[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#6526e5c772f2da07db745c94ca6bb0a591a39ba4 for pr-80920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Firvingwashington%2Fobject_space_navigator" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/irvingwashington/object_space_navigator on toolchain 6526e5c772f2da07db745c94ca6bb0a591a39ba4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "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-8/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" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "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] dba40c918a6e35a4b98ede33ad5f75d340f9f2784de2e4d40fa4b497550b6a09
[INFO] running `Command { std: "docker" "start" "-a" "dba40c918a6e35a4b98ede33ad5f75d340f9f2784de2e4d40fa4b497550b6a09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dba40c918a6e35a4b98ede33ad5f75d340f9f2784de2e4d40fa4b497550b6a09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dba40c918a6e35a4b98ede33ad5f75d340f9f2784de2e4d40fa4b497550b6a09", kill_on_drop: false }`
[INFO] [stdout] dba40c918a6e35a4b98ede33ad5f75d340f9f2784de2e4d40fa4b497550b6a09
[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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d7252cfb25c15952b20301ee4dec58f6b3bd34f3b02b16285da8e2c4e8a4a811
[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" "d7252cfb25c15952b20301ee4dec58f6b3bd34f3b02b16285da8e2c4e8a4a811", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]     Checking itoa v0.4.3
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]     Checking serde_json v1.0.33
[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 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 30.80s
[INFO] running `Command { std: "docker" "inspect" "d7252cfb25c15952b20301ee4dec58f6b3bd34f3b02b16285da8e2c4e8a4a811", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7252cfb25c15952b20301ee4dec58f6b3bd34f3b02b16285da8e2c4e8a4a811", kill_on_drop: false }`
[INFO] [stdout] d7252cfb25c15952b20301ee4dec58f6b3bd34f3b02b16285da8e2c4e8a4a811