[INFO] cloning repository https://github.com/goshorting/lrn_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/goshorting/lrn_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgoshorting%2Flrn_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgoshorting%2Flrn_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c4ff01f5f11f9970de753604960676ce2868e703
[INFO] checking goshorting/lrn_rust against try#3bb2879ea9e58d65b875f9a98df44f4a43ce2597 for pr-85387
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgoshorting%2Flrn_rust" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/goshorting/lrn_rust on toolchain 3bb2879ea9e58d65b875f9a98df44f4a43ce2597
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/goshorting/lrn_rust
[INFO] finished tweaking git repo https://github.com/goshorting/lrn_rust
[INFO] tweaked toml for git repo https://github.com/goshorting/lrn_rust written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/goshorting/lrn_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7c2b0e76eb9749c712128edfef34064399f010e5e687cef02a2519b1bf8ecaee
[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" "7c2b0e76eb9749c712128edfef34064399f010e5e687cef02a2519b1bf8ecaee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c2b0e76eb9749c712128edfef34064399f010e5e687cef02a2519b1bf8ecaee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c2b0e76eb9749c712128edfef34064399f010e5e687cef02a2519b1bf8ecaee", kill_on_drop: false }`
[INFO] [stdout] 7c2b0e76eb9749c712128edfef34064399f010e5e687cef02a2519b1bf8ecaee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "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] 08faecbc69bc6b1209de8ccfa5b2e5ab8c630e812391522ff84e24461d83c4b4
[INFO] running `Command { std: "docker" "start" "-a" "08faecbc69bc6b1209de8ccfa5b2e5ab8c630e812391522ff84e24461d83c4b4", kill_on_drop: false }`
[INFO] [stderr]     Checking lrn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `V` should have a snake case name
[INFO] [stdout]  --> src/main.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |         Ok(V) => println!("{}",V),
[INFO] [stdout]   |            ^ help: convert the identifier to snake case (notice the capitalization): `v`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `E` should have a snake case name
[INFO] [stdout]  --> src/main.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |         Err(E) => println!("{}",E)
[INFO] [stdout]   |             ^ help: convert the identifier to snake case: `e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `V` should have a snake case name
[INFO] [stdout]  --> src/main.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |         Ok(V) => println!("{}",V),
[INFO] [stdout]   |            ^ help: convert the identifier to snake case (notice the capitalization): `v`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `E` should have a snake case name
[INFO] [stdout]  --> src/main.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |         Err(E) => println!("{}",E)
[INFO] [stdout]   |             ^ help: convert the identifier to snake case: `e`
[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 0.24s
[INFO] running `Command { std: "docker" "inspect" "08faecbc69bc6b1209de8ccfa5b2e5ab8c630e812391522ff84e24461d83c4b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08faecbc69bc6b1209de8ccfa5b2e5ab8c630e812391522ff84e24461d83c4b4", kill_on_drop: false }`
[INFO] [stdout] 08faecbc69bc6b1209de8ccfa5b2e5ab8c630e812391522ff84e24461d83c4b4