[INFO] fetching crate cast_trait_object 0.1.4...
[INFO] checking cast_trait_object-0.1.4 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate cast_trait_object 0.1.4 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate cast_trait_object 0.1.4
[INFO] finished tweaking crates.io crate cast_trait_object 0.1.4
[INFO] tweaked toml for crates.io crate cast_trait_object 0.1.4 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate cast_trait_object 0.1.4 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 14 packages to latest compatible versions
[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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cast_trait_object_macros v0.1.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] c7770cadaae41aca53f8961b7c02a7d0155d2291ee1b3644dfbc3516efaacc21
[INFO] running `Command { std: "docker" "start" "-a" "c7770cadaae41aca53f8961b7c02a7d0155d2291ee1b3644dfbc3516efaacc21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c7770cadaae41aca53f8961b7c02a7d0155d2291ee1b3644dfbc3516efaacc21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7770cadaae41aca53f8961b7c02a7d0155d2291ee1b3644dfbc3516efaacc21", kill_on_drop: false }`
[INFO] [stdout] c7770cadaae41aca53f8961b7c02a7d0155d2291ee1b3644dfbc3516efaacc21
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 95a1af4f796b26ff00544d55743b0fcf856d9825e16b7679885472bd9eb406bc
[INFO] running `Command { std: "docker" "start" "-a" "95a1af4f796b26ff00544d55743b0fcf856d9825e16b7679885472bd9eb406bc", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling proc-macro-crate v3.3.0
[INFO] [stderr]    Compiling cast_trait_object_macros v0.1.4
[INFO] [stderr]     Checking cast_trait_object v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `TestGenericMixed` is never constructed
[INFO] [stdout]     --> src/lib.rs:1729:12
[INFO] [stdout]      |
[INFO] [stdout] 1729 |     struct TestGenericMixed<T>(T);
[INFO] [stdout]      |            ^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TestSuper` is never constructed
[INFO] [stdout]     --> src/lib.rs:1778:16
[INFO] [stdout]      |
[INFO] [stdout] 1778 |         struct TestSuper;
[INFO] [stdout]      |                ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TestSub` is never constructed
[INFO] [stdout]     --> src/lib.rs:1782:16
[INFO] [stdout]      |
[INFO] [stdout] 1782 |         struct TestSub;
[INFO] [stdout]      |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.18s
[INFO] running `Command { std: "docker" "inspect" "95a1af4f796b26ff00544d55743b0fcf856d9825e16b7679885472bd9eb406bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95a1af4f796b26ff00544d55743b0fcf856d9825e16b7679885472bd9eb406bc", kill_on_drop: false }`
[INFO] [stdout] 95a1af4f796b26ff00544d55743b0fcf856d9825e16b7679885472bd9eb406bc