[INFO] fetching crate flowclib 0.8.8...
[INFO] checking flowclib-0.8.8 against 1.55.0 for beta-1.56-3
[INFO] extracting crate flowclib 0.8.8 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate flowclib 0.8.8 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flowclib 0.8.8
[INFO] finished tweaking crates.io crate flowclib 0.8.8
[INFO] tweaked toml for crates.io crate flowclib 0.8.8 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f3cbef68db9f7b0c0298c3c29001778cd0e2c374c9dfbd5c1dcb6eab5a1cd632
[INFO] running `Command { std: "docker" "start" "-a" "f3cbef68db9f7b0c0298c3c29001778cd0e2c374c9dfbd5c1dcb6eab5a1cd632", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f3cbef68db9f7b0c0298c3c29001778cd0e2c374c9dfbd5c1dcb6eab5a1cd632", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3cbef68db9f7b0c0298c3c29001778cd0e2c374c9dfbd5c1dcb6eab5a1cd632", kill_on_drop: false }`
[INFO] [stdout] f3cbef68db9f7b0c0298c3c29001778cd0e2c374c9dfbd5c1dcb6eab5a1cd632
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 59cfa87c41a5c41aa3c5899e181c7c02988d82d7ad82c388e08e58bdcb5000be
[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" "59cfa87c41a5c41aa3c5899e181c7c02988d82d7ad82c388e08e58bdcb5000be", kill_on_drop: false }`
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking strfmt v0.1.6
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]     Checking multimap v0.5.0
[INFO] [stderr]     Checking erased-serde v0.3.16
[INFO] [stderr]     Checking flow_impl v0.8.5
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking instant v0.1.11
[INFO] [stderr]     Checking parity-wasm v0.31.3
[INFO] [stderr]    Compiling shrinkwraprs v0.2.3
[INFO] [stderr]     Checking wasmi-validation v0.1.0
[INFO] [stderr]     Checking wasmi v0.4.5
[INFO] [stderr]     Checking flowrlib v0.8.8
[INFO] [stderr]     Checking flowclib v0.8.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/model/flow.rs:320:9
[INFO] [stdout]     |
[INFO] [stdout] 320 |         replace(&mut self.connections, Some(connections));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/model/flow.rs:320:9
[INFO] [stdout]     |
[INFO] [stdout] 320 |         replace(&mut self.connections, Some(connections));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.80s
[INFO] running `Command { std: "docker" "inspect" "59cfa87c41a5c41aa3c5899e181c7c02988d82d7ad82c388e08e58bdcb5000be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59cfa87c41a5c41aa3c5899e181c7c02988d82d7ad82c388e08e58bdcb5000be", kill_on_drop: false }`
[INFO] [stdout] 59cfa87c41a5c41aa3c5899e181c7c02988d82d7ad82c388e08e58bdcb5000be
