[INFO] fetching crate flowclib 0.8.8...
[INFO] checking flowclib-0.8.8 against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] extracting crate flowclib 0.8.8 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate flowclib 0.8.8 on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "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-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e6b9c6da1554048a69f82db6c101364a6cf0879a301b906aa21180fa0b4a6986
[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" "e6b9c6da1554048a69f82db6c101364a6cf0879a301b906aa21180fa0b4a6986", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e6b9c6da1554048a69f82db6c101364a6cf0879a301b906aa21180fa0b4a6986", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6b9c6da1554048a69f82db6c101364a6cf0879a301b906aa21180fa0b4a6986", kill_on_drop: false }`
[INFO] [stdout] e6b9c6da1554048a69f82db6c101364a6cf0879a301b906aa21180fa0b4a6986
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef6f44a5603a7fc35ef5909e5bd335dbe4cf56dc3073fbaa72653740f5371b33
[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" "ef6f44a5603a7fc35ef5909e5bd335dbe4cf56dc3073fbaa72653740f5371b33", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling cc v1.0.69
[INFO] [stderr]     Checking gimli v0.24.0
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking rustc-demangle v0.1.20
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling erased-serde v0.3.16
[INFO] [stderr]     Checking dtoa v0.4.8
[INFO] [stderr]     Checking strfmt v0.1.6
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]     Checking parity-wasm v0.31.3
[INFO] [stderr]     Checking tinyvec v1.3.1
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]    Compiling standback v0.2.17
[INFO] [stderr]    Compiling time v0.2.27
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]     Checking object v0.25.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]    Compiling backtrace v0.3.60
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking wasmi-validation v0.1.0
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking wasmi v0.4.5
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking addr2line v0.15.2
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking multimap v0.5.0
[INFO] [stderr]     Checking serde_yaml v0.8.17
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking flow_impl v0.8.5
[INFO] [stderr]    Compiling time-macros-impl v0.1.2
[INFO] [stderr]    Compiling shrinkwraprs v0.2.3
[INFO] [stderr]     Checking time-macros v0.1.1
[INFO] [stderr]     Checking instant v0.1.10
[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 1m 22s
[INFO] running `Command { std: "docker" "inspect" "ef6f44a5603a7fc35ef5909e5bd335dbe4cf56dc3073fbaa72653740f5371b33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef6f44a5603a7fc35ef5909e5bd335dbe4cf56dc3073fbaa72653740f5371b33", kill_on_drop: false }`
[INFO] [stdout] ef6f44a5603a7fc35ef5909e5bd335dbe4cf56dc3073fbaa72653740f5371b33