[INFO] fetching crate protobuf 2.18.1...
[INFO] testing protobuf-2.18.1 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate protobuf 2.18.1 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate protobuf 2.18.1 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate protobuf 2.18.1
[INFO] finished tweaking crates.io crate protobuf 2.18.1
[INFO] tweaked toml for crates.io crate protobuf 2.18.1 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 972c5f6d8f8c6b7f8a163a31d63e9b490d04ff18a44f64b84885404e19c166e2
[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" "972c5f6d8f8c6b7f8a163a31d63e9b490d04ff18a44f64b84885404e19c166e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "972c5f6d8f8c6b7f8a163a31d63e9b490d04ff18a44f64b84885404e19c166e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "972c5f6d8f8c6b7f8a163a31d63e9b490d04ff18a44f64b84885404e19c166e2", kill_on_drop: false }`
[INFO] [stdout] 972c5f6d8f8c6b7f8a163a31d63e9b490d04ff18a44f64b84885404e19c166e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--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] 32bff865d26ffc76c339ecbdf798d7d662f7eea3c4c1a03fb1a5e45290de4e5d
[INFO] running `Command { std: "docker" "start" "-a" "32bff865d26ffc76c339ecbdf798d7d662f7eea3c4c1a03fb1a5e45290de4e5d", kill_on_drop: false }`
[INFO] [stderr]    Compiling protobuf v2.18.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.31s
[INFO] running `Command { std: "docker" "inspect" "32bff865d26ffc76c339ecbdf798d7d662f7eea3c4c1a03fb1a5e45290de4e5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32bff865d26ffc76c339ecbdf798d7d662f7eea3c4c1a03fb1a5e45290de4e5d", kill_on_drop: false }`
[INFO] [stdout] 32bff865d26ffc76c339ecbdf798d7d662f7eea3c4c1a03fb1a5e45290de4e5d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5b98edbdeb5e77e63a928f5b435fe92b17a663027069779306cc3a0287c9726f
[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" "5b98edbdeb5e77e63a928f5b435fe92b17a663027069779306cc3a0287c9726f", kill_on_drop: false }`
[INFO] [stderr]    Compiling protobuf v2.18.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: couldn't read src/../../protobuf-test-common/src/hex.rs: No such file or directory (os error 2)
[INFO] [stdout]   --> src/lib.rs:71:1
[INFO] [stdout]    |
[INFO] [stdout] 71 | mod hex;
[INFO] [stdout]    | ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `protobuf`
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "5b98edbdeb5e77e63a928f5b435fe92b17a663027069779306cc3a0287c9726f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b98edbdeb5e77e63a928f5b435fe92b17a663027069779306cc3a0287c9726f", kill_on_drop: false }`
[INFO] [stdout] 5b98edbdeb5e77e63a928f5b435fe92b17a663027069779306cc3a0287c9726f