[INFO] fetching crate dogear 0.4.0...
[INFO] checking dogear-0.4.0 against beta for pr-78714
[INFO] extracting crate dogear 0.4.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate dogear 0.4.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dogear 0.4.0
[INFO] finished tweaking crates.io crate dogear 0.4.0
[INFO] tweaked toml for crates.io crate dogear 0.4.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3dbd2d6c2441750a170e824639699a9f47c2d096ad5d8afcfb517fe1420006bb
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3dbd2d6c2441750a170e824639699a9f47c2d096ad5d8afcfb517fe1420006bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3dbd2d6c2441750a170e824639699a9f47c2d096ad5d8afcfb517fe1420006bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dbd2d6c2441750a170e824639699a9f47c2d096ad5d8afcfb517fe1420006bb", kill_on_drop: false }`
[INFO] [stdout] 3dbd2d6c2441750a170e824639699a9f47c2d096ad5d8afcfb517fe1420006bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 153ead6a19dfe722015324aaee0c59e31279dff91eba64397379858b6936b7a5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "153ead6a19dfe722015324aaee0c59e31279dff91eba64397379858b6936b7a5", kill_on_drop: false }`
[INFO] [stderr]     Checking smallbitvec v2.5.0
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking dogear v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]     --> src/merge.rs:1683:13
[INFO] [stdout]      |
[INFO] [stdout] 1683 | /             mem::replace(
[INFO] [stdout] 1684 | |                 &mut self.matching_dupes_by_local_parent_guid,
[INFO] [stdout] 1685 | |                 matching_dupes_by_local_parent_guid,
[INFO] [stdout] 1686 | |             );
[INFO] [stdout]      | |______________^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]      = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]     --> src/merge.rs:1742:13
[INFO] [stdout]      |
[INFO] [stdout] 1742 | /             mem::replace(
[INFO] [stdout] 1743 | |                 &mut self.matching_dupes_by_local_parent_guid,
[INFO] [stdout] 1744 | |                 matching_dupes_by_local_parent_guid,
[INFO] [stdout] 1745 | |             );
[INFO] [stdout]      | |______________^
[INFO] [stdout]      |
[INFO] [stdout]      = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/tree.rs:488:9
[INFO] [stdout]     |
[INFO] [stdout] 488 |         mem::replace(&mut self.0.entries[self.1].content, Some(content));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/tree.rs:658:17
[INFO] [stdout]     |
[INFO] [stdout] 658 |                 mem::replace(&mut self.parent, BuilderEntryParent::Root);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/tree.rs:686:9
[INFO] [stdout]     |
[INFO] [stdout] 686 |         mem::replace(&mut self.parent, new_parent);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]     --> src/merge.rs:1683:13
[INFO] [stdout]      |
[INFO] [stdout] 1683 | /             mem::replace(
[INFO] [stdout] 1684 | |                 &mut self.matching_dupes_by_local_parent_guid,
[INFO] [stdout] 1685 | |                 matching_dupes_by_local_parent_guid,
[INFO] [stdout] 1686 | |             );
[INFO] [stdout]      | |______________^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]      = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]     --> src/merge.rs:1742:13
[INFO] [stdout]      |
[INFO] [stdout] 1742 | /             mem::replace(
[INFO] [stdout] 1743 | |                 &mut self.matching_dupes_by_local_parent_guid,
[INFO] [stdout] 1744 | |                 matching_dupes_by_local_parent_guid,
[INFO] [stdout] 1745 | |             );
[INFO] [stdout]      | |______________^
[INFO] [stdout]      |
[INFO] [stdout]      = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/tree.rs:488:9
[INFO] [stdout]     |
[INFO] [stdout] 488 |         mem::replace(&mut self.0.entries[self.1].content, Some(content));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/tree.rs:658:17
[INFO] [stdout]     |
[INFO] [stdout] 658 |                 mem::replace(&mut self.parent, BuilderEntryParent::Root);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/tree.rs:686:9
[INFO] [stdout]     |
[INFO] [stdout] 686 |         mem::replace(&mut self.parent, new_parent);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.41s
[INFO] running `Command { std: "docker" "inspect" "153ead6a19dfe722015324aaee0c59e31279dff91eba64397379858b6936b7a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "153ead6a19dfe722015324aaee0c59e31279dff91eba64397379858b6936b7a5", kill_on_drop: false }`
[INFO] [stdout] 153ead6a19dfe722015324aaee0c59e31279dff91eba64397379858b6936b7a5