[INFO] updating cached repository irvingwashington/object_space_navigator
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/irvingwashington/object_space_navigator
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/irvingwashington/object_space_navigator" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/irvingwashington/object_space_navigator"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/irvingwashington/object_space_navigator'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/irvingwashington/object_space_navigator" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/irvingwashington/object_space_navigator"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/irvingwashington/object_space_navigator'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d549c75537f09b50a6a85571daf7b04dabc114dd
[INFO] sha for GitHub repo irvingwashington/object_space_navigator: d549c75537f09b50a6a85571daf7b04dabc114dd
[INFO] validating manifest of irvingwashington/object_space_navigator on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of irvingwashington/object_space_navigator on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing irvingwashington/object_space_navigator
[INFO] finished frobbing irvingwashington/object_space_navigator
[INFO] frobbed toml for irvingwashington/object_space_navigator written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/irvingwashington/object_space_navigator/Cargo.toml
[INFO] started frobbing irvingwashington/object_space_navigator
[INFO] finished frobbing irvingwashington/object_space_navigator
[INFO] frobbed toml for irvingwashington/object_space_navigator written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/irvingwashington/object_space_navigator/Cargo.toml
[INFO] crate irvingwashington/object_space_navigator already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking irvingwashington/object_space_navigator against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-4/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/irvingwashington/object_space_navigator:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] abfd0d1f93d36faf875de8f1f5663923051244f738d86075f7111585e3c44490
[INFO] running `"docker" "start" "-a" "abfd0d1f93d36faf875de8f1f5663923051244f738d86075f7111585e3c44490"`
[INFO] [stderr]     Checking object_space_navigator v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variant is never constructed: `RootObject`
[INFO] [stderr]   --> src/heap_dump.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     RootObject(RootObject)
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_value`
[INFO] [stderr]   --> src/heap_dump.rs:90:5
[INFO] [stderr]    |
[INFO] [stderr] 90 |     fn from_value(value: Value) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/object_space_2_6_0/node_root.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/object_space_2_6_0/node_array.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/object_space_2_6_0/node_string.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/object_space_2_6_0/node_imemo.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/object_space_2_6_0/node_object.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/object_space_2_6_0/node_regexp.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/object_space_2_6_0/node_class.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/object_space_2_6_0/node_module.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/object_space_2_6_0/node_hash.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/object_space_2_6_0/node_data.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/object_space_2_6_0/node_iclass.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/object_space_2_6_0/node_symbol.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/object_space_2_6_0/node_complex.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/object_space_2_6_0/node_bignum.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/object_space_2_6_0/node_file.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/object_space_2_6_0/node_float.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/object_space_2_6_0/node_rational.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/object_space_2_6_0/node_struct.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/object_space_2_6_0/node_match.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn from_str(json_form: &str) -> Result<Self, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RootObject`
[INFO] [stderr]   --> src/heap_dump.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     RootObject(RootObject)
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_value`
[INFO] [stderr]   --> src/heap_dump.rs:90:5
[INFO] [stderr]    |
[INFO] [stderr] 90 |     fn from_value(value: Value) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.44s
[INFO] running `"docker" "inspect" "abfd0d1f93d36faf875de8f1f5663923051244f738d86075f7111585e3c44490"`
[INFO] running `"docker" "rm" "-f" "abfd0d1f93d36faf875de8f1f5663923051244f738d86075f7111585e3c44490"`
[INFO] [stdout] abfd0d1f93d36faf875de8f1f5663923051244f738d86075f7111585e3c44490