Dec 18 08:41:08.029 INFO checking AlanFoster/toy_layout_engine against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 08:41:08.029 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-1/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/AlanFoster/toy_layout_engine:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 08:41:08.588 INFO [stdout] 5d5c40fe6c772aa8f6e249346cfc196c1213c92163e094c399e74f05b3e16043
Dec 18 08:41:08.595 INFO running `"docker" "start" "-a" "5d5c40fe6c772aa8f6e249346cfc196c1213c92163e094c399e74f05b3e16043"`
Dec 18 08:41:10.024 INFO [stderr]     Checking toy_layout_engine v0.1.0 (/opt/crater/workdir)
Dec 18 08:41:11.060 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:41:11.060 INFO [stderr]   --> src/dom.rs:17:13
Dec 18 08:41:11.060 INFO [stderr]    |
Dec 18 08:41:11.060 INFO [stderr] 17 |             write!(formatter, "{}", c);
Dec 18 08:41:11.060 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.060 INFO [stderr]    |
Dec 18 08:41:11.060 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 08:41:11.060 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:41:11.060 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 08:41:11.060 INFO [stderr] 
Dec 18 08:41:11.084 INFO [stderr] warning: method is never used: `specificity`
Dec 18 08:41:11.084 INFO [stderr]   --> src/css.rs:22:5
Dec 18 08:41:11.084 INFO [stderr]    |
Dec 18 08:41:11.084 INFO [stderr] 22 |     pub fn specificity(&self) -> Specificity {
Dec 18 08:41:11.084 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.084 INFO [stderr]    |
Dec 18 08:41:11.084 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 08:41:11.084 INFO [stderr] 
Dec 18 08:41:11.084 INFO [stderr] warning: variant is never constructed: `Simple`
Dec 18 08:41:11.084 INFO [stderr]   --> src/css.rs:34:5
Dec 18 08:41:11.084 INFO [stderr]    |
Dec 18 08:41:11.084 INFO [stderr] 34 |     Simple(SimpleSelector),
Dec 18 08:41:11.084 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.084 INFO [stderr] 
Dec 18 08:41:11.084 INFO [stderr] warning: variant is never constructed: `Keyword`
Dec 18 08:41:11.084 INFO [stderr]   --> src/css.rs:52:5
Dec 18 08:41:11.084 INFO [stderr]    |
Dec 18 08:41:11.084 INFO [stderr] 52 |     Keyword(String),
Dec 18 08:41:11.084 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 18 08:41:11.084 INFO [stderr] 
Dec 18 08:41:11.084 INFO [stderr] warning: variant is never constructed: `Length`
Dec 18 08:41:11.084 INFO [stderr]   --> src/css.rs:53:5
Dec 18 08:41:11.084 INFO [stderr]    |
Dec 18 08:41:11.084 INFO [stderr] 53 |     Length(f32, Unit),
Dec 18 08:41:11.084 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.084 INFO [stderr] 
Dec 18 08:41:11.084 INFO [stderr] warning: variant is never constructed: `ColorValue`
Dec 18 08:41:11.084 INFO [stderr]   --> src/css.rs:54:5
Dec 18 08:41:11.084 INFO [stderr]    |
Dec 18 08:41:11.084 INFO [stderr] 54 |     ColorValue(Color),
Dec 18 08:41:11.084 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.084 INFO [stderr] 
Dec 18 08:41:11.084 INFO [stderr] warning: variant is never constructed: `Px`
Dec 18 08:41:11.085 INFO [stderr]   --> src/css.rs:59:5
Dec 18 08:41:11.085 INFO [stderr]    |
Dec 18 08:41:11.085 INFO [stderr] 59 |     Px,
