[INFO] fetching crate generic-cursors 0.0.3...
[INFO] testing generic-cursors-0.0.3 against 1.90.0 for beta-1.91-3
[INFO] extracting crate generic-cursors 0.0.3 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate generic-cursors 0.0.3
[INFO] finished tweaking crates.io crate generic-cursors 0.0.3
[INFO] tweaked toml for crates.io crate generic-cursors 0.0.3 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate generic-cursors 0.0.3 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate generic-cursors 0.0.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d2a810f2b52e24d632bcb8a65ece95eef1929d001ff9fbf2c860d0d2d5d8aca6
[INFO] running `Command { std: "docker" "start" "-a" "d2a810f2b52e24d632bcb8a65ece95eef1929d001ff9fbf2c860d0d2d5d8aca6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2a810f2b52e24d632bcb8a65ece95eef1929d001ff9fbf2c860d0d2d5d8aca6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2a810f2b52e24d632bcb8a65ece95eef1929d001ff9fbf2c860d0d2d5d8aca6", kill_on_drop: false }`
[INFO] [stdout] d2a810f2b52e24d632bcb8a65ece95eef1929d001ff9fbf2c860d0d2d5d8aca6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b8244135b0ba8f83783209db2af87a15285d6a54f8ea98a80047b33ef45f9f5
[INFO] running `Command { std: "docker" "start" "-a" "2b8244135b0ba8f83783209db2af87a15285d6a54f8ea98a80047b33ef45f9f5", kill_on_drop: false }`
[INFO] [stderr]    Compiling generic-cursors v0.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "2b8244135b0ba8f83783209db2af87a15285d6a54f8ea98a80047b33ef45f9f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b8244135b0ba8f83783209db2af87a15285d6a54f8ea98a80047b33ef45f9f5", kill_on_drop: false }`
[INFO] [stdout] 2b8244135b0ba8f83783209db2af87a15285d6a54f8ea98a80047b33ef45f9f5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 47ae896fa2ced694cf3f852e67eaaccf2877022d21ed8b12ae08f048f820011b
[INFO] running `Command { std: "docker" "start" "-a" "47ae896fa2ced694cf3f852e67eaaccf2877022d21ed8b12ae08f048f820011b", kill_on_drop: false }`
[INFO] [stderr]    Compiling generic-cursors v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `insert_next` is never used
[INFO] [stdout]   --> examples/cyclic_sync.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl<T> CyclicDataStructure<T> {
[INFO] [stdout]    | ------------------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 15 |     fn insert_next(&mut self, new_next: Arc<Mutex<Self>>) -> Option<Arc<Mutex<Self>>> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "47ae896fa2ced694cf3f852e67eaaccf2877022d21ed8b12ae08f048f820011b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47ae896fa2ced694cf3f852e67eaaccf2877022d21ed8b12ae08f048f820011b", kill_on_drop: false }`
[INFO] [stdout] 47ae896fa2ced694cf3f852e67eaaccf2877022d21ed8b12ae08f048f820011b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 40ea55d41c9b5c0cdbd5fa8316fac723f6f2685c3375add30fa5c69749c0b9bb
[INFO] running `Command { std: "docker" "start" "-a" "40ea55d41c9b5c0cdbd5fa8316fac723f6f2685c3375add30fa5c69749c0b9bb", kill_on_drop: false }`
[INFO] [stderr] warning: method `insert_next` is never used
[INFO] [stderr]   --> examples/cyclic_sync.rs:15:8
[INFO] [stderr]    |
[INFO] [stderr] 11 | impl<T> CyclicDataStructure<T> {
[INFO] [stderr]    | ------------------------------ method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 15 |     fn insert_next(&mut self, new_next: Arc<Mutex<Self>>) -> Option<Arc<Mutex<Self>>> {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `generic-cursors` (example "cyclic_sync") generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/generic_cursors-6ea7a25e27c071ae)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests generic_cursors
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "40ea55d41c9b5c0cdbd5fa8316fac723f6f2685c3375add30fa5c69749c0b9bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40ea55d41c9b5c0cdbd5fa8316fac723f6f2685c3375add30fa5c69749c0b9bb", kill_on_drop: false }`
[INFO] [stdout] 40ea55d41c9b5c0cdbd5fa8316fac723f6f2685c3375add30fa5c69749c0b9bb