[INFO] cloning repository https://github.com/RaoulLuque/dimacs-petgraph-parser
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/RaoulLuque/dimacs-petgraph-parser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRaoulLuque%2Fdimacs-petgraph-parser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRaoulLuque%2Fdimacs-petgraph-parser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 229657257167888d53f1400c74c208006b1ad95d
[INFO] checking RaoulLuque/dimacs-petgraph-parser/229657257167888d53f1400c74c208006b1ad95d against try#9a6ce9bcee4fff9f2010ea88aaa7654cc4d95132 for pr-133274
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRaoulLuque%2Fdimacs-petgraph-parser" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/RaoulLuque/dimacs-petgraph-parser on toolchain 9a6ce9bcee4fff9f2010ea88aaa7654cc4d95132
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9a6ce9bcee4fff9f2010ea88aaa7654cc4d95132" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/RaoulLuque/dimacs-petgraph-parser
[INFO] finished tweaking git repo https://github.com/RaoulLuque/dimacs-petgraph-parser
[INFO] tweaked toml for git repo https://github.com/RaoulLuque/dimacs-petgraph-parser written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/RaoulLuque/dimacs-petgraph-parser 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" "+9a6ce9bcee4fff9f2010ea88aaa7654cc4d95132" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+9a6ce9bcee4fff9f2010ea88aaa7654cc4d95132" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5a1531fe4257852fececec21c91a1205ee2884edb37d8cbd92f0dc133723e1ad
[INFO] running `Command { std: "docker" "start" "-a" "5a1531fe4257852fececec21c91a1205ee2884edb37d8cbd92f0dc133723e1ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5a1531fe4257852fececec21c91a1205ee2884edb37d8cbd92f0dc133723e1ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a1531fe4257852fececec21c91a1205ee2884edb37d8cbd92f0dc133723e1ad", kill_on_drop: false }`
[INFO] [stdout] 5a1531fe4257852fececec21c91a1205ee2884edb37d8cbd92f0dc133723e1ad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+9a6ce9bcee4fff9f2010ea88aaa7654cc4d95132" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e8ac69020d7c69f7b726900dadb9199d6c6576b223c843f509681d00a705bbe6
[INFO] running `Command { std: "docker" "start" "-a" "e8ac69020d7c69f7b726900dadb9199d6c6576b223c843f509681d00a705bbe6", kill_on_drop: false }`
[INFO] [stderr]     Checking hashbrown v0.14.3
[INFO] [stderr]     Checking equivalent v1.0.1
[INFO] [stderr]     Checking either v1.11.0
[INFO] [stderr]     Checking fixedbitset v0.4.2
[INFO] [stderr]     Checking itertools v0.12.1
[INFO] [stderr]     Checking indexmap v2.2.6
[INFO] [stderr]     Checking petgraph v0.6.4
[INFO] [stderr]     Checking dimacs_petgraph_parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let mut current_line = lines
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let mut current_line = lines
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.73s
[INFO] running `Command { std: "docker" "inspect" "e8ac69020d7c69f7b726900dadb9199d6c6576b223c843f509681d00a705bbe6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8ac69020d7c69f7b726900dadb9199d6c6576b223c843f509681d00a705bbe6", kill_on_drop: false }`
[INFO] [stdout] e8ac69020d7c69f7b726900dadb9199d6c6576b223c843f509681d00a705bbe6