Dec 18 08:41:11.085 INFO [stderr]    |     ^^
Dec 18 08:41:11.085 INFO [stderr] 
Dec 18 08:41:11.085 INFO [stderr] warning: function is never used: `parse_css`
Dec 18 08:41:11.085 INFO [stderr]   --> src/css.rs:70:1
Dec 18 08:41:11.085 INFO [stderr]    |
Dec 18 08:41:11.085 INFO [stderr] 70 | fn parse_css(input: String) -> Stylesheet {
Dec 18 08:41:11.085 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.085 INFO [stderr] 
Dec 18 08:41:11.085 INFO [stderr] warning: struct is never constructed: `Parser`
Dec 18 08:41:11.085 INFO [stderr]   --> src/css.rs:78:1
Dec 18 08:41:11.085 INFO [stderr]    |
Dec 18 08:41:11.085 INFO [stderr] 78 | struct Parser {
Dec 18 08:41:11.085 INFO [stderr]    | ^^^^^^^^^^^^^
Dec 18 08:41:11.085 INFO [stderr] 
Dec 18 08:41:11.085 INFO [stderr] warning: function is never used: `is_valid_identifier_char`
Dec 18 08:41:11.085 INFO [stderr]   --> src/css.rs:83:1
Dec 18 08:41:11.085 INFO [stderr]    |
Dec 18 08:41:11.085 INFO [stderr] 83 | fn is_valid_identifier_char(c: char) -> bool {
Dec 18 08:41:11.085 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.085 INFO [stderr] 
Dec 18 08:41:11.085 INFO [stderr] warning: method is never used: `parse_rules`
Dec 18 08:41:11.085 INFO [stderr]   --> src/css.rs:91:5
Dec 18 08:41:11.085 INFO [stderr]    |
Dec 18 08:41:11.085 INFO [stderr] 91 |     fn parse_rules(&mut self) -> Vec<Rule> {
Dec 18 08:41:11.085 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.085 INFO [stderr] 
Dec 18 08:41:11.085 INFO [stderr] warning: method is never used: `parse_rule`
Dec 18 08:41:11.085 INFO [stderr]    --> src/css.rs:105:5
Dec 18 08:41:11.085 INFO [stderr]     |
Dec 18 08:41:11.085 INFO [stderr] 105 |     fn parse_rule(&mut self) -> Rule {
Dec 18 08:41:11.085 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.085 INFO [stderr] 
Dec 18 08:41:11.085 INFO [stderr] warning: method is never used: `parse_selectors`
Dec 18 08:41:11.085 INFO [stderr]    --> src/css.rs:112:5
Dec 18 08:41:11.085 INFO [stderr]     |
Dec 18 08:41:11.085 INFO [stderr] 112 |     fn parse_selectors(&mut self) -> Vec<Selector> {
Dec 18 08:41:11.085 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.085 INFO [stderr] 
Dec 18 08:41:11.085 INFO [stderr] warning: method is never used: `parse_declarations`
Dec 18 08:41:11.085 INFO [stderr]    --> src/css.rs:130:5
Dec 18 08:41:11.085 INFO [stderr]     |
Dec 18 08:41:11.085 INFO [stderr] 130 |     fn parse_declarations(&mut self) -> Vec<Declaration> {
Dec 18 08:41:11.085 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.085 INFO [stderr] 
Dec 18 08:41:11.085 INFO [stderr] warning: method is never used: `parse_simple_selector`
Dec 18 08:41:11.085 INFO [stderr]    --> src/css.rs:147:5
Dec 18 08:41:11.085 INFO [stderr]     |
Dec 18 08:41:11.085 INFO [stderr] 147 |     fn parse_simple_selector(&mut self) -> Selector {
Dec 18 08:41:11.085 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.085 INFO [stderr] 
Dec 18 08:41:11.085 INFO [stderr] warning: method is never used: `parse_declaration`
Dec 18 08:41:11.085 INFO [stderr]    --> src/css.rs:182:5
Dec 18 08:41:11.085 INFO [stderr]     |
Dec 18 08:41:11.085 INFO [stderr] 182 |     fn parse_declaration(&mut self) -> Declaration {
