[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] checking chocol4te/crankshaft against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchocol4te%2Fcrankshaft" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chocol4te/crankshaft on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-9/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-9/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" "+beta" "fetch" "--locked" "--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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ddd11ce468ea07efe8c4b09e7eb41041247d75aecffe918c76c292517201617b
[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" "ddd11ce468ea07efe8c4b09e7eb41041247d75aecffe918c76c292517201617b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ddd11ce468ea07efe8c4b09e7eb41041247d75aecffe918c76c292517201617b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddd11ce468ea07efe8c4b09e7eb41041247d75aecffe918c76c292517201617b", kill_on_drop: false }`
[INFO] [stdout] ddd11ce468ea07efe8c4b09e7eb41041247d75aecffe918c76c292517201617b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ce3e6ecdf35a45a9aaec8ead2e496097d1d976951d8d642b6a0a07e3008fb3bb
[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" "ce3e6ecdf35a45a9aaec8ead2e496097d1d976951d8d642b6a0a07e3008fb3bb", kill_on_drop: false }`
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling syn v0.15.29
[INFO] [stderr]    Compiling cortex-m v0.6.1
[INFO] [stderr]     Checking vcell v0.1.0
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling cortex-m v0.5.10
[INFO] [stderr]     Checking aligned v0.2.0
[INFO] [stderr]    Compiling cortex-m-rt v0.6.11
[INFO] [stderr]    Compiling alloc-no-stdlib v2.0.1
[INFO] [stderr]     Checking r0 v0.2.2
[INFO] [stderr]    Compiling heapless v0.4.4
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling stm32f4 v0.6.0
[INFO] [stderr]     Checking nb v0.1.1
[INFO] [stderr]    Compiling cortex-m-rtfm v0.4.3
[INFO] [stderr]     Checking managed v0.7.1
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]    Compiling heapless v0.5.1
[INFO] [stderr]     Checking cast v0.2.2
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]    Compiling cortex-m-semihosting v0.3.2
[INFO] [stderr]     Checking volatile-register v0.2.0
[INFO] [stderr]     Checking embedded-hal v0.2.3
[INFO] [stderr]    Compiling alloc-stdlib v0.2.1
[INFO] [stderr]    Compiling bare-metal v0.2.4
[INFO] [stderr]    Compiling brotli-decompressor v2.3.0
[INFO] [stderr]     Checking hash32 v0.1.0
[INFO] [stderr]     Checking smoltcp v0.5.0
[INFO] [stderr]     Checking generic-array v0.12.0
[INFO] [stderr]     Checking generic-array v0.11.1
[INFO] [stderr]     Checking generic-array v0.13.2
[INFO] [stderr]     Checking as-slice v0.1.0
[INFO] [stderr]     Checking aligned v0.3.2
[INFO] [stderr]     Checking owning-slice v0.1.0 (https://github.com/japaric/owning-slice#f8c70ead)
[INFO] [stderr]    Compiling brotli v3.3.0
[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" "ce3e6ecdf35a45a9aaec8ead2e496097d1d976951d8d642b6a0a07e3008fb3bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce3e6ecdf35a45a9aaec8ead2e496097d1d976951d8d642b6a0a07e3008fb3bb", kill_on_drop: false }`
[INFO] [stdout] ce3e6ecdf35a45a9aaec8ead2e496097d1d976951d8d642b6a0a07e3008fb3bb