[INFO] updating cached repository FreeFull/runt
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/FreeFull/runt
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/FreeFull/runt" "work/ex/beta-1.38-1/sources/1.37.0/gh/FreeFull/runt"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/FreeFull/runt'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/FreeFull/runt" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/FreeFull/runt"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/FreeFull/runt'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fd839fd93fc08ace3dd699b2755efcd6f332bbd7
[INFO] sha for GitHub repo FreeFull/runt: fd839fd93fc08ace3dd699b2755efcd6f332bbd7
[INFO] validating manifest of FreeFull/runt 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 FreeFull/runt 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 FreeFull/runt
[INFO] finished frobbing FreeFull/runt
[INFO] frobbed toml for FreeFull/runt written to work/ex/beta-1.38-1/sources/1.37.0/gh/FreeFull/runt/Cargo.toml
[INFO] started frobbing FreeFull/runt
[INFO] finished frobbing FreeFull/runt
[INFO] frobbed toml for FreeFull/runt written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/FreeFull/runt/Cargo.toml
[INFO] crate FreeFull/runt already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing FreeFull/runt 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/FreeFull/runt:/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] 75a5e2cd3e776495f94ce2fe63f86918217b884ceec354a2c5b92f3d6c15ddae
[INFO] running `"docker" "start" "-a" "75a5e2cd3e776495f94ce2fe63f86918217b884ceec354a2c5b92f3d6c15ddae"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.22
[INFO] [stderr]    Compiling nodrop v0.1.12
[INFO] [stderr]    Compiling string_cache_shared v0.3.0
[INFO] [stderr]    Compiling mac v0.1.1
[INFO] [stderr]    Compiling openssl v0.10.15
[INFO] [stderr]    Compiling procedural-masquerade v0.1.6
[INFO] [stderr]    Compiling string v0.1.1
[INFO] [stderr]    Compiling native-tls v0.2.2
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling thin-slice v0.1.1
[INFO] [stderr]    Compiling phf_shared v0.7.23
[INFO] [stderr]    Compiling crossbeam-utils v0.6.0
[INFO] [stderr]    Compiling termion v1.5.1
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling openssl-sys v0.9.39
[INFO] [stderr]    Compiling dtoa-short v0.3.2
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.1
[INFO] [stderr]    Compiling bytes v0.4.10
[INFO] [stderr]    Compiling arrayvec v0.4.7
[INFO] [stderr]    Compiling servo_arc v0.1.1
[INFO] [stderr]    Compiling mio v0.6.16
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling tokio-timer v0.2.7
[INFO] [stderr]    Compiling tokio-current-thread v0.1.3
[INFO] [stderr]    Compiling phf v0.7.23
[INFO] [stderr]    Compiling phf_generator v0.7.23
[INFO] [stderr]    Compiling futf v0.1.4
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[INFO] [stderr]    Compiling crossbeam-epoch v0.6.1
[INFO] [stderr]    Compiling tokio-io v0.1.10
[INFO] [stderr]    Compiling http v0.1.13
[INFO] [stderr]    Compiling phf_codegen v0.7.23
[INFO] [stderr]    Compiling backtrace v0.3.9
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling tendril v0.4.0
[INFO] [stderr]    Compiling selectors v0.20.0
[INFO] [stderr]    Compiling crossbeam-deque v0.6.2
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling tokio-threadpool v0.1.8
[INFO] [stderr]    Compiling parking_lot v0.6.4
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling syn v0.15.20
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling tokio-reactor v0.1.6
[INFO] [stderr]    Compiling tokio-fs v0.1.4
[INFO] [stderr]    Compiling tokio-uds v0.2.3
[INFO] [stderr]    Compiling tokio-tcp v0.1.2
[INFO] [stderr]    Compiling tokio-udp v0.1.2
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling tokio v0.1.11
[INFO] [stderr]    Compiling h2 v0.1.13
[INFO] [stderr]    Compiling hyper v0.12.14
[INFO] [stderr]    Compiling cssparser v0.24.1
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling html5ever v0.22.5
[INFO] [stderr]    Compiling cssparser-macros v0.3.5
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling hyper-tls v0.3.1
[INFO] [stderr]    Compiling failure_derive v0.1.3
[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 failure v0.1.3
[INFO] [stderr]    Compiling markup5ever v0.7.3
[INFO] [stderr]    Compiling runt v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Token`
[INFO] [stderr]  --> src/css/stylesheet/parser.rs:4:65
[INFO] [stderr]   |
[INFO] [stderr] 4 |     QualifiedRuleParser, RuleListParser, SourceLocation, ToCss, Token,
[INFO] [stderr]   |                                                                 ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Other`
[INFO] [stderr]   --> src/css/stylesheet/parser.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     Other,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Has`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     Has { attribute: String },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Equals`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     Equals { attribute: String, value: String },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `OneOf`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     OneOf { attribute: String, value: String },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Subcode`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     Subcode { attribute: String, value: String },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `After`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     After,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Backdrop`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     Backdrop,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Before`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     Before,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cue`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     Cue,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `FirstLetter`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     FirstLetter,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `FirstLine`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     FirstLine,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `GrammarError`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     GrammarError,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Marker`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     Marker,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Placeholder`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     Placeholder,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Selection`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     Selection,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `SpellingError`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     SpellingError,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `FirstChild`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |     FirstChild,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Link`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 |     Link,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Visited`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:78:5
[INFO] [stderr]    |
