[INFO] cloning repository https://github.com/maheshbansod/ser-brow-engine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/maheshbansod/ser-brow-engine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaheshbansod%2Fser-brow-engine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaheshbansod%2Fser-brow-engine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7e471857e58b799550537e6e09fd5e7c18b1260a
[INFO] building maheshbansod/ser-brow-engine/7e471857e58b799550537e6e09fd5e7c18b1260a against master#eb171a227f9e5de5d376b6edb56b174bc8235fb3 for pr-149937
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaheshbansod%2Fser-brow-engine" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/maheshbansod/ser-brow-engine
[INFO] finished tweaking git repo https://github.com/maheshbansod/ser-brow-engine
[INFO] tweaked toml for git repo https://github.com/maheshbansod/ser-brow-engine written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/maheshbansod/ser-brow-engine on toolchain eb171a227f9e5de5d376b6edb56b174bc8235fb3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+eb171a227f9e5de5d376b6edb56b174bc8235fb3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/maheshbansod/ser-brow-engine already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+eb171a227f9e5de5d376b6edb56b174bc8235fb3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+eb171a227f9e5de5d376b6edb56b174bc8235fb3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a24f9647f329332710d86666f5617b2f02cc65bae21d1276a527615070a6f55d
[INFO] running `Command { std: "docker" "start" "-a" "a24f9647f329332710d86666f5617b2f02cc65bae21d1276a527615070a6f55d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a24f9647f329332710d86666f5617b2f02cc65bae21d1276a527615070a6f55d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a24f9647f329332710d86666f5617b2f02cc65bae21d1276a527615070a6f55d", kill_on_drop: false }`
[INFO] [stdout] a24f9647f329332710d86666f5617b2f02cc65bae21d1276a527615070a6f55d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+eb171a227f9e5de5d376b6edb56b174bc8235fb3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5c409dbac787b14de7b2a6850815b6ea7e7a5fd6e400dc2322cd2a3c2df2806a
[INFO] running `Command { std: "docker" "start" "-a" "5c409dbac787b14de7b2a6850815b6ea7e7a5fd6e400dc2322cd2a3c2df2806a", kill_on_drop: false }`
[INFO] [stderr]    Compiling light-browser-engine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `id` and `classes` are never used
[INFO] [stdout]   --> src/dom.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl ElementData {
[INFO] [stdout]    | ---------------- methods in this implementation
[INFO] [stdout] 29 |     pub fn id(&self) -> Option<&String> {
[INFO] [stdout]    |            ^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub fn classes(&self) -> HashSet<&str> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `consume_till_str` is never used
[INFO] [stdout]   --> src/css_parser.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl Parser {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 74 |     fn consume_till_str(&mut self, string: &str) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StyledNode` is never constructed
[INFO] [stdout]   --> src/style.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | struct StyledNode<'a> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `PropertyMap` is never used
[INFO] [stdout]   --> src/style.rs:20:6
[INFO] [stdout]    |
[INFO] [stdout] 20 | type PropertyMap = HashMap<String, Value>;
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `matches` is never used
[INFO] [stdout]   --> src/style.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn matches(elem: &ElementData, selector: &Selector) -> bool {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `matches_simple_selector` is never used
[INFO] [stdout]   --> src/style.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn matches_simple_selector(elem: &ElementData, selector: &SimpleSelector) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `MatchedRule` is never used
[INFO] [stdout]   --> src/style.rs:49:6
[INFO] [stdout]    |
[INFO] [stdout] 49 | type MatchedRule<'a> = (Specificity, &'a Rule);
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `match_rule` is never used
[INFO] [stdout]   --> src/style.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn match_rule<'a>(elem: &ElementData, rule: &'a Rule) -> Option<MatchedRule<'a>> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `matching_rules` is never used
[INFO] [stdout]   --> src/style.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn matching_rules<'a>(elem: &ElementData, stylesheet: &'a Stylesheet) -> Vec<MatchedRule<'a>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `specified_values` is never used
[INFO] [stdout]   --> src/style.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn specified_values(elem: &ElementData, stylesheet: &Stylesheet) -> PropertyMap {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `style_tree` is never used
[INFO] [stdout]   --> src/style.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn style_tree<'a>(root: &'a Node, stylesheet: &Stylesheet) -> StyledNode<'a> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/css_parser.rs:235:21
[INFO] [stdout]     |
[INFO] [stdout] 235 |                     self.consume_string("}");
