[INFO] fetching crate acestream_client 0.1.1...
[INFO] testing acestream_client-0.1.1 against 1.49.0 for beta-1.50-1
[INFO] extracting crate acestream_client 0.1.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate acestream_client 0.1.1 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate acestream_client 0.1.1
[INFO] finished tweaking crates.io crate acestream_client 0.1.1
[INFO] tweaked toml for crates.io crate acestream_client 0.1.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 26c0c6a54e8801ad73456b90bac7231bad4df2731be101e939125653c5619926
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "26c0c6a54e8801ad73456b90bac7231bad4df2731be101e939125653c5619926", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "26c0c6a54e8801ad73456b90bac7231bad4df2731be101e939125653c5619926", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26c0c6a54e8801ad73456b90bac7231bad4df2731be101e939125653c5619926", kill_on_drop: false }`
[INFO] [stdout] 26c0c6a54e8801ad73456b90bac7231bad4df2731be101e939125653c5619926
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0b3803d5a99fe9d85a54b8747b9e4317a427890fccb2735224e1920c2e5780cb
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0b3803d5a99fe9d85a54b8747b9e4317a427890fccb2735224e1920c2e5780cb", kill_on_drop: false }`
[INFO] [stderr]    Compiling openssl v0.10.32
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling crossbeam v0.7.3
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling native-tls v0.2.7
[INFO] [stderr]    Compiling hyper-tls v0.3.2
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]    Compiling serde_urlencoded v0.5.5
[INFO] [stderr]    Compiling cookie_store v0.7.0
[INFO] [stderr]    Compiling reqwest v0.9.24
[INFO] [stderr]    Compiling acestream_client v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.39s
[INFO] running `Command { std: "docker" "inspect" "0b3803d5a99fe9d85a54b8747b9e4317a427890fccb2735224e1920c2e5780cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b3803d5a99fe9d85a54b8747b9e4317a427890fccb2735224e1920c2e5780cb", kill_on_drop: false }`
[INFO] [stdout] 0b3803d5a99fe9d85a54b8747b9e4317a427890fccb2735224e1920c2e5780cb
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 980bf2514ddacbd844cde774b537ff3aae69c7599e3e49bb5628e24de59b714f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "980bf2514ddacbd844cde774b537ff3aae69c7599e3e49bb5628e24de59b714f", kill_on_drop: false }`
[INFO] [stderr]    Compiling acestream_client v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `acestream`
[INFO] [stdout]  --> tests/engine_url.rs:5:29
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let engine = acestream::Engine::new();
[INFO] [stdout]   |                             ^^^^^^ not found in `acestream`
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 4 | use acestream_client::Engine;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `acestream_client`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> examples/aceplay.rs:53:5
[INFO] [stdout]     |
[INFO] [stdout] 53  | /     panic::catch_unwind(|| {
[INFO] [stdout] 54  | |         let mut engine = match matches.values_of("server") {
[INFO] [stdout] 55  | |             Some(ip) => acestream::Engine::new(&format!("http://{}:6878", ip.collect::<String>())),
[INFO] [stdout] 56  | |             None => Default::default(),
[INFO] [stdout] ...   |
[INFO] [stdout] 128 | |     })
[INFO] [stdout] 129 | |     .is_ok();
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "980bf2514ddacbd844cde774b537ff3aae69c7599e3e49bb5628e24de59b714f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "980bf2514ddacbd844cde774b537ff3aae69c7599e3e49bb5628e24de59b714f", kill_on_drop: false }`
[INFO] [stdout] 980bf2514ddacbd844cde774b537ff3aae69c7599e3e49bb5628e24de59b714f