[INFO] cloning repository https://github.com/cstorey/gll-experiments
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cstorey/gll-experiments" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcstorey%2Fgll-experiments", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcstorey%2Fgll-experiments'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 31e529f404d371a044cef55fdd449c6989a52c18
[INFO] checking cstorey/gll-experiments against try#ff044a3d65d25a17c3e14c1530004e1540179ba7 for pr-78338
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcstorey%2Fgll-experiments" "/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/cstorey/gll-experiments on toolchain ff044a3d65d25a17c3e14c1530004e1540179ba7
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff044a3d65d25a17c3e14c1530004e1540179ba7" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cstorey/gll-experiments
[INFO] finished tweaking git repo https://github.com/cstorey/gll-experiments
[INFO] tweaked toml for git repo https://github.com/cstorey/gll-experiments written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/cstorey/gll-experiments already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff044a3d65d25a17c3e14c1530004e1540179ba7" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+ff044a3d65d25a17c3e14c1530004e1540179ba7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c42712be25d2de24bec613dca9c844f43beb734f7c59d6ac0f7c1dfd8403fb4c
[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" "c42712be25d2de24bec613dca9c844f43beb734f7c59d6ac0f7c1dfd8403fb4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c42712be25d2de24bec613dca9c844f43beb734f7c59d6ac0f7c1dfd8403fb4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c42712be25d2de24bec613dca9c844f43beb734f7c59d6ac0f7c1dfd8403fb4c", kill_on_drop: false }`
[INFO] [stdout] c42712be25d2de24bec613dca9c844f43beb734f7c59d6ac0f7c1dfd8403fb4c
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+ff044a3d65d25a17c3e14c1530004e1540179ba7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6fa9473c2b8dc7da1b47cef48833de0807476c7b8a7a42b61e3966a9b7e93564
[INFO] running `Command { std: "docker" "start" "-a" "6fa9473c2b8dc7da1b47cef48833de0807476c7b8a7a42b61e3966a9b7e93564", kill_on_drop: false }`
[INFO] [stderr]     Checking gll-examples v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:102:17
[INFO] [stdout]     |
[INFO] [stdout] 102 |             let mut fromv = self.gss.entry(v).or_insert_with(BTreeSet::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: type alias is never used: `Stack`
[INFO] [stdout]   --> src/main.rs:42:1
[INFO] [stdout]    |
[INFO] [stdout] 42 | type Stack = VecDeque<Extlbl>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:102:17
[INFO] [stdout]     |
[INFO] [stdout] 102 |             let mut fromv = self.gss.entry(v).or_insert_with(BTreeSet::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: type alias is never used: `Stack`
[INFO] [stdout]   --> src/main.rs:42:1
[INFO] [stdout]    |
[INFO] [stdout] 42 | type Stack = VecDeque<Extlbl>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `Command { std: "docker" "inspect" "6fa9473c2b8dc7da1b47cef48833de0807476c7b8a7a42b61e3966a9b7e93564", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6fa9473c2b8dc7da1b47cef48833de0807476c7b8a7a42b61e3966a9b7e93564", kill_on_drop: false }`
[INFO] [stdout] 6fa9473c2b8dc7da1b47cef48833de0807476c7b8a7a42b61e3966a9b7e93564