[INFO] cloning repository https://github.com/chocol4te/crankshaft
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chocol4te/crankshaft" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchocol4te%2Fcrankshaft", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchocol4te%2Fcrankshaft'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a3802402a71b0865833c3b4198c3d23c816f0402
[INFO] testing chocol4te/crankshaft against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchocol4te%2Fcrankshaft" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chocol4te/crankshaft on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2/source/.cargo/config
[INFO] started tweaking git repo https://github.com/chocol4te/crankshaft
[INFO] finished tweaking git repo https://github.com/chocol4te/crankshaft
[INFO] tweaked toml for git repo https://github.com/chocol4te/crankshaft written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/chocol4te/crankshaft already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded owned-singleton v0.1.0
[INFO] [stderr]   Downloaded owned-singleton-macros v0.1.0
[INFO] [stderr]   Downloaded panic-semihosting v0.5.3
[INFO] [stderr]   Downloaded hash32 v0.1.0
[INFO] [stderr]   Downloaded cortex-m-rtfm-macros v0.4.3
[INFO] [stderr]   Downloaded heapless v0.5.1
[INFO] [stderr]   Downloaded managed v0.7.1
[INFO] [stderr]   Downloaded cortex-m v0.6.1
[INFO] [stderr]   Downloaded smoltcp v0.5.0
[INFO] [stderr]   Downloaded stm32f4xx-hal v0.3.0
[INFO] [stderr]   Downloaded cortex-m-rtfm v0.4.3
[INFO] [stderr]   Downloaded stm32f4 v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2afa8a40b4c400fcfe062b815a2e19f749e57c401a70d317b96c2534429476ea
[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" "2afa8a40b4c400fcfe062b815a2e19f749e57c401a70d317b96c2534429476ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2afa8a40b4c400fcfe062b815a2e19f749e57c401a70d317b96c2534429476ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2afa8a40b4c400fcfe062b815a2e19f749e57c401a70d317b96c2534429476ea", kill_on_drop: false }`
[INFO] [stdout] 2afa8a40b4c400fcfe062b815a2e19f749e57c401a70d317b96c2534429476ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09f7b1d2291680be0595388139f512105d27ea0ee21aa79b86f156d692f0a973
[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" "09f7b1d2291680be0595388139f512105d27ea0ee21aa79b86f156d692f0a973", kill_on_drop: false }`
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling syn v0.15.29
[INFO] [stderr]    Compiling rand_core v0.4.0
[INFO] [stderr]    Compiling cortex-m v0.6.1
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling vcell v0.1.0
[INFO] [stderr]    Compiling aligned v0.2.0
[INFO] [stderr]    Compiling alloc-no-stdlib v2.0.1
[INFO] [stderr]    Compiling cortex-m-rt v0.6.11
[INFO] [stderr]    Compiling r0 v0.2.2
[INFO] [stderr]    Compiling stm32f4 v0.6.0
[INFO] [stderr]    Compiling cortex-m-semihosting v0.3.2
[INFO] [stderr]    Compiling heapless v0.4.4
[INFO] [stderr]    Compiling nb v0.1.1
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling heapless v0.5.1
[INFO] [stderr]    Compiling cast v0.2.2
[INFO] [stderr]    Compiling cortex-m-rtfm v0.4.3
[INFO] [stderr]    Compiling managed v0.7.1
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]    Compiling volatile-register v0.2.0
[INFO] [stderr]    Compiling alloc-stdlib v0.2.1
[INFO] [stderr]    Compiling embedded-hal v0.2.3
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling bare-metal v0.2.4
[INFO] [stderr]    Compiling brotli-decompressor v2.3.0
[INFO] [stderr]    Compiling cortex-m v0.5.10
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling hash32 v0.1.0
[INFO] [stderr]    Compiling smoltcp v0.5.0
[INFO] [stderr]    Compiling generic-array v0.12.0
[INFO] [stderr]    Compiling generic-array v0.11.1
[INFO] [stderr]    Compiling generic-array v0.13.2
[INFO] [stderr]    Compiling as-slice v0.1.0
[INFO] [stderr]    Compiling brotli v3.3.0
[INFO] [stderr]    Compiling aligned v0.3.2
[INFO] [stderr]    Compiling owning-slice v0.1.0 (https://github.com/japaric/owning-slice#f8c70ead)
[INFO] [stdout] error[E0713]: borrow may still be in use when destructor runs
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/smoltcp-0.5.0/src/socket/ref_.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 39 | impl<'a, T: Session + 'a> Ref<'a, T> {
[INFO] [stdout]    |      -- lifetime `'a` defined here
[INFO] [stdout] ...
[INFO] [stdout] 61 |         ref_.socket
[INFO] [stdout]    |         ^^^^^^^^^^^ returning this value requires that `*ref_.socket` is borrowed for `'a`
[INFO] [stdout] 62 |     }
[INFO] [stdout]    |     - here, drop of `ref_` needs exclusive access to `*ref_.socket`, because the type `ref_::Ref<'_, T>` implements the `Drop` trait
[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 E0713`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `smoltcp`
[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] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "09f7b1d2291680be0595388139f512105d27ea0ee21aa79b86f156d692f0a973", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09f7b1d2291680be0595388139f512105d27ea0ee21aa79b86f156d692f0a973", kill_on_drop: false }`
[INFO] [stdout] 09f7b1d2291680be0595388139f512105d27ea0ee21aa79b86f156d692f0a973
