[INFO] fetching crate pandoc_ast 0.7.3...
[INFO] checking pandoc_ast-0.7.3 against beta for pr-78714
[INFO] extracting crate pandoc_ast 0.7.3 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate pandoc_ast 0.7.3 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 pandoc_ast 0.7.3
[INFO] finished tweaking crates.io crate pandoc_ast 0.7.3
[INFO] tweaked toml for crates.io crate pandoc_ast 0.7.3 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate pandoc_ast 0.7.3 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-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" "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] 54be036fcdf407eb091e9332b40c753ec493a24cd2db4f574c21b993eb49378c
[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" "54be036fcdf407eb091e9332b40c753ec493a24cd2db4f574c21b993eb49378c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "54be036fcdf407eb091e9332b40c753ec493a24cd2db4f574c21b993eb49378c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54be036fcdf407eb091e9332b40c753ec493a24cd2db4f574c21b993eb49378c", kill_on_drop: false }`
[INFO] [stdout] 54be036fcdf407eb091e9332b40c753ec493a24cd2db4f574c21b993eb49378c
[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=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] b82d1f51e464520180f03b728c11d9088f7a62e4febff13a9d5deb151a19c92e
[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" "b82d1f51e464520180f03b728c11d9088f7a62e4febff13a9d5deb151a19c92e", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.89
[INFO] [stderr]    Compiling syn v0.15.29
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]     Checking itoa v0.4.3
[INFO] [stderr]    Compiling serde_derive v1.0.89
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]     Checking pandoc_ast v0.7.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.35s
[INFO] running `Command { std: "docker" "inspect" "b82d1f51e464520180f03b728c11d9088f7a62e4febff13a9d5deb151a19c92e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b82d1f51e464520180f03b728c11d9088f7a62e4febff13a9d5deb151a19c92e", kill_on_drop: false }`
[INFO] [stdout] b82d1f51e464520180f03b728c11d9088f7a62e4febff13a9d5deb151a19c92e