[INFO] cloning repository https://github.com/Discord-CSS-Datamining/discord-css-differ
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Discord-CSS-Datamining/discord-css-differ" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDiscord-CSS-Datamining%2Fdiscord-css-differ", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDiscord-CSS-Datamining%2Fdiscord-css-differ'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bf235a1a953d1e48282a892a0e18e09e441e092e
[INFO] checking Discord-CSS-Datamining/discord-css-differ against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDiscord-CSS-Datamining%2Fdiscord-css-differ" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Discord-CSS-Datamining/discord-css-differ
[INFO] finished tweaking git repo https://github.com/Discord-CSS-Datamining/discord-css-differ
[INFO] tweaked toml for git repo https://github.com/Discord-CSS-Datamining/discord-css-differ written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Discord-CSS-Datamining/discord-css-differ on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Discord-CSS-Datamining/discord-css-differ 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4f9039dd82a611ecadd7da3ea20d769fa8325f00a5af8436aeea7b4948208109
[INFO] running `Command { std: "docker" "start" "-a" "4f9039dd82a611ecadd7da3ea20d769fa8325f00a5af8436aeea7b4948208109", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f9039dd82a611ecadd7da3ea20d769fa8325f00a5af8436aeea7b4948208109", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f9039dd82a611ecadd7da3ea20d769fa8325f00a5af8436aeea7b4948208109", kill_on_drop: false }`
[INFO] [stdout] 4f9039dd82a611ecadd7da3ea20d769fa8325f00a5af8436aeea7b4948208109
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 05a15049c71dd75ecc52e6cac671f093e32b27404e03255d756b4329fb387edd
[INFO] running `Command { std: "docker" "start" "-a" "05a15049c71dd75ecc52e6cac671f093e32b27404e03255d756b4329fb387edd", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]     Checking dtoa v1.0.9
[INFO] [stderr]     Checking smallvec v1.11.1
[INFO] [stderr]    Compiling phf_shared v0.11.2
[INFO] [stderr]     Checking dtoa-short v0.3.4
[INFO] [stderr]    Compiling phf_generator v0.11.2
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]    Compiling phf_macros v0.11.2
[INFO] [stderr]    Compiling cssparser-macros v0.6.1
[INFO] [stderr]     Checking phf v0.11.2
[INFO] [stderr]     Checking cssparser v0.33.0
[INFO] [stderr]     Checking discord-css-parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `operator`
[INFO] [stdout]   --> src/main.rs:79:42
[INFO] [stdout]    |
[INFO] [stdout] 79 |             SelectorExpression::Operator(operator) => {
[INFO] [stdout]    |                                          ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operator`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `operator`
[INFO] [stdout]   --> src/main.rs:79:42
[INFO] [stdout]    |
[INFO] [stdout] 79 |             SelectorExpression::Operator(operator) => {
[INFO] [stdout]    |                                          ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operator`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/main.rs:240:13
[INFO] [stdout]     |
[INFO] [stdout] 240 |         let line = parser.current_line();
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_line`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/main.rs:240:13
[INFO] [stdout]     |
[INFO] [stdout] 240 |         let line = parser.current_line();
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_line`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Column` is never constructed
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | enum SelectorOperator {
[INFO] [stdout]    |      ---------------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 11 |     Column, // ||
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SelectorOperator` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `selector` is never read
[INFO] [stdout]   --> src/main.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 33 | struct Attribute {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 34 |     selector: Box<Selector>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Attribute` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:120:27
[INFO] [stdout]     |
[INFO] [stdout] 120 |         let key: String = input.expect_ident()?.parse().unwrap();
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:130:18
[INFO] [stdout]     |
[INFO] [stdout] 130 |             key: key.parse().unwrap(),
[INFO] [stdout]     |                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:221:36
[INFO] [stdout]     |
[INFO] [stdout] 221 |                         attribute: "lazy".parse().unwrap()
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:231:36
[INFO] [stdout]     |
[INFO] [stdout] 231 |                         attribute: "lazy".parse().unwrap()
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Column` is never constructed
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | enum SelectorOperator {
[INFO] [stdout]    |      ---------------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 11 |     Column, // ||
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SelectorOperator` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `selector` is never read
[INFO] [stdout]   --> src/main.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 33 | struct Attribute {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 34 |     selector: Box<Selector>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Attribute` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `discord-css-parser` (bin "discord-css-parser" test) due to 4 previous errors; 5 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:120:27
[INFO] [stdout]     |
[INFO] [stdout] 120 |         let key: String = input.expect_ident()?.parse().unwrap();
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:130:18
[INFO] [stdout]     |
[INFO] [stdout] 130 |             key: key.parse().unwrap(),
[INFO] [stdout]     |                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:221:36
[INFO] [stdout]     |
[INFO] [stdout] 221 |                         attribute: "lazy".parse().unwrap()
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:231:36
[INFO] [stdout]     |
[INFO] [stdout] 231 |                         attribute: "lazy".parse().unwrap()
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `discord-css-parser` (bin "discord-css-parser") due to 4 previous errors; 5 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "05a15049c71dd75ecc52e6cac671f093e32b27404e03255d756b4329fb387edd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05a15049c71dd75ecc52e6cac671f093e32b27404e03255d756b4329fb387edd", kill_on_drop: false }`
[INFO] [stdout] 05a15049c71dd75ecc52e6cac671f093e32b27404e03255d756b4329fb387edd