[INFO] cloning repository https://github.com/Heroadn/simple_context_free_grammar
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Heroadn/simple_context_free_grammar" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHeroadn%2Fsimple_context_free_grammar", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHeroadn%2Fsimple_context_free_grammar'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4f1eb2c927a75f47e7536aaa28e4204ef90f1243
[INFO] checking Heroadn/simple_context_free_grammar against master#0599f3403366d9c57f0625e6de3af214b5042a90 for pr-87710
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHeroadn%2Fsimple_context_free_grammar" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Heroadn/simple_context_free_grammar on toolchain 0599f3403366d9c57f0625e6de3af214b5042a90
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Heroadn/simple_context_free_grammar
[INFO] finished tweaking git repo https://github.com/Heroadn/simple_context_free_grammar
[INFO] tweaked toml for git repo https://github.com/Heroadn/simple_context_free_grammar written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/Heroadn/simple_context_free_grammar already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0f446b8709142b3330c45ac22e4e4b66ced10ca1308a1ec32f354dd6b1069a3c
[INFO] running `Command { std: "docker" "start" "-a" "0f446b8709142b3330c45ac22e4e4b66ced10ca1308a1ec32f354dd6b1069a3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f446b8709142b3330c45ac22e4e4b66ced10ca1308a1ec32f354dd6b1069a3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f446b8709142b3330c45ac22e4e4b66ced10ca1308a1ec32f354dd6b1069a3c", kill_on_drop: false }`
[INFO] [stdout] 0f446b8709142b3330c45ac22e4e4b66ced10ca1308a1ec32f354dd6b1069a3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e296400da8f2ca80d8e1e526da5e151e0bb6f27e1c9b5885ca0f242e89f2eff9
[INFO] running `Command { std: "docker" "start" "-a" "e296400da8f2ca80d8e1e526da5e151e0bb6f27e1c9b5885ca0f242e89f2eff9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking cfg v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `find_token`
[INFO] [stdout]   --> src/cfg.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn find_token(tokens: String, lookahead: String) -> Option<String> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `find_token`
[INFO] [stdout]   --> src/cfg.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn find_token(tokens: String, lookahead: String) -> Option<String> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.87s
[INFO] running `Command { std: "docker" "inspect" "e296400da8f2ca80d8e1e526da5e151e0bb6f27e1c9b5885ca0f242e89f2eff9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e296400da8f2ca80d8e1e526da5e151e0bb6f27e1c9b5885ca0f242e89f2eff9", kill_on_drop: false }`
[INFO] [stdout] e296400da8f2ca80d8e1e526da5e151e0bb6f27e1c9b5885ca0f242e89f2eff9