Dec 18 08:41:11.085 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.085 INFO [stderr] 
Dec 18 08:41:11.085 INFO [stderr] warning: method is never used: `parse_value`
Dec 18 08:41:11.085 INFO [stderr]    --> src/css.rs:196:5
Dec 18 08:41:11.085 INFO [stderr]     |
Dec 18 08:41:11.085 INFO [stderr] 196 |     fn parse_value(&mut self) -> Value {
Dec 18 08:41:11.085 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.085 INFO [stderr] 
Dec 18 08:41:11.085 INFO [stderr] warning: method is never used: `parse_color`
Dec 18 08:41:11.085 INFO [stderr]    --> src/css.rs:204:5
Dec 18 08:41:11.085 INFO [stderr]     |
Dec 18 08:41:11.085 INFO [stderr] 204 |     fn parse_color(&mut self) -> Value {
Dec 18 08:41:11.085 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.085 INFO [stderr] 
Dec 18 08:41:11.085 INFO [stderr] warning: method is never used: `parse_hex_pair`
Dec 18 08:41:11.085 INFO [stderr]    --> src/css.rs:216:5
Dec 18 08:41:11.085 INFO [stderr]     |
Dec 18 08:41:11.085 INFO [stderr] 216 |     fn parse_hex_pair(&mut self) -> u8 {
Dec 18 08:41:11.085 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.085 INFO [stderr] 
Dec 18 08:41:11.085 INFO [stderr] warning: method is never used: `parse_length`
Dec 18 08:41:11.085 INFO [stderr]    --> src/css.rs:222:5
Dec 18 08:41:11.085 INFO [stderr]     |
Dec 18 08:41:11.085 INFO [stderr] 222 |     fn parse_length(&mut self) -> Value {
Dec 18 08:41:11.085 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.085 INFO [stderr] 
Dec 18 08:41:11.085 INFO [stderr] warning: method is never used: `parse_float`
Dec 18 08:41:11.085 INFO [stderr]    --> src/css.rs:229:5
Dec 18 08:41:11.085 INFO [stderr]     |
Dec 18 08:41:11.085 INFO [stderr] 229 |     fn parse_float(&mut self) -> f32 {
Dec 18 08:41:11.085 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.085 INFO [stderr] 
Dec 18 08:41:11.085 INFO [stderr] warning: method is never used: `parse_unit`
Dec 18 08:41:11.085 INFO [stderr]    --> src/css.rs:238:5
Dec 18 08:41:11.086 INFO [stderr]     |
Dec 18 08:41:11.086 INFO [stderr] 238 |     fn parse_unit(&mut self) -> Unit {
Dec 18 08:41:11.086 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.086 INFO [stderr] 
Dec 18 08:41:11.086 INFO [stderr] warning: method is never used: `parse_keyword`
Dec 18 08:41:11.086 INFO [stderr]    --> src/css.rs:245:5
Dec 18 08:41:11.086 INFO [stderr]     |
Dec 18 08:41:11.086 INFO [stderr] 245 |     fn parse_keyword(&mut self) -> Value {
Dec 18 08:41:11.086 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.086 INFO [stderr] 
Dec 18 08:41:11.086 INFO [stderr] warning: method is never used: `parse_declaration_name`
Dec 18 08:41:11.086 INFO [stderr]    --> src/css.rs:254:5
Dec 18 08:41:11.086 INFO [stderr]     |
Dec 18 08:41:11.086 INFO [stderr] 254 |     fn parse_declaration_name(&mut self) -> String {
Dec 18 08:41:11.086 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.086 INFO [stderr] 
Dec 18 08:41:11.086 INFO [stderr] warning: method is never used: `parse_identifier`
Dec 18 08:41:11.086 INFO [stderr]    --> src/css.rs:261:5
Dec 18 08:41:11.086 INFO [stderr]     |
Dec 18 08:41:11.086 INFO [stderr] 261 |     fn parse_identifier(&mut self) -> String {
