[INFO] fetching crate recfiles 0.1.0...
[INFO] testing recfiles-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate recfiles 0.1.0 into /workspace/builds/worker-56/source
[INFO] validating manifest of crates.io crate recfiles 0.1.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate recfiles 0.1.0
[INFO] finished tweaking crates.io crate recfiles 0.1.0
[INFO] tweaked toml for crates.io crate recfiles 0.1.0 written to /workspace/builds/worker-56/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dc7cf3995f1810ef39cfacf37136870873590b2cb8d223b344ac6d01f3119399
[INFO] running `Command { std: "docker" "start" "-a" "dc7cf3995f1810ef39cfacf37136870873590b2cb8d223b344ac6d01f3119399", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dc7cf3995f1810ef39cfacf37136870873590b2cb8d223b344ac6d01f3119399", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc7cf3995f1810ef39cfacf37136870873590b2cb8d223b344ac6d01f3119399", kill_on_drop: false }`
[INFO] [stdout] dc7cf3995f1810ef39cfacf37136870873590b2cb8d223b344ac6d01f3119399
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 530ef0643bab6ef67b4ee7918c5d7c7453c2cfd339fff9071691fc57ac9c364b
[INFO] running `Command { std: "docker" "start" "-a" "530ef0643bab6ef67b4ee7918c5d7c7453c2cfd339fff9071691fc57ac9c364b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling recfiles v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.32s
[INFO] running `Command { std: "docker" "inspect" "530ef0643bab6ef67b4ee7918c5d7c7453c2cfd339fff9071691fc57ac9c364b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "530ef0643bab6ef67b4ee7918c5d7c7453c2cfd339fff9071691fc57ac9c364b", kill_on_drop: false }`
[INFO] [stdout] 530ef0643bab6ef67b4ee7918c5d7c7453c2cfd339fff9071691fc57ac9c364b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70be19cb30de022db1ffad797b6dbefd8670a516118d10c487133b8c82feb178
[INFO] running `Command { std: "docker" "start" "-a" "70be19cb30de022db1ffad797b6dbefd8670a516118d10c487133b8c82feb178", kill_on_drop: false }`
[INFO] [stderr]    Compiling recfiles v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `serde_rec`
[INFO] [stdout]   --> src/descriptor.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     extern crate serde_rec;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `recfiles` due to 2 previous errors
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "70be19cb30de022db1ffad797b6dbefd8670a516118d10c487133b8c82feb178", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70be19cb30de022db1ffad797b6dbefd8670a516118d10c487133b8c82feb178", kill_on_drop: false }`
[INFO] [stdout] 70be19cb30de022db1ffad797b6dbefd8670a516118d10c487133b8c82feb178