[INFO] fetching crate concurrent-list 0.0.2...
[INFO] checking concurrent-list-0.0.2 against master#f167efad2f51088d86180ee89177b3d7c9e7c2f5 for pr-129543
[INFO] extracting crate concurrent-list 0.0.2 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate concurrent-list 0.0.2 on toolchain f167efad2f51088d86180ee89177b3d7c9e7c2f5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate concurrent-list 0.0.2
[INFO] finished tweaking crates.io crate concurrent-list 0.0.2
[INFO] tweaked toml for crates.io crate concurrent-list 0.0.2 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7b509f46839d8ec27a0cb513f2551104cbf47c27a0ff4265b61cb78c80c2df60
[INFO] running `Command { std: "docker" "start" "-a" "7b509f46839d8ec27a0cb513f2551104cbf47c27a0ff4265b61cb78c80c2df60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b509f46839d8ec27a0cb513f2551104cbf47c27a0ff4265b61cb78c80c2df60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b509f46839d8ec27a0cb513f2551104cbf47c27a0ff4265b61cb78c80c2df60", kill_on_drop: false }`
[INFO] [stdout] 7b509f46839d8ec27a0cb513f2551104cbf47c27a0ff4265b61cb78c80c2df60
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 21b25bb694785fabc50904658aeb1fb98d0c76745fcda220ded8230f9766d241
[INFO] running `Command { std: "docker" "start" "-a" "21b25bb694785fabc50904658aeb1fb98d0c76745fcda220ded8230f9766d241", kill_on_drop: false }`
[INFO] [stderr]     Checking concurrent-list v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/lib.rs:347:22
[INFO] [stdout]     |
[INFO] [stdout] 347 |             unsafe { Box::from_raw(node) };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 347 |             unsafe { let _ = Box::from_raw(node); };
[INFO] [stdout]     |                      +++++++                    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/lib.rs:347:22
[INFO] [stdout]     |
[INFO] [stdout] 347 |             unsafe { Box::from_raw(node) };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 347 |             unsafe { let _ = Box::from_raw(node); };
[INFO] [stdout]     |                      +++++++                    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/lib.rs:368:22
[INFO] [stdout]     |
[INFO] [stdout] 368 |             unsafe { Box::from_raw(node) };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 368 |             unsafe { let _ = Box::from_raw(node); };
[INFO] [stdout]     |                      +++++++                    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/lib.rs:368:22
[INFO] [stdout]     |
[INFO] [stdout] 368 |             unsafe { Box::from_raw(node) };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 368 |             unsafe { let _ = Box::from_raw(node); };
[INFO] [stdout]     |                      +++++++                    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "21b25bb694785fabc50904658aeb1fb98d0c76745fcda220ded8230f9766d241", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21b25bb694785fabc50904658aeb1fb98d0c76745fcda220ded8230f9766d241", kill_on_drop: false }`
[INFO] [stdout] 21b25bb694785fabc50904658aeb1fb98d0c76745fcda220ded8230f9766d241