[INFO] cloning repository https://github.com/irvingwashington/object_space_navigator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/irvingwashington/object_space_navigator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Firvingwashington%2Fobject_space_navigator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Firvingwashington%2Fobject_space_navigator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d549c75537f09b50a6a85571daf7b04dabc114dd
[INFO] checking irvingwashington/object_space_navigator against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Firvingwashington%2Fobject_space_navigator" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/irvingwashington/object_space_navigator on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/irvingwashington/object_space_navigator
[INFO] finished tweaking git repo https://github.com/irvingwashington/object_space_navigator
[INFO] tweaked toml for git repo https://github.com/irvingwashington/object_space_navigator written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/irvingwashington/object_space_navigator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 730ddc98ba3040ce8c66e06982b4243f7564d1f1531ab975fc2f8963c9c9d37a
[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" "730ddc98ba3040ce8c66e06982b4243f7564d1f1531ab975fc2f8963c9c9d37a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "730ddc98ba3040ce8c66e06982b4243f7564d1f1531ab975fc2f8963c9c9d37a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "730ddc98ba3040ce8c66e06982b4243f7564d1f1531ab975fc2f8963c9c9d37a", kill_on_drop: false }`
[INFO] [stdout] 730ddc98ba3040ce8c66e06982b4243f7564d1f1531ab975fc2f8963c9c9d37a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "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] ee58d93c4a1bc212f138940a530ad297f0080728ee839893f44188ef765bdf80
[INFO] running `Command { std: "docker" "start" "-a" "ee58d93c4a1bc212f138940a530ad297f0080728ee839893f44188ef765bdf80", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]    Compiling serde v1.0.82
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling syn v0.15.23
[INFO] [stderr]    Compiling serde_derive v1.0.82
[INFO] [stderr]     Checking serde_json v1.0.33
[INFO] [stderr]     Checking object_space_navigator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `RootObject`
[INFO] [stdout]   --> src/heap_dump.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     RootObject(RootObject)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_value`
[INFO] [stdout]   --> src/heap_dump.rs:90:8
[INFO] [stdout]    |
[INFO] [stdout] 90 |     fn from_value(value: Value) -> Self {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/object_space_2_6_0/node_root.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/object_space_2_6_0/node_array.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/object_space_2_6_0/node_string.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/object_space_2_6_0/node_imemo.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/object_space_2_6_0/node_object.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/object_space_2_6_0/node_regexp.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/object_space_2_6_0/node_class.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/object_space_2_6_0/node_module.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/object_space_2_6_0/node_hash.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/object_space_2_6_0/node_data.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/object_space_2_6_0/node_iclass.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/object_space_2_6_0/node_symbol.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/object_space_2_6_0/node_complex.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/object_space_2_6_0/node_bignum.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/object_space_2_6_0/node_file.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/object_space_2_6_0/node_float.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/object_space_2_6_0/node_rational.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/object_space_2_6_0/node_struct.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/object_space_2_6_0/node_match.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 21 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RootObject`
[INFO] [stdout]   --> src/heap_dump.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     RootObject(RootObject)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_value`
[INFO] [stdout]   --> src/heap_dump.rs:90:8
[INFO] [stdout]    |
[INFO] [stdout] 90 |     fn from_value(value: Value) -> Self {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.50s
[INFO] running `Command { std: "docker" "inspect" "ee58d93c4a1bc212f138940a530ad297f0080728ee839893f44188ef765bdf80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee58d93c4a1bc212f138940a530ad297f0080728ee839893f44188ef765bdf80", kill_on_drop: false }`
[INFO] [stdout] ee58d93c4a1bc212f138940a530ad297f0080728ee839893f44188ef765bdf80