[INFO] crate etcd-rs 0.2.0-alpha.4 is already in cache
[INFO] checking etcd-rs-0.2.0-alpha.4 against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] extracting crate etcd-rs 0.2.0-alpha.4 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate etcd-rs 0.2.0-alpha.4 on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate etcd-rs 0.2.0-alpha.4
[INFO] finished tweaking crates.io crate etcd-rs 0.2.0-alpha.4
[INFO] tweaked toml for crates.io crate etcd-rs 0.2.0-alpha.4 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate etcd-rs 0.2.0-alpha.4 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "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-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" "/opt/rustwide/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "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] 555f8ce5a659eb48db1e9d2dae722f404c1d93e17b06a2dcad34776ba2caa3d5
[INFO] running `"docker" "start" "-a" "555f8ce5a659eb48db1e9d2dae722f404c1d93e17b06a2dcad34776ba2caa3d5"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]     Checking tower-layer v0.3.0-alpha.2
[INFO] [stderr]    Compiling multimap v0.4.0
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling petgraph v0.4.13
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]    Compiling getrandom v0.1.13
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[INFO] [stderr]    Compiling failure v0.1.6
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[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling which v2.0.1
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[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling prost-build v0.5.0
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[INFO] [stderr]    Compiling prost-derive v0.5.0
[INFO] [stderr]    Compiling tempfile v3.1.0
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[INFO] [stderr]    Compiling prost v0.5.0
[INFO] [stderr]    Compiling prost-types v0.5.0
[INFO] [stderr]    Compiling tonic-build v0.1.0-alpha.6
[INFO] [stderr]    Compiling pin-project-internal v0.4.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.5
[INFO] [stderr]    Compiling tokio-macros v0.2.0-alpha.6
[INFO] [stderr]    Compiling async-stream-impl v0.1.1
[INFO] [stderr]    Compiling async-trait v0.1.16
[INFO] [stderr]    Compiling etcd-rs v0.2.0-alpha.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking async-stream v0.1.2
[INFO] [stderr]     Checking tracing v0.1.10
[INFO] [stderr]     Checking tokio-executor v0.2.0-alpha.6
[INFO] [stderr]     Checking pin-project v0.4.5
[INFO] [stderr]     Checking tokio-io v0.2.0-alpha.6
[INFO] [stderr]     Checking tower-discover v0.3.0-alpha.2
[INFO] [stderr]     Checking tower-load-shed v0.3.0-alpha.2
[INFO] [stderr]     Checking tower-util v0.3.0-alpha.2
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[INFO] [stderr]     Checking tower-make v0.3.0-alpha.2a
[INFO] [stderr]     Checking h2 v0.2.0-alpha.3
[INFO] [stderr]     Checking tokio-timer v0.3.0-alpha.6
[INFO] [stderr]     Checking tokio-net v0.2.0-alpha.6
[INFO] [stderr]     Checking tokio-fs v0.2.0-alpha.6
[INFO] [stderr]     Checking tower-buffer v0.3.0-alpha.2
[INFO] [stderr]     Checking tower-retry v0.3.0-alpha.2
[INFO] [stderr]     Checking tower-limit v0.3.0-alpha.2
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[INFO] [stderr]     Checking tower v0.3.0-alpha.2
[INFO] [stderr]     Checking tower-balance v0.3.0-alpha.2
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[INFO] [stderr]     Checking tonic v0.1.0-alpha.6
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> examples/lease.rs:114:5
[INFO] [stderr]     |
[INFO] [stderr] 105 | /         loop {
[INFO] [stderr] 106 | |             interval.next().await;
[INFO] [stderr] 107 | |             client
[INFO] [stderr] 108 | |                 .lease()
[INFO] [stderr] 109 | |                 .keep_alive(LeaseKeepAliveRequest::new(lease_id))
[INFO] [stderr] 110 | |                 .await;
[INFO] [stderr] 111 | |         }
[INFO] [stderr]     | |_________- any code following this expression is unreachable
[INFO] [stderr] ...
[INFO] [stderr] 114 |       Ok(())
[INFO] [stderr]     |       ^^^^^^ unreachable expression
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `grant_lease`
[INFO] [stderr]  --> examples/lease.rs:7:10
[INFO] [stderr]   |
[INFO] [stderr] 7 | async fn grant_lease(client: &Client) -> Result<()> {
[INFO] [stderr]   |          ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 29s
[INFO] running `"docker" "inspect" "555f8ce5a659eb48db1e9d2dae722f404c1d93e17b06a2dcad34776ba2caa3d5"`
[INFO] running `"docker" "rm" "-f" "555f8ce5a659eb48db1e9d2dae722f404c1d93e17b06a2dcad34776ba2caa3d5"`
[INFO] [stdout] 555f8ce5a659eb48db1e9d2dae722f404c1d93e17b06a2dcad34776ba2caa3d5