] [stderr]     |                ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
[INFO] [stderr]    --> src/lib.rs:487:9
[INFO] [stderr]     |
[INFO] [stderr] 487 | /         self.params
[INFO] [stderr] 488 | |             .iter()
[INFO] [stderr] 489 | |             .map(|(k, v)| url.set_query(Some(format!("{}={}", k, v).as_str())))
[INFO] [stderr] 490 | |             .collect::<()>();
[INFO] [stderr]     | |_____________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.89s
[INFO] running `"docker" "inspect" "bd758c3ca71062ea8f40f700283e12136c906ae2877ec4ba8a95fc43a1d58bb2"`
[INFO] running `"docker" "rm" "-f" "bd758c3ca71062ea8f40f700283e12136c906ae2877ec4ba8a95fc43a1d58bb2"`
[INFO] [stdout] bd758c3ca71062ea8f40f700283e12136c906ae2877ec4ba8a95fc43a1d58bb2