Dec 18 08:41:11.086 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.086 INFO [stderr] 
Dec 18 08:41:11.086 INFO [stderr] warning: method is never used: `next_char`
Dec 18 08:41:11.086 INFO [stderr]    --> src/css.rs:265:5
Dec 18 08:41:11.086 INFO [stderr]     |
Dec 18 08:41:11.086 INFO [stderr] 265 |     fn next_char(&mut self) -> char {
Dec 18 08:41:11.086 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.086 INFO [stderr] 
Dec 18 08:41:11.086 INFO [stderr] warning: method is never used: `eof`
Dec 18 08:41:11.086 INFO [stderr]    --> src/css.rs:269:5
Dec 18 08:41:11.086 INFO [stderr]     |
Dec 18 08:41:11.086 INFO [stderr] 269 |     fn eof(&mut self) -> bool {
Dec 18 08:41:11.086 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.086 INFO [stderr] 
Dec 18 08:41:11.086 INFO [stderr] warning: method is never used: `consume_char`
Dec 18 08:41:11.086 INFO [stderr]    --> src/css.rs:273:5
Dec 18 08:41:11.086 INFO [stderr]     |
Dec 18 08:41:11.086 INFO [stderr] 273 |     fn consume_char(&mut self) -> char {
Dec 18 08:41:11.086 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.086 INFO [stderr] 
Dec 18 08:41:11.086 INFO [stderr] warning: method is never used: `consume_while`
Dec 18 08:41:11.086 INFO [stderr]    --> src/css.rs:282:5
Dec 18 08:41:11.086 INFO [stderr]     |
Dec 18 08:41:11.086 INFO [stderr] 282 | /     fn consume_while<F>(&mut self, f: F) -> String
Dec 18 08:41:11.086 INFO [stderr] 283 | |         where F: Fn(char) -> bool {
Dec 18 08:41:11.086 INFO [stderr] 284 | |         let mut result = String::new();
Dec 18 08:41:11.086 INFO [stderr] 285 | |         while !self.eof() && f(self.next_char()) {
Dec 18 08:41:11.086 INFO [stderr] ...   |
Dec 18 08:41:11.086 INFO [stderr] 289 | |         result
Dec 18 08:41:11.086 INFO [stderr] 290 | |     }
Dec 18 08:41:11.086 INFO [stderr]     | |_____^
Dec 18 08:41:11.086 INFO [stderr] 
Dec 18 08:41:11.086 INFO [stderr] warning: method is never used: `consume_whitespace`
Dec 18 08:41:11.086 INFO [stderr]    --> src/css.rs:292:5
Dec 18 08:41:11.086 INFO [stderr]     |
Dec 18 08:41:11.086 INFO [stderr] 292 |     fn consume_whitespace(&mut self) -> String {
Dec 18 08:41:11.086 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.086 INFO [stderr] 
Dec 18 08:41:11.086 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:41:11.086 INFO [stderr]   --> src/dom.rs:17:13
Dec 18 08:41:11.086 INFO [stderr]    |
Dec 18 08:41:11.086 INFO [stderr] 17 |             write!(formatter, "{}", c);
Dec 18 08:41:11.086 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:41:11.086 INFO [stderr]    |
Dec 18 08:41:11.086 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 08:41:11.086 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:41:11.086 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 08:41:11.086 INFO [stderr] 
Dec 18 08:41:11.152 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.15s
Dec 18 08:41:11.878 INFO running `"docker" "inspect" "5d5c40fe6c772aa8f6e249346cfc196c1213c92163e094c399e74f05b3e16043"`
Dec 18 08:41:12.318 INFO running `"docker" "rm" "-f" "5d5c40fe6c772aa8f6e249346cfc196c1213c92163e094c399e74f05b3e16043"`
Dec 18 08:41:12.624 INFO [stdout] 5d5c40fe6c772aa8f6e249346cfc196c1213c92163e094c399e74f05b3e16043