[INFO] fetching crate dynamic-cast 0.2.0...
[INFO] checking dynamic-cast-0.2.0 against 34f4a807e2d84184fff4e42d4539092569b6fcd6 for pr-164081
[INFO] extracting crate dynamic-cast 0.2.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate dynamic-cast 0.2.0
[INFO] finished tweaking crates.io crate dynamic-cast 0.2.0
[INFO] tweaked toml for crates.io crate dynamic-cast 0.2.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate dynamic-cast 0.2.0 on toolchain 34f4a807e2d84184fff4e42d4539092569b6fcd6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+34f4a807e2d84184fff4e42d4539092569b6fcd6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate dynamic-cast 0.2.0 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" "+34f4a807e2d84184fff4e42d4539092569b6fcd6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded arraybox v0.1.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 4b0c476e8b2a043bdb17e25a3f2e2808738fbe8d04181065983dc8c57ee48ab1
[INFO] running `Command { std: "docker" "start" "4b0c476e8b2a043bdb17e25a3f2e2808738fbe8d04181065983dc8c57ee48ab1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b0c476e8b2a043bdb17e25a3f2e2808738fbe8d04181065983dc8c57ee48ab1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "4b0c476e8b2a043bdb17e25a3f2e2808738fbe8d04181065983dc8c57ee48ab1" "/opt/rustwide/cargo-home/bin/cargo" "+34f4a807e2d84184fff4e42d4539092569b6fcd6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b0c476e8b2a043bdb17e25a3f2e2808738fbe8d04181065983dc8c57ee48ab1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "4b0c476e8b2a043bdb17e25a3f2e2808738fbe8d04181065983dc8c57ee48ab1" "/opt/rustwide/cargo-home/bin/cargo" "+34f4a807e2d84184fff4e42d4539092569b6fcd6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking arraybox v0.1.4
[INFO] [stderr]     Checking downcast-rs v2.0.1
[INFO] [stderr]     Checking dynamic-cast v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `allocator_api` has been partially stabilized since 1.100.0 and is succeeded by the feature `allocator_ext`
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(allocator_api)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] help: if you are using features which are still unstable, change to using `allocator_ext`
[INFO] [stdout]   |
[INFO] [stdout] 1 - #![feature(allocator_api)]
[INFO] [stdout] 1 + #![feature(allocator_ext)]
[INFO] [stdout]   |
[INFO] [stdout] help: if you are using features which are now stable, remove this line
[INFO] [stdout]   |
[INFO] [stdout] 1 - #![feature(allocator_api)]
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `allocator_api` has been partially stabilized since 1.100.0 and is succeeded by the feature `allocator_ext`
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(allocator_api)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] help: if you are using features which are still unstable, change to using `allocator_ext`
[INFO] [stdout]   |
[INFO] [stdout] 1 - #![feature(allocator_api)]
[INFO] [stdout] 1 + #![feature(allocator_ext)]
[INFO] [stdout]   |
[INFO] [stdout] help: if you are using features which are now stable, remove this line
[INFO] [stdout]   |
[INFO] [stdout] 1 - #![feature(allocator_api)]
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "4b0c476e8b2a043bdb17e25a3f2e2808738fbe8d04181065983dc8c57ee48ab1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b0c476e8b2a043bdb17e25a3f2e2808738fbe8d04181065983dc8c57ee48ab1", kill_on_drop: false }`
[INFO] [stdout] 4b0c476e8b2a043bdb17e25a3f2e2808738fbe8d04181065983dc8c57ee48ab1