[INFO] cloning repository https://github.com/sgrowe/compiler-in-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sgrowe/compiler-in-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsgrowe%2Fcompiler-in-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsgrowe%2Fcompiler-in-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] af86decbfe3320cc9b5aed9320e917569e880d00
[INFO] checking sgrowe/compiler-in-rust against try#7b3565da729099dbe807466fcd118fb2815986e0 for pr-81789
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsgrowe%2Fcompiler-in-rust" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sgrowe/compiler-in-rust on toolchain 7b3565da729099dbe807466fcd118fb2815986e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sgrowe/compiler-in-rust
[INFO] finished tweaking git repo https://github.com/sgrowe/compiler-in-rust
[INFO] tweaked toml for git repo https://github.com/sgrowe/compiler-in-rust written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/sgrowe/compiler-in-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded test-case v1.0.0
[INFO] [stderr]   Downloaded insta v1.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 965fe0dfde03738533deaaa19786df12ea3f9ff7ca6fba09cd770250a656fdc8
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "965fe0dfde03738533deaaa19786df12ea3f9ff7ca6fba09cd770250a656fdc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "965fe0dfde03738533deaaa19786df12ea3f9ff7ca6fba09cd770250a656fdc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "965fe0dfde03738533deaaa19786df12ea3f9ff7ca6fba09cd770250a656fdc8", kill_on_drop: false }`
[INFO] [stdout] 965fe0dfde03738533deaaa19786df12ea3f9ff7ca6fba09cd770250a656fdc8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43c0960d3724cc9306fcd1311f649134cefc9931bcbb128265b70fe124b5eb6f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "43c0960d3724cc9306fcd1311f649134cefc9931bcbb128265b70fe124b5eb6f", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling const_fn v0.4.3
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.68
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling bumpalo v3.4.0
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling wasm-bindgen v0.2.68
[INFO] [stderr]     Checking linked-hash-map v0.5.3
[INFO] [stderr]     Checking dtoa v0.4.6
[INFO] [stderr]    Compiling anyhow v1.0.34
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking oorandom v11.1.2
[INFO] [stderr]    Compiling crossbeam-utils v0.8.0
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling tokio v0.3.3
[INFO] [stderr]    Compiling test-case v1.0.0
[INFO] [stderr]     Checking tinyvec v1.0.1
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking yaml-rust v0.4.4
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking termios v0.3.3
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[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking console v0.12.0
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking compiler_core v0.1.0 (/opt/rustwide/workdir/compiler-core)
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> compiler-core/src/analyser.rs:43:21
[INFO] [stdout]    |
[INFO] [stdout] 43 |                     name,
[INFO] [stdout]    |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exported`
[INFO] [stdout]   --> compiler-core/src/analyser.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |             exported,
[INFO] [stdout]    |             ^^^^^^^^ help: try ignoring the field: `exported: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `usage_count`
[INFO] [stdout]   --> compiler-core/src/analyser.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 |             usage_count,
[INFO] [stdout]    |             ^^^^^^^^^^^ help: try ignoring the field: `usage_count: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `statement`
[INFO] [stdout]   --> compiler-core/src/analyser.rs:60:17
[INFO] [stdout]    |
[INFO] [stdout] 60 |             for statement in body.iter().enumerate() {
[INFO] [stdout]    |                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Result`
[INFO] [stdout]  --> compiler-core/src/analyser.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | type Result<'a, X> = std::result::Result<X, AnalyserError<'a>>;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Symbol`
[INFO] [stdout]  --> compiler-core/src/analyser.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Symbol<'a> {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `analyse`
[INFO] [stdout]   --> compiler-core/src/analyser.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn analyse(parser: Parser) -> Result<()> {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking plotters v0.2.15
[INFO] [stderr]     Checking crossbeam-epoch v0.9.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.68
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.68
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling tokio-macros v0.3.1
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.68
[INFO] [stderr]     Checking js-sys v0.3.45
[INFO] [stderr]     Checking compiler_frontend v0.1.0 (/opt/rustwide/workdir/compiler-frontend)
[INFO] [stderr]     Checking serde v1.0.117
[INFO] [stderr]     Checking web-sys v0.3.45
[INFO] [stderr]     Checking serde_json v1.0.59
[INFO] [stderr]     Checking bstr v0.2.14
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking serde_yaml v0.8.14
[INFO] [stderr]     Checking csv v1.1.4
[INFO] [stderr]     Checking tinytemplate v1.1.0
[INFO] [stderr]     Checking insta v1.1.0
[INFO] [stderr]     Checking criterion v0.3.3
[INFO] [stderr]     Checking online-playground v0.1.0 (/opt/rustwide/workdir/online-playground)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> compiler-core/benches/tokeniser_benchmark.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | criterion_group!(benches, criterion_benchmark);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> compiler-core/src/analyser.rs:43:21
[INFO] [stdout]    |
[INFO] [stdout] 43 |                     name,
[INFO] [stdout]    |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exported`
[INFO] [stdout]   --> compiler-core/src/analyser.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |             exported,
[INFO] [stdout]    |             ^^^^^^^^ help: try ignoring the field: `exported: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `usage_count`
[INFO] [stdout]   --> compiler-core/src/analyser.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 |             usage_count,
[INFO] [stdout]    |             ^^^^^^^^^^^ help: try ignoring the field: `usage_count: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `statement`
[INFO] [stdout]   --> compiler-core/src/analyser.rs:60:17
[INFO] [stdout]    |
[INFO] [stdout] 60 |             for statement in body.iter().enumerate() {
[INFO] [stdout]    |                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Result`
[INFO] [stdout]  --> compiler-core/src/analyser.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | type Result<'a, X> = std::result::Result<X, AnalyserError<'a>>;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Symbol`
[INFO] [stdout]  --> compiler-core/src/analyser.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Symbol<'a> {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `analyse`
[INFO] [stdout]   --> compiler-core/src/analyser.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn analyse(parser: Parser) -> Result<()> {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.58s
[INFO] running `Command { std: "docker" "inspect" "43c0960d3724cc9306fcd1311f649134cefc9931bcbb128265b70fe124b5eb6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43c0960d3724cc9306fcd1311f649134cefc9931bcbb128265b70fe124b5eb6f", kill_on_drop: false }`
[INFO] [stdout] 43c0960d3724cc9306fcd1311f649134cefc9931bcbb128265b70fe124b5eb6f