[INFO] fetching crate id_tree 1.7.0...
[INFO] checking id_tree-1.7.0 against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] extracting crate id_tree 1.7.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate id_tree 1.7.0 on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate id_tree 1.7.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate id_tree 1.7.0
[INFO] tweaked toml for crates.io crate id_tree 1.7.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate id_tree 1.7.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 05a6b4896c0d08b6ff207f5b718c986268c2ac1bcfeb61157894f5e660a8fd59
[INFO] running `Command { std: "docker" "start" "-a" "05a6b4896c0d08b6ff207f5b718c986268c2ac1bcfeb61157894f5e660a8fd59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05a6b4896c0d08b6ff207f5b718c986268c2ac1bcfeb61157894f5e660a8fd59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05a6b4896c0d08b6ff207f5b718c986268c2ac1bcfeb61157894f5e660a8fd59", kill_on_drop: false }`
[INFO] [stdout] 05a6b4896c0d08b6ff207f5b718c986268c2ac1bcfeb61157894f5e660a8fd59
[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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 757444b2d582ddc4e2384b43dd96fbce8429b21d5175d88beeeda72a0de56f8f
[INFO] running `Command { std: "docker" "start" "-a" "757444b2d582ddc4e2384b43dd96fbce8429b21d5175d88beeeda72a0de56f8f", kill_on_drop: false }`
[INFO] [stderr]     Checking snowflake v1.3.0
[INFO] [stderr]     Checking id_tree v1.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/tree.rs:426:13
[INFO] [stdout]     |
[INFO] [stdout] 426 |             try!(self.remove_node_drop_children(child));
[INFO] [stdout]     |             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/tree.rs:550:13
[INFO] [stdout]     |
[INFO] [stdout] 550 |             try!(self.move_node_to_parent(&old_root, node_id));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/tree.rs:426:13
[INFO] [stdout]     |
[INFO] [stdout] 426 |             try!(self.remove_node_drop_children(child));
[INFO] [stdout]     |             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/tree.rs:550:13
[INFO] [stdout]     |
[INFO] [stdout] 550 |             try!(self.move_node_to_parent(&old_root, node_id));
[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 [unoptimized + debuginfo] target(s) in 2.51s
[INFO] running `Command { std: "docker" "inspect" "757444b2d582ddc4e2384b43dd96fbce8429b21d5175d88beeeda72a0de56f8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "757444b2d582ddc4e2384b43dd96fbce8429b21d5175d88beeeda72a0de56f8f", kill_on_drop: false }`
[INFO] [stdout] 757444b2d582ddc4e2384b43dd96fbce8429b21d5175d88beeeda72a0de56f8f