[INFO] [stderr] 78 |     Visited,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Focus`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     Focus,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Lang`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:82:5
[INFO] [stderr]    |
[INFO] [stderr] 82 |     Lang(String),
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get`
[INFO] [stderr]   --> src/fetcher/cache/mod.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn get(&mut self, url: &hyper::Uri) -> Option<CacheItem> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `put`
[INFO] [stderr]   --> src/fetcher/cache/mod.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn put(&mut self, url: hyper::Uri, item: CacheItem) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `clean_up`
[INFO] [stderr]   --> src/fetcher/cache/mod.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     pub fn clean_up(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/fetcher/cache/mod.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn new(data: Vec<u8>, expiration: ()) -> CacheItem {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `expired`
[INFO] [stderr]   --> src/fetcher/cache/mod.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     pub fn expired(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 58s
[INFO] running `"docker" "inspect" "75a5e2cd3e776495f94ce2fe63f86918217b884ceec354a2c5b92f3d6c15ddae"`
[INFO] running `"docker" "rm" "-f" "75a5e2cd3e776495f94ce2fe63f86918217b884ceec354a2c5b92f3d6c15ddae"`
[INFO] [stdout] 75a5e2cd3e776495f94ce2fe63f86918217b884ceec354a2c5b92f3d6c15ddae
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/FreeFull/runt:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] 310612669c5135ec0cb9ebb614cb41d568c378e612f8d2c89592d35512a0ccdd
[INFO] running `"docker" "start" "-a" "310612669c5135ec0cb9ebb614cb41d568c378e612f8d2c89592d35512a0ccdd"`
[INFO] [stderr]    Compiling runt v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Token`
[INFO] [stderr]  --> src/css/stylesheet/parser.rs:4:65
[INFO] [stderr]   |
[INFO] [stderr] 4 |     QualifiedRuleParser, RuleListParser, SourceLocation, ToCss, Token,
[INFO] [stderr]   |                                                                 ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Other`
[INFO] [stderr]   --> src/css/stylesheet/parser.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     Other,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Has`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     Has { attribute: String },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Equals`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     Equals { attribute: String, value: String },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `OneOf`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     OneOf { attribute: String, value: String },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Subcode`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     Subcode { attribute: String, value: String },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `After`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     After,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Backdrop`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     Backdrop,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Before`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     Before,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cue`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     Cue,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `FirstLetter`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     FirstLetter,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `FirstLine`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     FirstLine,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `GrammarError`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     GrammarError,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Marker`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     Marker,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Placeholder`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     Placeholder,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Selection`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     Selection,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `SpellingError`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     SpellingError,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `FirstChild`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |     FirstChild,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Link`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 |     Link,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Visited`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:78:5
[INFO] [stderr]    |
[INFO] [stderr] 78 |     Visited,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Focus`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     Focus,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Lang`
[INFO] [stderr]   --> src/css/stylesheet/mod.rs:82:5
[INFO] [stderr]    |
[INFO] [stderr] 82 |     Lang(String),
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get`
[INFO] [stderr]   --> src/fetcher/cache/mod.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn get(&mut self, url: &hyper::Uri) -> Option<CacheItem> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `put`
[INFO] [stderr]   --> src/fetcher/cache/mod.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn put(&mut self, url: hyper::Uri, item: CacheItem) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `clean_up`
[INFO] [stderr]   --> src/fetcher/cache/mod.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     pub fn clean_up(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/fetcher/cache/mod.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn new(data: Vec<u8>, expiration: ()) -> CacheItem {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `expired`
[INFO] [stderr]   --> src/fetcher/cache/mod.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     pub fn expired(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.82s
[INFO] running `"docker" "inspect" "310612669c5135ec0cb9ebb614cb41d568c378e612f8d2c89592d35512a0ccdd"`
[INFO] running `"docker" "rm" "-f" "310612669c5135ec0cb9ebb614cb41d568c378e612f8d2c89592d35512a0ccdd"`
[INFO] [stdout] 310612669c5135ec0cb9ebb614cb41d568c378e612f8d2c89592d35512a0ccdd
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/FreeFull/runt:/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" "test" "--frozen"`
[INFO] [stdout] 761dedd12e3a99d487f0859263f09c43deff57a7253bc372616312653706843a
[INFO] running `"docker" "start" "-a" "761dedd12e3a99d487f0859263f09c43deff57a7253bc372616312653706843a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.15s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/runt-3039ecf7d0ac68ef
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test css::stylesheet::tests::simple_selector ... ok
[INFO] [stdout] test css::stylesheet::tests::universal_selector ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "761dedd12e3a99d487f0859263f09c43deff57a7253bc372616312653706843a"`
[INFO] running `"docker" "rm" "-f" "761dedd12e3a99d487f0859263f09c43deff57a7253bc372616312653706843a"`
[INFO] [stdout] 761dedd12e3a99d487f0859263f09c43deff57a7253bc372616312653706843a