[INFO] updating cached repository msekletar/net-ifnames-prefix
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/msekletar/net-ifnames-prefix
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/msekletar/net-ifnames-prefix" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/msekletar/net-ifnames-prefix"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/msekletar/net-ifnames-prefix'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/msekletar/net-ifnames-prefix" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/msekletar/net-ifnames-prefix"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/msekletar/net-ifnames-prefix'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 57f075d9df0cd4ea1b39003044e6e36c7f6dfbfe
[INFO] sha for GitHub repo msekletar/net-ifnames-prefix: 57f075d9df0cd4ea1b39003044e6e36c7f6dfbfe
[INFO] validating manifest of msekletar/net-ifnames-prefix 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 msekletar/net-ifnames-prefix 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 msekletar/net-ifnames-prefix
[INFO] finished frobbing msekletar/net-ifnames-prefix
[INFO] frobbed toml for msekletar/net-ifnames-prefix written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/msekletar/net-ifnames-prefix/Cargo.toml
[INFO] started frobbing msekletar/net-ifnames-prefix
[INFO] finished frobbing msekletar/net-ifnames-prefix
[INFO] frobbed toml for msekletar/net-ifnames-prefix written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/msekletar/net-ifnames-prefix/Cargo.toml
[INFO] crate msekletar/net-ifnames-prefix 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking msekletar/net-ifnames-prefix 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/msekletar/net-ifnames-prefix:/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] 635a6029fcc310936a4a59e161906b6d7117cba3e5c658542805799e04f08391
[INFO] running `"docker" "start" "-a" "635a6029fcc310936a4a59e161906b6d7117cba3e5c658542805799e04f08391"`
[INFO] [stderr]    Compiling adler32 v1.0.2
[INFO] [stderr]    Compiling openssl-sys v0.9.32
[INFO] [stderr]    Compiling log v0.4.3
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]    Compiling url v1.7.0
[INFO] [stderr]    Compiling serde_json v1.0.19
[INFO] [stderr]    Compiling libflate v0.1.14
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling mime v0.2.6
[INFO] [stderr] warning[E0713]: borrow may still be in use when destructor runs
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/url-1.7.0/src/form_urlencoded.rs:261:40
[INFO] [stderr]     |
[INFO] [stderr] 259 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stderr]     |      -- lifetime `'a` defined here
[INFO] [stderr] 260 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stderr] 261 |     fn finish(self) -> &'a mut ::Url { self.url }
[INFO] [stderr]     |                                        ^^^^^^^^ - here, drop of `self` needs exclusive access to `*self.url`, because the type `UrlQuery<'_>` implements the `Drop` trait
[INFO] [stderr]     |                                        |
[INFO] [stderr]     |                                        returning this value requires that `*self.url` is borrowed for `'a`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]    Compiling serde_urlencoded v0.5.2
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]    Compiling hyper v0.10.13
[INFO] [stderr]    Compiling native-tls v0.1.5
[INFO] [stderr]    Compiling hyper-native-tls v0.2.4
[INFO] [stderr]    Compiling reqwest v0.6.2
[INFO] [stderr]    Compiling hwaddr v0.1.4
[INFO] [stderr]     Checking net-ifnames-prefix v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/config.rs:27:70
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn new<T: ToString>(link_name: &T) -> Result<LinkConfig, Box<Error>> {
[INFO] [stderr]    |                                                                      ^^^^^ help: use `dyn`: `dyn 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/config.rs:36:99
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn new_with_hwaddr<T: ToString>(link_name: &T, hwaddr: &HwAddr) -> Result<LinkConfig, Box<Error>> {
[INFO] [stderr]    |                                                                                                   ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/config.rs:45:61
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn hwaddr_from_event_device() -> Result<HwAddr, Box<Error>> {
[INFO] [stderr]    |                                                             ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/config.rs:66:53
[INFO] [stderr]    |
[INFO] [stderr] 66 |     pub fn write_link_file(&self) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                     ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/config.rs:105:46
[INFO] [stderr]     |
[INFO] [stderr] 105 |     pub fn load(&mut self) -> Result<(), Box<Error>> {
[INFO] [stderr]     |                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/config.rs:124:56
[INFO] [stderr]     |
[INFO] [stderr] 124 |     pub fn next_link_name(&self) -> Result<String, Box<Error>> {
