[INFO] crate rxrust 0.8.1 is already in cache
[INFO] checking rxrust-0.8.1 against try#f88e9a4452e792c29632101b348a1df9876d45cd for pr-70087
[INFO] extracting crate rxrust 0.8.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate rxrust 0.8.1 on toolchain f88e9a4452e792c29632101b348a1df9876d45cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f88e9a4452e792c29632101b348a1df9876d45cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate rxrust 0.8.1
[INFO] finished tweaking crates.io crate rxrust 0.8.1
[INFO] tweaked toml for crates.io crate rxrust 0.8.1 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f88e9a4452e792c29632101b348a1df9876d45cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f88e9a4452e792c29632101b348a1df9876d45cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+f88e9a4452e792c29632101b348a1df9876d45cd" "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] dbd943d41ed66db2d1db40a09ee26d37cbecbe831aa6d27cb8bbb0bb907d1551
[INFO] running `"docker" "start" "-a" "dbd943d41ed66db2d1db40a09ee26d37cbecbe831aa6d27cb8bbb0bb907d1551"`
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking float-cmp v0.5.3
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking futures-timer v0.3.0
[INFO] [stderr]     Checking rxrust v0.8.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `subscriber`
[INFO] [stderr]    --> src/observable/trivial.rs:95:20
[INFO] [stderr]     |
[INFO] [stderr] 95  |   fn emit<O>(self, subscriber: Subscriber<O, $subscription>)
[INFO] [stderr]     |                    ^^^^^^^^^^ help: consider prefixing with an underscore: `_subscriber`
[INFO] [stderr] ...
[INFO] [stderr] 109 |   never_emitter!(LocalSubscription, 'a);
[INFO] [stderr]     |   -------------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `subscriber`
[INFO] [stderr]    --> src/observable/trivial.rs:95:20
[INFO] [stderr]     |
[INFO] [stderr] 95  |   fn emit<O>(self, subscriber: Subscriber<O, $subscription>)
[INFO] [stderr]     |                    ^^^^^^^^^^ help: consider prefixing with an underscore: `_subscriber`
[INFO] [stderr] ...
[INFO] [stderr] 114 |   never_emitter!(SharedSubscription, Send + Sync + 'static);
[INFO] [stderr]     |   ---------------------------------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `subscriber`
[INFO] [stderr]    --> src/observable/trivial.rs:95:20
[INFO] [stderr]     |
[INFO] [stderr] 95  |   fn emit<O>(self, subscriber: Subscriber<O, $subscription>)
[INFO] [stderr]     |                    ^^^^^^^^^^ help: consider prefixing with an underscore: `_subscriber`
[INFO] [stderr] ...
[INFO] [stderr] 109 |   never_emitter!(LocalSubscription, 'a);
[INFO] [stderr]     |   -------------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `subscriber`
[INFO] [stderr]    --> src/observable/trivial.rs:95:20
[INFO] [stderr]     |
[INFO] [stderr] 95  |   fn emit<O>(self, subscriber: Subscriber<O, $subscription>)
[INFO] [stderr]     |                    ^^^^^^^^^^ help: consider prefixing with an underscore: `_subscriber`
[INFO] [stderr] ...
[INFO] [stderr] 114 |   never_emitter!(SharedSubscription, Send + Sync + 'static);
[INFO] [stderr]     |   ---------------------------------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.47s
[INFO] running `"docker" "inspect" "dbd943d41ed66db2d1db40a09ee26d37cbecbe831aa6d27cb8bbb0bb907d1551"`
[INFO] running `"docker" "rm" "-f" "dbd943d41ed66db2d1db40a09ee26d37cbecbe831aa6d27cb8bbb0bb907d1551"`
[INFO] [stdout] dbd943d41ed66db2d1db40a09ee26d37cbecbe831aa6d27cb8bbb0bb907d1551