[INFO] updating cached repository https://github.com/mulkieran/rust-error-management
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cf95a2606348ee6f42f7032d1c8378cd8f23c6a3
[INFO] checking mulkieran/rust-error-management against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmulkieran%2Frust-error-management" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mulkieran/rust-error-management on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/mulkieran/rust-error-management
[INFO] finished tweaking git repo https://github.com/mulkieran/rust-error-management
[INFO] tweaked toml for git repo https://github.com/mulkieran/rust-error-management written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/mulkieran/rust-error-management already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f63b98446f84c4cd1fc61331f7cd2e500ad9417ba62297a97892b3c300975537
[INFO] running `"docker" "start" "-a" "f63b98446f84c4cd1fc61331f7cd2e500ad9417ba62297a97892b3c300975537"`
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]    Compiling autocfg v0.1.2
[INFO] [stderr]     Checking rustc-demangle v0.1.14
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling backtrace v0.3.15
[INFO] [stderr]     Checking rust-error-management v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:50:18
[INFO] [stderr]    |
[INFO] [stderr] 50 |     Previous(Box<std::error::Error>),
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:52:21
[INFO] [stderr]    |
[INFO] [stderr] 52 |     Constituent(Box<std::error::Error>),
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:102:56
[INFO] [stderr]     |
[INFO] [stderr] 102 |     pub fn set_constituent(&mut self, constituent: Box<std::error::Error>) {
[INFO] [stderr]     |                                                        ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:107:50
[INFO] [stderr]     |
[INFO] [stderr] 107 |     pub fn set_previous(&mut self, previous: Box<std::error::Error>) {
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:112:40
[INFO] [stderr]     |
[INFO] [stderr] 112 |     pub fn previous(&self) -> Option<&(std::error::Error + 'static)> {
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error + 'static`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:120:43
[INFO] [stderr]     |
[INFO] [stderr] 120 |     pub fn constituent(&self) -> Option<&(std::error::Error + 'static)> {
[INFO] [stderr]     |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error + 'static`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:129:34
[INFO] [stderr]     |
[INFO] [stderr] 129 |     fn source(&self) -> Option<&(std::error::Error + 'static)> {
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error + 'static`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:138:32
[INFO] [stderr]     |
[INFO] [stderr] 138 |     fn cause(&self) -> Option<&std::error::Error> {
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:50:18
[INFO] [stderr]    |
[INFO] [stderr] 50 |     Previous(Box<std::error::Error>),
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:52:21
[INFO] [stderr]    |
[INFO] [stderr] 52 |     Constituent(Box<std::error::Error>),
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:102:56
[INFO] [stderr]     |
[INFO] [stderr] 102 |     pub fn set_constituent(&mut self, constituent: Box<std::error::Error>) {
[INFO] [stderr]     |                                                        ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:107:50
[INFO] [stderr]     |
[INFO] [stderr] 107 |     pub fn set_previous(&mut self, previous: Box<std::error::Error>) {
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:112:40
[INFO] [stderr]     |
[INFO] [stderr] 112 |     pub fn previous(&self) -> Option<&(std::error::Error + 'static)> {
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error + 'static`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:120:43
[INFO] [stderr]     |
[INFO] [stderr] 120 |     pub fn constituent(&self) -> Option<&(std::error::Error + 'static)> {
[INFO] [stderr]     |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error + 'static`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:129:34
[INFO] [stderr]     |
[INFO] [stderr] 129 |     fn source(&self) -> Option<&(std::error::Error + 'static)> {
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error + 'static`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:138:32
[INFO] [stderr]     |
[INFO] [stderr] 138 |     fn cause(&self) -> Option<&std::error::Error> {
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `IoctlError`
[INFO] [stderr]   --> src/main.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     IoctlError { device_info: String },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `MetadataIoError`
[INFO] [stderr]   --> src/main.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     MetadataIoError { path: std::path::PathBuf },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_previous`
[INFO] [stderr]    --> src/main.rs:107:5
[INFO] [stderr]     |
[INFO] [stderr] 107 |     pub fn set_previous(&mut self, previous: Box<std::error::Error>) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `IoctlError`
[INFO] [stderr]   --> src/main.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     IoctlError { device_info: String },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `MetadataIoError`
[INFO] [stderr]   --> src/main.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     MetadataIoError { path: std::path::PathBuf },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_previous`
[INFO] [stderr]    --> src/main.rs:107:5
[INFO] [stderr]     |
[INFO] [stderr] 107 |     pub fn set_previous(&mut self, previous: Box<std::error::Error>) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 11 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 11 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.79s
[INFO] running `"docker" "inspect" "f63b98446f84c4cd1fc61331f7cd2e500ad9417ba62297a97892b3c300975537"`
[INFO] running `"docker" "rm" "-f" "f63b98446f84c4cd1fc61331f7cd2e500ad9417ba62297a97892b3c300975537"`
[INFO] [stdout] f63b98446f84c4cd1fc61331f7cd2e500ad9417ba62297a97892b3c300975537