[INFO] fetching crate polyhorn 0.3.2...
[INFO] checking polyhorn-0.3.2 against beta for pr-78714
[INFO] extracting crate polyhorn 0.3.2 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate polyhorn 0.3.2 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate polyhorn 0.3.2
[INFO] finished tweaking crates.io crate polyhorn 0.3.2
[INFO] tweaked toml for crates.io crate polyhorn 0.3.2 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate polyhorn 0.3.2 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] 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" "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] 737d579898d329ba951160927d65f88025520323bca9dbafcb9a116dda9a7bf1
[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" "737d579898d329ba951160927d65f88025520323bca9dbafcb9a116dda9a7bf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "737d579898d329ba951160927d65f88025520323bca9dbafcb9a116dda9a7bf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "737d579898d329ba951160927d65f88025520323bca9dbafcb9a116dda9a7bf1", kill_on_drop: false }`
[INFO] [stdout] 737d579898d329ba951160927d65f88025520323bca9dbafcb9a116dda9a7bf1
[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" "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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 358ad99293b73e3a8e01f64b66eafcabeda1593ae946823235f3dcecb97957af
[INFO] running `Command { std: "docker" "start" "-a" "358ad99293b73e3a8e01f64b66eafcabeda1593ae946823235f3dcecb97957af", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.45
[INFO] [stderr]     Checking futures-sink v0.3.6
[INFO] [stderr]     Checking semver-parser v0.10.1
[INFO] [stderr]    Compiling polyhorn-macros v0.3.2
[INFO] [stderr]     Checking futures-channel v0.3.6
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]    Compiling futures-macro v0.3.6
[INFO] [stderr]     Checking pin-project v0.4.27
[INFO] [stderr]     Checking futures-util v0.3.6
[INFO] [stderr]     Checking serde v1.0.117
[INFO] [stderr]     Checking futures-executor v0.3.6
[INFO] [stderr]     Checking futures v0.3.6
[INFO] [stderr]     Checking semver v0.11.0
[INFO] [stderr]     Checking toml v0.5.7
[INFO] [stderr]     Checking polyhorn-core v0.3.2
[INFO] [stderr]     Checking cargo-lock v6.0.0
[INFO] [stderr]     Checking polyhorn v0.3.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 56.35s
[INFO] running `Command { std: "docker" "inspect" "358ad99293b73e3a8e01f64b66eafcabeda1593ae946823235f3dcecb97957af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "358ad99293b73e3a8e01f64b66eafcabeda1593ae946823235f3dcecb97957af", kill_on_drop: false }`
[INFO] [stdout] 358ad99293b73e3a8e01f64b66eafcabeda1593ae946823235f3dcecb97957af