[INFO] cloning repository https://github.com/erikgrinaker/rex
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/erikgrinaker/rex" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferikgrinaker%2Frex", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferikgrinaker%2Frex'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 638525f5b9cba6cb98d412ac3473e98eed3f7e27
[INFO] checking erikgrinaker/rex against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferikgrinaker%2Frex" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/erikgrinaker/rex on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/erikgrinaker/rex
[INFO] finished tweaking git repo https://github.com/erikgrinaker/rex
[INFO] tweaked toml for git repo https://github.com/erikgrinaker/rex written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/erikgrinaker/rex already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5624b1581924154a6f90366a62612a4537eabb6df8f31e2cdf809586cd486d99
[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" "5624b1581924154a6f90366a62612a4537eabb6df8f31e2cdf809586cd486d99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5624b1581924154a6f90366a62612a4537eabb6df8f31e2cdf809586cd486d99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5624b1581924154a6f90366a62612a4537eabb6df8f31e2cdf809586cd486d99", kill_on_drop: false }`
[INFO] [stdout] 5624b1581924154a6f90366a62612a4537eabb6df8f31e2cdf809586cd486d99
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1f78a910f32f7643d68375e5990744f27fa488ebc72c59143c69cd50d135dabf
[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" "1f78a910f32f7643d68375e5990744f27fa488ebc72c59143c69cd50d135dabf", kill_on_drop: false }`
[INFO] [stderr]     Checking rex v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Transition`
[INFO] [stdout]  --> src/compiler.rs:5:49
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::pattern::{Condition, Pattern, State, Transition};
[INFO] [stdout]   |                                                 ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `todo`
[INFO] [stdout]  --> src/pattern.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     todo,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Transition`
[INFO] [stdout]  --> src/compiler.rs:5:49
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::pattern::{Condition, Pattern, State, Transition};
[INFO] [stdout]   |                                                 ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `todo`
[INFO] [stdout]  --> src/pattern.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     todo,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]   --> src/compiler.rs:14:27
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn compile(&self, expr: ast::Expression) -> Result<Pattern> {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `seq`
[INFO] [stdout]   --> src/compiler.rs:22:39
[INFO] [stdout]    |
[INFO] [stdout] 22 |             ast::Expression::Sequence(seq) => {}
[INFO] [stdout]    |                                       ^^^ help: if this is intentional, prefix it with an underscore: `_seq`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/compiler.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |         let mut states = vec![State::Accept];
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]   --> src/compiler.rs:14:27
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn compile(&self, expr: ast::Expression) -> Result<Pattern> {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `seq`
[INFO] [stdout]   --> src/compiler.rs:22:39
[INFO] [stdout]    |
[INFO] [stdout] 22 |             ast::Expression::Sequence(seq) => {}
[INFO] [stdout]    |                                       ^^^ help: if this is intentional, prefix it with an underscore: `_seq`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/compiler.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |         let mut states = vec![State::Accept];
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Class`
[INFO] [stdout]  --> src/ast.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Class(Class),                 // []
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alnum`
[INFO] [stdout]   --> src/ast.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     Alnum,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alpha`
[INFO] [stdout]   --> src/ast.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     Alpha,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Digit`
[INFO] [stdout]   --> src/ast.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     Digit,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Lower`
[INFO] [stdout]   --> src/ast.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     Lower,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Space`
[INFO] [stdout]   --> src/ast.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     Space,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Upper`
[INFO] [stdout]   --> src/ast.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     Upper,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `compile_states`
[INFO] [stdout]   --> src/compiler.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn compile_states(&self, expr: ast::Expression) -> Vec<State> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `compile_condition`
[INFO] [stdout]   --> src/compiler.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn compile_condition(&self, expr: ast::Expression) -> Condition {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `compile`
[INFO] [stdout]   --> src/pattern.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn compile(expr: ast::Expression) -> Result<Pattern> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Match`
[INFO] [stdout]   --> src/pattern.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     Match(Vec<Transition>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Always`
[INFO] [stdout]   --> src/pattern.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 55 |     Always,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Start`
[INFO] [stdout]   --> src/pattern.rs:56:5
[INFO] [stdout]    |
[INFO] [stdout] 56 |     Start,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `End`
[INFO] [stdout]   --> src/pattern.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 57 |     End,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Literal`
[INFO] [stdout]   --> src/pattern.rs:58:5
[INFO] [stdout]    |
[INFO] [stdout] 58 |     Literal(char),
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Class`
[INFO] [stdout]  --> src/ast.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Class(Class),                 // []
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alnum`
[INFO] [stdout]   --> src/ast.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     Alnum,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alpha`
[INFO] [stdout]   --> src/ast.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     Alpha,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Digit`
[INFO] [stdout]   --> src/ast.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     Digit,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Lower`
[INFO] [stdout]   --> src/ast.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     Lower,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Space`
[INFO] [stdout]   --> src/ast.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     Space,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Upper`
[INFO] [stdout]   --> src/ast.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     Upper,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `compile_states`
[INFO] [stdout]   --> src/compiler.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn compile_states(&self, expr: ast::Expression) -> Vec<State> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `compile_condition`
[INFO] [stdout]   --> src/compiler.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn compile_condition(&self, expr: ast::Expression) -> Condition {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `compile`
[INFO] [stdout]   --> src/pattern.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn compile(expr: ast::Expression) -> Result<Pattern> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Match`
[INFO] [stdout]   --> src/pattern.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     Match(Vec<Transition>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Always`
[INFO] [stdout]   --> src/pattern.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 55 |     Always,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Start`
[INFO] [stdout]   --> src/pattern.rs:56:5
[INFO] [stdout]    |
[INFO] [stdout] 56 |     Start,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `End`
[INFO] [stdout]   --> src/pattern.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 57 |     End,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Literal`
[INFO] [stdout]   --> src/pattern.rs:58:5
[INFO] [stdout]    |
[INFO] [stdout] 58 |     Literal(char),
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `Command { std: "docker" "inspect" "1f78a910f32f7643d68375e5990744f27fa488ebc72c59143c69cd50d135dabf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f78a910f32f7643d68375e5990744f27fa488ebc72c59143c69cd50d135dabf", kill_on_drop: false }`
[INFO] [stdout] 1f78a910f32f7643d68375e5990744f27fa488ebc72c59143c69cd50d135dabf