[INFO] fetching crate id_tree 1.7.0...
[INFO] checking id_tree-1.7.0 against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] extracting crate id_tree 1.7.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate id_tree 1.7.0 on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "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-8/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" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded snowflake v1.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "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] a138871419a0b9b2fdc6b138c7ae0422efed728948416c9a2d237a847193f229
[INFO] running `Command { std: "docker" "start" "-a" "a138871419a0b9b2fdc6b138c7ae0422efed728948416c9a2d237a847193f229", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a138871419a0b9b2fdc6b138c7ae0422efed728948416c9a2d237a847193f229", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a138871419a0b9b2fdc6b138c7ae0422efed728948416c9a2d237a847193f229", kill_on_drop: false }`
[INFO] [stdout] a138871419a0b9b2fdc6b138c7ae0422efed728948416c9a2d237a847193f229
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "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] 7d56de869c55c72a3ef6c6129835bc6fdc2a8df23ce7a3214d7d5afd22288e42
[INFO] running `Command { std: "docker" "start" "-a" "7d56de869c55c72a3ef6c6129835bc6fdc2a8df23ce7a3214d7d5afd22288e42", 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 2.59s
[INFO] running `Command { std: "docker" "inspect" "7d56de869c55c72a3ef6c6129835bc6fdc2a8df23ce7a3214d7d5afd22288e42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d56de869c55c72a3ef6c6129835bc6fdc2a8df23ce7a3214d7d5afd22288e42", kill_on_drop: false }`
[INFO] [stdout] 7d56de869c55c72a3ef6c6129835bc6fdc2a8df23ce7a3214d7d5afd22288e42