[INFO] fetching crate semver-parser 0.10.1...
[INFO] checking semver-parser-0.10.1 against beta for pr-78714
[INFO] extracting crate semver-parser 0.10.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate semver-parser 0.10.1 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 semver-parser 0.10.1
[INFO] finished tweaking crates.io crate semver-parser 0.10.1
[INFO] tweaked toml for crates.io crate semver-parser 0.10.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate semver-parser 0.10.1 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-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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8baea0b255f08ac048fac6b1bc7b8f4030b6b0d662bfa8168c5de82ae0d33a74
[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" "8baea0b255f08ac048fac6b1bc7b8f4030b6b0d662bfa8168c5de82ae0d33a74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8baea0b255f08ac048fac6b1bc7b8f4030b6b0d662bfa8168c5de82ae0d33a74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8baea0b255f08ac048fac6b1bc7b8f4030b6b0d662bfa8168c5de82ae0d33a74", kill_on_drop: false }`
[INFO] [stdout] 8baea0b255f08ac048fac6b1bc7b8f4030b6b0d662bfa8168c5de82ae0d33a74
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f636e10f80c54128772c1404904b233c8f2d960473ae72314375aa071bc285cb
[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" "f636e10f80c54128772c1404904b233c8f2d960473ae72314375aa071bc285cb", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.45
[INFO] [stderr]     Checking semver-parser v0.10.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking pest_meta v2.1.3
[INFO] [stderr]     Checking pest_generator v2.1.3
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.18s
[INFO] running `Command { std: "docker" "inspect" "f636e10f80c54128772c1404904b233c8f2d960473ae72314375aa071bc285cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f636e10f80c54128772c1404904b233c8f2d960473ae72314375aa071bc285cb", kill_on_drop: false }`
[INFO] [stdout] f636e10f80c54128772c1404904b233c8f2d960473ae72314375aa071bc285cb