[INFO] fetching crate downcast 0.11.0...
[INFO] checking downcast-0.11.0 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate downcast 0.11.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate downcast 0.11.0
[INFO] finished tweaking crates.io crate downcast 0.11.0
[INFO] tweaked toml for crates.io crate downcast 0.11.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate downcast 0.11.0 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate downcast 0.11.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3caa113be1afa6d2c29662f60787fe21516989e7b96f38e566c0c694e0b9930d
[INFO] running `Command { std: "docker" "start" "-a" "3caa113be1afa6d2c29662f60787fe21516989e7b96f38e566c0c694e0b9930d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3caa113be1afa6d2c29662f60787fe21516989e7b96f38e566c0c694e0b9930d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3caa113be1afa6d2c29662f60787fe21516989e7b96f38e566c0c694e0b9930d", kill_on_drop: false }`
[INFO] [stdout] 3caa113be1afa6d2c29662f60787fe21516989e7b96f38e566c0c694e0b9930d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 773332d7fad23f73d4bd36bf759bda622aa59f291eafdf57b73cd69cbc9cfde7
[INFO] running `Command { std: "docker" "start" "-a" "773332d7fad23f73d4bd36bf759bda622aa59f291eafdf57b73cd69cbc9cfde7", kill_on_drop: false }`
[INFO] [stderr]     Checking downcast v0.11.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "773332d7fad23f73d4bd36bf759bda622aa59f291eafdf57b73cd69cbc9cfde7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "773332d7fad23f73d4bd36bf759bda622aa59f291eafdf57b73cd69cbc9cfde7", kill_on_drop: false }`
[INFO] [stdout] 773332d7fad23f73d4bd36bf759bda622aa59f291eafdf57b73cd69cbc9cfde7