[INFO] fetching crate polar-prost 0.1.0...
[INFO] checking polar-prost-0.1.0 against master#a874956d940ecb3ed524b6176a171219ac4787ea for pr-76104
[INFO] extracting crate polar-prost 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate polar-prost 0.1.0 on toolchain a874956d940ecb3ed524b6176a171219ac4787ea
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate polar-prost 0.1.0
[INFO] finished tweaking crates.io crate polar-prost 0.1.0
[INFO] tweaked toml for crates.io crate polar-prost 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "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" "+a874956d940ecb3ed524b6176a171219ac4787ea" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+a874956d940ecb3ed524b6176a171219ac4787ea" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cbd643b04f9fd7d23b110a6030f4b3ba233aae61c0534d8def1e17c58131f27b
[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" "cbd643b04f9fd7d23b110a6030f4b3ba233aae61c0534d8def1e17c58131f27b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cbd643b04f9fd7d23b110a6030f4b3ba233aae61c0534d8def1e17c58131f27b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cbd643b04f9fd7d23b110a6030f4b3ba233aae61c0534d8def1e17c58131f27b", kill_on_drop: false }`
[INFO] [stdout] cbd643b04f9fd7d23b110a6030f4b3ba233aae61c0534d8def1e17c58131f27b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+a874956d940ecb3ed524b6176a171219ac4787ea" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0a5342448c38cf77e6f261fa5ce920ad7b5f0f15967fdc8bcbd7e5f8d9396f66
[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" "0a5342448c38cf77e6f261fa5ce920ad7b5f0f15967fdc8bcbd7e5f8d9396f66", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling polar-prost v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling miniz_oxide v0.4.2
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]    Compiling backtrace v0.3.50
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling prost-derive v0.5.0
[INFO] [stderr]     Checking prost v0.5.0
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 40.73s
[INFO] running `Command { std: "docker" "inspect" "0a5342448c38cf77e6f261fa5ce920ad7b5f0f15967fdc8bcbd7e5f8d9396f66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a5342448c38cf77e6f261fa5ce920ad7b5f0f15967fdc8bcbd7e5f8d9396f66", kill_on_drop: false }`
[INFO] [stdout] 0a5342448c38cf77e6f261fa5ce920ad7b5f0f15967fdc8bcbd7e5f8d9396f66