[INFO] cloning repository https://github.com/zerokpr/cflatrs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zerokpr/cflatrs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzerokpr%2Fcflatrs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzerokpr%2Fcflatrs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2ba9c45a09b0d7e1c19217bb35cd8fb66765cb7b
[INFO] checking zerokpr/cflatrs against f99a7560a6b5f0a5e6894aea7e8afe0e01d3edd1 for pr-160235-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzerokpr%2Fcflatrs" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/zerokpr/cflatrs
[INFO] finished tweaking git repo https://github.com/zerokpr/cflatrs
[INFO] tweaked toml for git repo https://github.com/zerokpr/cflatrs written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/zerokpr/cflatrs on toolchain f99a7560a6b5f0a5e6894aea7e8afe0e01d3edd1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f99a7560a6b5f0a5e6894aea7e8afe0e01d3edd1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/zerokpr/cflatrs 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" "+f99a7560a6b5f0a5e6894aea7e8afe0e01d3edd1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] cd80a815da587928663c683cd7b796def42b2c45207f93c07c33022116957fc6
[INFO] running `Command { std: "docker" "start" "cd80a815da587928663c683cd7b796def42b2c45207f93c07c33022116957fc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cd80a815da587928663c683cd7b796def42b2c45207f93c07c33022116957fc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "cd80a815da587928663c683cd7b796def42b2c45207f93c07c33022116957fc6" "/opt/rustwide/cargo-home/bin/cargo" "+f99a7560a6b5f0a5e6894aea7e8afe0e01d3edd1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cd80a815da587928663c683cd7b796def42b2c45207f93c07c33022116957fc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "cd80a815da587928663c683cd7b796def42b2c45207f93c07c33022116957fc6" "/opt/rustwide/cargo-home/bin/cargo" "+f99a7560a6b5f0a5e6894aea7e8afe0e01d3edd1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.8.0
[INFO] [stderr]     Checking aho-corasick v1.1.4
[INFO] [stderr]     Checking regex-automata v0.4.14
[INFO] [stderr]     Checking regex v1.12.3
[INFO] [stderr]     Checking cflatrs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parser.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 |         let mut idx = 0;
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `idx`
[INFO] [stdout]   --> src/parser.rs:14:22
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let (import_stmts, idx) = self.parse_import_stmts(idx)?;
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_idx`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parser.rs:54:7
[INFO] [stdout]    |
[INFO] [stdout] 54 |         let mut ret = "".to_string();
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parser.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 |         let mut idx = 0;
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `idx`
[INFO] [stdout]   --> src/parser.rs:14:22
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let (import_stmts, idx) = self.parse_import_stmts(idx)?;
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_idx`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parser.rs:54:7
[INFO] [stdout]    |
[INFO] [stdout] 54 |         let mut ret = "".to_string();
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.00s
[INFO] running `Command { std: "docker" "inspect" "cd80a815da587928663c683cd7b796def42b2c45207f93c07c33022116957fc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd80a815da587928663c683cd7b796def42b2c45207f93c07c33022116957fc6", kill_on_drop: false }`
[INFO] [stdout] cd80a815da587928663c683cd7b796def42b2c45207f93c07c33022116957fc6