[INFO] crate unhtml_util 0.1.0 is already in cache
[INFO] extracting crate unhtml_util 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/unhtml_util/0.1.0
[INFO] extracting crate unhtml_util 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/unhtml_util/0.1.0
[INFO] validating manifest of unhtml_util-0.1.0 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of unhtml_util-0.1.0 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing unhtml_util-0.1.0
[INFO] finished frobbing unhtml_util-0.1.0
[INFO] frobbed toml for unhtml_util-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/unhtml_util/0.1.0/Cargo.toml
[INFO] started frobbing unhtml_util-0.1.0
[INFO] finished frobbing unhtml_util-0.1.0
[INFO] frobbed toml for unhtml_util-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/unhtml_util/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "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" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing unhtml_util-0.1.0 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/unhtml_util/0.1.0:/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=warn" "-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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] a7f5595f8e0b56478f904b1ddafa4420a267f4148272169d76a52617713bcad1
[INFO] running `"docker" "start" "-a" "a7f5595f8e0b56478f904b1ddafa4420a267f4148272169d76a52617713bcad1"`
[INFO] [stderr]    Compiling syn v1.0.3
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling ego-tree v0.5.1
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling selectors v0.20.0
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling cssparser v0.24.1
[INFO] [stderr]    Compiling serde_derive v1.0.99
[INFO] [stderr]    Compiling cssparser-macros v0.3.6
[INFO] [stderr]    Compiling html5ever v0.22.5
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr] warning[E0506]: cannot assign to `self.input.cached_token` because it is borrowed
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cssparser-0.24.1/src/parser.rs:572:17
[INFO] [stderr]     |
[INFO] [stderr] 547 |     pub fn next_including_whitespace_and_comments(&mut self) -> Result<&Token<'i>, BasicParseError<'i>> {
[INFO] [stderr]     |                                                   - let's call the lifetime of this reference `'1`
[INFO] [stderr] ...
[INFO] [stderr] 560 |             Some(ref cached_token)
[INFO] [stderr]     |                  ---------------- borrow of `self.input.cached_token` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 572 |                 self.input.cached_token = Some(CachedToken {
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^ assignment to borrowed `self.input.cached_token` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 584 |         Ok(token)
[INFO] [stderr]     |         --------- returning this value requires that `self.input.cached_token.0` is borrowed for `'1`
[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 markup5ever v0.7.5
[INFO] [stderr]    Compiling scraper v0.8.2
[INFO] [stderr]    Compiling unhtml_util v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(custom_attribute)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/traits.rs:11:93
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fn get_elem_by_selector_and_attr(selector_str: &'static str, attr: &'static str) -> Box<Fn(ElementRef) -> Result<Self::Elem, Error>> {
[INFO] [stderr]    |                                                                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(ElementRef) -> Result<Self::Elem, 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/traits.rs:23:79
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn get_elem_by_selector_and_inner_text(selector_str: &'static str) -> Box<Fn(ElementRef) -> Result<Self::Elem, Error>> {
[INFO] [stderr]    |                                                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(ElementRef) -> Result<Self::Elem, Error>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/traits.rs:33:73
[INFO] [stderr]    |
[INFO] [stderr] 33 |     fn get_elem_by_selector_and_html(selector_str: &'static str) -> Box<Fn(ElementRef) -> Result<Self::Elem, Error>> {
[INFO] [stderr]    |                                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(ElementRef) -> Result<Self::Elem, Error>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/traits.rs:43:52
[INFO] [stderr]    |
[INFO] [stderr] 43 |     fn get_elem_by_attr(attr: &'static str) -> Box<Fn(ElementRef) -> Result<Self::Elem, Error>> {
[INFO] [stderr]    |                                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(ElementRef) -> Result<Self::Elem, Error>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/traits.rs:63:45
[INFO] [stderr]    |
[INFO] [stderr] 63 |     fn vec_from<Fun>(getter_fn: Fun) -> Box<Fn(Select) -> Result<Vec<Self::Elem>, Error>>
[INFO] [stderr]    |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Select) -> Result<Vec<Self::Elem>, Error>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/traits.rs:75:44
[INFO] [stderr]    |
[INFO] [stderr] 75 |         where Fun: Fn(&'static str) -> Box<Fn(ElementRef) -> Result<Self::Elem, Error>> + 'static + Copy {
[INFO] [stderr]    |                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(ElementRef) -> Result<Self::Elem, Error>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/traits.rs:74:79
[INFO] [stderr]    |
[INFO] [stderr] 74 |     fn vec_from_single_attr<Fun>(string: &'static str, getter_fn: Fun) -> Box<Fn(Select) -> Result<Vec<Self::Elem>, Error>>
[INFO] [stderr]    |                                                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Select) -> Result<Vec<Self::Elem>, Error>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/traits.rs:86:58
[INFO] [stderr]    |
[INFO] [stderr] 86 |         where Fun: Fn(&'static str, &'static str) -> Box<Fn(ElementRef) -> Result<Self::Elem, Error>> + 'static + Copy {
[INFO] [stderr]    |                                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(ElementRef) -> Result<Self::Elem, Error>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/traits.rs:85:109
[INFO] [stderr]    |
[INFO] [stderr] 85 |     fn vec_from_double_attr<Fun>(str_former: &'static str, str_latter: &'static str, getter_fn: Fun) -> Box<Fn(Select) -> Result<Vec<Self::Elem>, Error>>
[INFO] [stderr]    |                                                                                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Select) -> Result<Vec<Self::Elem>, Error>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/traits.rs:96:88
[INFO] [stderr]    |
[INFO] [stderr] 96 |     fn vec_by_selector_and_attr(selector_str: &'static str, attr: &'static str) -> Box<Fn(Select) -> Result<Vec<Self::Elem>, Error>> {
[INFO] [stderr]    |                                                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Select) -> Result<Vec<Self::Elem>, Error>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/traits.rs:100:68
[INFO] [stderr]     |
[INFO] [stderr] 100 |     fn vec_by_selector_and_html(selector_str: &'static str) -> Box<Fn(Select) -> Result<Vec<Self::Elem>, Error>> {
[INFO] [stderr]     |                                                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Select) -> Result<Vec<Self::Elem>, Error>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/traits.rs:104:74
[INFO] [stderr]     |
[INFO] [stderr] 104 |     fn vec_by_selector_and_inner_text(selector_str: &'static str) -> Box<Fn(Select) -> Result<Vec<Self::Elem>, Error>> {
[INFO] [stderr]     |                                                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Select) -> Result<Vec<Self::Elem>, Error>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/traits.rs:108:47
[INFO] [stderr]     |
[INFO] [stderr] 108 |     fn vec_by_attr(attr: &'static str) -> Box<Fn(Select) -> Result<Vec<Self::Elem>, Error>> {
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Select) -> Result<Vec<Self::Elem>, Error>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `unhtml_util`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a7f5595f8e0b56478f904b1ddafa4420a267f4148272169d76a52617713bcad1"`
[INFO] running `"docker" "rm" "-f" "a7f5595f8e0b56478f904b1ddafa4420a267f4148272169d76a52617713bcad1"`
[INFO] [stdout] a7f5595f8e0b56478f904b1ddafa4420a267f4148272169d76a52617713bcad1