[INFO] fetching crate concurrent-list 0.0.2...
[INFO] checking concurrent-list-0.0.2 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate concurrent-list 0.0.2 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate concurrent-list 0.0.2 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "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-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4c3356594ffc608454b60f6cb6195a8198b6c8dc2cf17492a4089d5e2020bfd6
[INFO] running `Command { std: "docker" "start" "-a" "4c3356594ffc608454b60f6cb6195a8198b6c8dc2cf17492a4089d5e2020bfd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c3356594ffc608454b60f6cb6195a8198b6c8dc2cf17492a4089d5e2020bfd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c3356594ffc608454b60f6cb6195a8198b6c8dc2cf17492a4089d5e2020bfd6", kill_on_drop: false }`
[INFO] [stdout] 4c3356594ffc608454b60f6cb6195a8198b6c8dc2cf17492a4089d5e2020bfd6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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 -Dtail_expr_drop_order" "-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1bdd7236c535c53a62fc3d3dd4b5dfaf6370921004944ce48bd6efbfb78057a4
[INFO] running `Command { std: "docker" "start" "-a" "1bdd7236c535c53a62fc3d3dd4b5dfaf6370921004944ce48bd6efbfb78057a4", 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: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: 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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "1bdd7236c535c53a62fc3d3dd4b5dfaf6370921004944ce48bd6efbfb78057a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bdd7236c535c53a62fc3d3dd4b5dfaf6370921004944ce48bd6efbfb78057a4", kill_on_drop: false }`
[INFO] [stdout] 1bdd7236c535c53a62fc3d3dd4b5dfaf6370921004944ce48bd6efbfb78057a4