[INFO] cloning repository https://github.com/ashyanSpada/simple_peg_rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ashyanSpada/simple_peg_rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FashyanSpada%2Fsimple_peg_rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FashyanSpada%2Fsimple_peg_rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e392dbda0b9de05b7d584484be39d64c4320bb5a
[INFO] checking ashyanSpada/simple_peg_rs against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145342-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FashyanSpada%2Fsimple_peg_rs" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ashyanSpada/simple_peg_rs
[INFO] finished tweaking git repo https://github.com/ashyanSpada/simple_peg_rs
[INFO] tweaked toml for git repo https://github.com/ashyanSpada/simple_peg_rs written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ashyanSpada/simple_peg_rs on toolchain 350d0ef0ec0493e6d21cfb265cb8211a0e74d766
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ashyanSpada/simple_peg_rs 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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7039cab8ec99b4e893d66f2d22064637be01cafb60dc16575f882945120183b0
[INFO] running `Command { std: "docker" "start" "-a" "7039cab8ec99b4e893d66f2d22064637be01cafb60dc16575f882945120183b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7039cab8ec99b4e893d66f2d22064637be01cafb60dc16575f882945120183b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7039cab8ec99b4e893d66f2d22064637be01cafb60dc16575f882945120183b0", kill_on_drop: false }`
[INFO] [stdout] 7039cab8ec99b4e893d66f2d22064637be01cafb60dc16575f882945120183b0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d676e6f981f42ddfa0e676575d0dfab9942835562cdefeae4d4946aa072ef199
[INFO] running `Command { std: "docker" "start" "-a" "d676e6f981f42ddfa0e676575d0dfab9942835562cdefeae4d4946aa072ef199", kill_on_drop: false }`
[INFO] [stderr]     Checking simple_peg v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]   --> src/peg.rs:91:13
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/peg.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[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: `stack`
[INFO] [stdout]    --> src/peg.rs:205:13
[INFO] [stdout]     |
[INFO] [stdout] 205 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/peg.rs:205:9
[INFO] [stdout]     |
[INFO] [stdout] 205 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]    --> src/peg.rs:670:13
[INFO] [stdout]     |
[INFO] [stdout] 670 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/peg.rs:670:9
[INFO] [stdout]     |
[INFO] [stdout] 670 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]    --> src/peg.rs:714:13
[INFO] [stdout]     |
[INFO] [stdout] 714 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/peg.rs:714:9
[INFO] [stdout]     |
[INFO] [stdout] 714 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1034:13
[INFO] [stdout]      |
[INFO] [stdout] 1034 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1034:9
[INFO] [stdout]      |
[INFO] [stdout] 1034 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1286:13
[INFO] [stdout]      |
[INFO] [stdout] 1286 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1286:9
[INFO] [stdout]      |
[INFO] [stdout] 1286 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1341:13
[INFO] [stdout]      |
[INFO] [stdout] 1341 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1341:9
[INFO] [stdout]      |
[INFO] [stdout] 1341 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1396:13
[INFO] [stdout]      |
[INFO] [stdout] 1396 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1396:9
[INFO] [stdout]      |
[INFO] [stdout] 1396 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1542:13
[INFO] [stdout]      |
[INFO] [stdout] 1542 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1542:9
[INFO] [stdout]      |
[INFO] [stdout] 1542 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `memo`
[INFO] [stdout]    --> src/utils.rs:144:5
[INFO] [stdout]     |
[INFO] [stdout] 144 |     memo: &'a Memo<String>,
[INFO] [stdout]     |     ^^^^ help: if this is intentional, prefix it with an underscore: `_memo`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]   --> src/peg.rs:91:13
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/peg.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[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: `stack`
[INFO] [stdout]    --> src/peg.rs:205:13
[INFO] [stdout]     |
[INFO] [stdout] 205 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/peg.rs:205:9
[INFO] [stdout]     |
[INFO] [stdout] 205 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]    --> src/peg.rs:670:13
[INFO] [stdout]     |
[INFO] [stdout] 670 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/peg.rs:670:9
[INFO] [stdout]     |
[INFO] [stdout] 670 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]    --> src/peg.rs:714:13
[INFO] [stdout]     |
[INFO] [stdout] 714 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/peg.rs:714:9
[INFO] [stdout]     |
[INFO] [stdout] 714 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1034:13
[INFO] [stdout]      |
[INFO] [stdout] 1034 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1034:9
[INFO] [stdout]      |
[INFO] [stdout] 1034 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1286:13
[INFO] [stdout]      |
[INFO] [stdout] 1286 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1286:9
[INFO] [stdout]      |
[INFO] [stdout] 1286 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1341:13
[INFO] [stdout]      |
[INFO] [stdout] 1341 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1341:9
[INFO] [stdout]      |
[INFO] [stdout] 1341 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1396:13
[INFO] [stdout]      |
[INFO] [stdout] 1396 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1396:9
[INFO] [stdout]      |
[INFO] [stdout] 1396 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1542:13
[INFO] [stdout]      |
[INFO] [stdout] 1542 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1542:9
[INFO] [stdout]      |
[INFO] [stdout] 1542 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `memo`
[INFO] [stdout]    --> src/utils.rs:144:5
[INFO] [stdout]     |
[INFO] [stdout] 144 |     memo: &'a Memo<String>,
[INFO] [stdout]     |     ^^^^ help: if this is intentional, prefix it with an underscore: `_memo`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "d676e6f981f42ddfa0e676575d0dfab9942835562cdefeae4d4946aa072ef199", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d676e6f981f42ddfa0e676575d0dfab9942835562cdefeae4d4946aa072ef199", kill_on_drop: false }`
[INFO] [stdout] d676e6f981f42ddfa0e676575d0dfab9942835562cdefeae4d4946aa072ef199