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 235 |                     let _ = self.consume_string("}");
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/css_parser.rs:278:21
[INFO] [stdout]     |
[INFO] [stdout] 278 |                     self.consume_string("px");
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 278 |                     let _ = self.consume_string("px");
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/css_parser.rs:315:9
[INFO] [stdout]     |
[INFO] [stdout] 315 |         self.consume_string("rgb");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 315 |         let _ = self.consume_string("rgb");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "5c409dbac787b14de7b2a6850815b6ea7e7a5fd6e400dc2322cd2a3c2df2806a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c409dbac787b14de7b2a6850815b6ea7e7a5fd6e400dc2322cd2a3c2df2806a", kill_on_drop: false }`
[INFO] [stdout] 5c409dbac787b14de7b2a6850815b6ea7e7a5fd6e400dc2322cd2a3c2df2806a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+eb171a227f9e5de5d376b6edb56b174bc8235fb3" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bbfda659c83f06b2d5bed0aa78828bbdab29fd775f1c399ffa5f6ec0329ee0ff
[INFO] running `Command { std: "docker" "start" "-a" "bbfda659c83f06b2d5bed0aa78828bbdab29fd775f1c399ffa5f6ec0329ee0ff", kill_on_drop: false }`
[INFO] [stderr]    Compiling light-browser-engine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `id` and `classes` are never used
[INFO] [stdout]   --> src/dom.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl ElementData {
[INFO] [stdout]    | ---------------- methods in this implementation
[INFO] [stdout] 29 |     pub fn id(&self) -> Option<&String> {
[INFO] [stdout]    |            ^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub fn classes(&self) -> HashSet<&str> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `consume_till_str` is never used
[INFO] [stdout]   --> src/css_parser.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl Parser {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 74 |     fn consume_till_str(&mut self, string: &str) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StyledNode` is never constructed
[INFO] [stdout]   --> src/style.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | struct StyledNode<'a> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `PropertyMap` is never used
[INFO] [stdout]   --> src/style.rs:20:6
[INFO] [stdout]    |
[INFO] [stdout] 20 | type PropertyMap = HashMap<String, Value>;
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `matches` is never used
[INFO] [stdout]   --> src/style.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn matches(elem: &ElementData, selector: &Selector) -> bool {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `matches_simple_selector` is never used
[INFO] [stdout]   --> src/style.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn matches_simple_selector(elem: &ElementData, selector: &SimpleSelector) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `MatchedRule` is never used
[INFO] [stdout]   --> src/style.rs:49:6
[INFO] [stdout]    |
[INFO] [stdout] 49 | type MatchedRule<'a> = (Specificity, &'a Rule);
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `match_rule` is never used
[INFO] [stdout]   --> src/style.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn match_rule<'a>(elem: &ElementData, rule: &'a Rule) -> Option<MatchedRule<'a>> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `matching_rules` is never used
[INFO] [stdout]   --> src/style.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn matching_rules<'a>(elem: &ElementData, stylesheet: &'a Stylesheet) -> Vec<MatchedRule<'a>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `specified_values` is never used
[INFO] [stdout]   --> src/style.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn specified_values(elem: &ElementData, stylesheet: &Stylesheet) -> PropertyMap {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `style_tree` is never used
[INFO] [stdout]   --> src/style.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn style_tree<'a>(root: &'a Node, stylesheet: &Stylesheet) -> StyledNode<'a> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/css_parser.rs:235:21
[INFO] [stdout]     |
[INFO] [stdout] 235 |                     self.consume_string("}");
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 235 |                     let _ = self.consume_string("}");
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/css_parser.rs:278:21
[INFO] [stdout]     |
[INFO] [stdout] 278 |                     self.consume_string("px");
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 278 |                     let _ = self.consume_string("px");
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/css_parser.rs:315:9
[INFO] [stdout]     |
[INFO] [stdout] 315 |         self.consume_string("rgb");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 315 |         let _ = self.consume_string("rgb");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "bbfda659c83f06b2d5bed0aa78828bbdab29fd775f1c399ffa5f6ec0329ee0ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbfda659c83f06b2d5bed0aa78828bbdab29fd775f1c399ffa5f6ec0329ee0ff", kill_on_drop: false }`
[INFO] [stdout] bbfda659c83f06b2d5bed0aa78828bbdab29fd775f1c399ffa5f6ec0329ee0ff