[INFO] [stderr]     |                                                        ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/config.rs:135:89
[INFO] [stderr]     |
[INFO] [stderr] 135 |     fn match_ethernet_links(udev_enumerate: &mut libudev::Enumerator) -> Result<(), Box<Error>> {
[INFO] [stderr]     |                                                                                         ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/config.rs:142:63
[INFO] [stderr]     |
[INFO] [stderr] 142 |     fn enumerate_links_from_udev(&mut self) -> Result<(), Box<Error>> {
[INFO] [stderr]     |                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/config.rs:164:64
[INFO] [stderr]     |
[INFO] [stderr] 164 |     fn enumerate_links_from_files(&mut self) -> Result<(), Box<Error>> {
[INFO] [stderr]     |                                                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/sema.rs:13:63
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub fn new_with_name(name: &str) -> Result<Semaphore, Box<Error>> {
[INFO] [stderr]    |                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:23:59
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn get_prefix_from_file(path: &str) -> Result<String, Box<Error>> {
[INFO] [stderr]    |                                                           ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/config.rs:27:70
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn new<T: ToString>(link_name: &T) -> Result<LinkConfig, Box<Error>> {
[INFO] [stderr]    |                                                                      ^^^^^ help: use `dyn`: `dyn 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/config.rs:36:99
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn new_with_hwaddr<T: ToString>(link_name: &T, hwaddr: &HwAddr) -> Result<LinkConfig, Box<Error>> {
[INFO] [stderr]    |                                                                                                   ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/config.rs:45:61
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn hwaddr_from_event_device() -> Result<HwAddr, Box<Error>> {
[INFO] [stderr]    |                                                             ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/config.rs:66:53
[INFO] [stderr]    |
[INFO] [stderr] 66 |     pub fn write_link_file(&self) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                     ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/config.rs:105:46
[INFO] [stderr]     |
[INFO] [stderr] 105 |     pub fn load(&mut self) -> Result<(), Box<Error>> {
[INFO] [stderr]     |                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/config.rs:124:56
[INFO] [stderr]     |
[INFO] [stderr] 124 |     pub fn next_link_name(&self) -> Result<String, Box<Error>> {
[INFO] [stderr]     |                                                        ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/config.rs:135:89
[INFO] [stderr]     |
[INFO] [stderr] 135 |     fn match_ethernet_links(udev_enumerate: &mut libudev::Enumerator) -> Result<(), Box<Error>> {
[INFO] [stderr]     |                                                                                         ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/config.rs:142:63
[INFO] [stderr]     |
[INFO] [stderr] 142 |     fn enumerate_links_from_udev(&mut self) -> Result<(), Box<Error>> {
[INFO] [stderr]     |                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/config.rs:164:64
[INFO] [stderr]     |
[INFO] [stderr] 164 |     fn enumerate_links_from_files(&mut self) -> Result<(), Box<Error>> {
[INFO] [stderr]     |                                                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/sema.rs:13:63
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub fn new_with_name(name: &str) -> Result<Semaphore, Box<Error>> {
[INFO] [stderr]    |                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:23:59
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn get_prefix_from_file(path: &str) -> Result<String, Box<Error>> {
[INFO] [stderr]    |                                                           ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]    --> src/config.rs:130:36
[INFO] [stderr]     |
[INFO] [stderr] 130 |         let last_index = last.name.trim_left_matches(&self.ifname_prefix).parse::<u64>()?;
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated item: `trim_start_matches`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]    --> src/config.rs:130:36
[INFO] [stderr]     |
[INFO] [stderr] 130 |         let last_index = last.name.trim_left_matches(&self.ifname_prefix).parse::<u64>()?;
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated item: `trim_start_matches`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 45.54s
[INFO] running `"docker" "inspect" "635a6029fcc310936a4a59e161906b6d7117cba3e5c658542805799e04f08391"`
[INFO] running `"docker" "rm" "-f" "635a6029fcc310936a4a59e161906b6d7117cba3e5c658542805799e04f08391"`
[INFO] [stdout] 635a6029fcc310936a4a59e161906b6d7117cba3e5c658542805799e04f08391