[INFO] cloning repository https://github.com/Vonr/rust_grep
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Vonr/rust_grep" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVonr%2Frust_grep", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVonr%2Frust_grep'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6e56f0f26946e80dc637e7a8e8e40b89553ffec1
[INFO] checking Vonr/rust_grep against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVonr%2Frust_grep" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Vonr/rust_grep on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2-tc1/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/Vonr/rust_grep
[INFO] finished tweaking git repo https://github.com/Vonr/rust_grep
[INFO] tweaked toml for git repo https://github.com/Vonr/rust_grep written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Vonr/rust_grep 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e674fcdaaa9f82eaf5fd11d0e32bbd008a5d652717eca9538004320a037bd8b5
[INFO] running `Command { std: "docker" "start" "-a" "e674fcdaaa9f82eaf5fd11d0e32bbd008a5d652717eca9538004320a037bd8b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e674fcdaaa9f82eaf5fd11d0e32bbd008a5d652717eca9538004320a037bd8b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e674fcdaaa9f82eaf5fd11d0e32bbd008a5d652717eca9538004320a037bd8b5", kill_on_drop: false }`
[INFO] [stdout] e674fcdaaa9f82eaf5fd11d0e32bbd008a5d652717eca9538004320a037bd8b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 07b56a841ea2b8237ff5f74d06b3429c0dd1d4366f9694696ac6b6e902539e2f
[INFO] running `Command { std: "docker" "start" "-a" "07b56a841ea2b8237ff5f74d06b3429c0dd1d4366f9694696ac6b6e902539e2f", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]     Checking regex-syntax v0.7.4
[INFO] [stderr]    Compiling regex-syntax v0.8.2
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking walkdir v2.4.0
[INFO] [stderr]     Checking aho-corasick v1.0.2
[INFO] [stderr]     Checking regex-automata v0.4.3
[INFO] [stderr]     Checking regex-automata v0.3.3
[INFO] [stderr]     Checking bstr v1.6.0
[INFO] [stderr]     Checking regex v1.9.1
[INFO] [stderr]    Compiling grepox v0.2.22 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `Bitflag` is never used
[INFO] [stdout]   --> src/trait_ext.rs:61:11
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub trait Bitflag {
[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: trait `Bitflag` is never used
[INFO] [stdout]   --> src/trait_ext.rs:61:11
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub trait Bitflag {
[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` profile [unoptimized + debuginfo] target(s) in 12.72s
[INFO] running `Command { std: "docker" "inspect" "07b56a841ea2b8237ff5f74d06b3429c0dd1d4366f9694696ac6b6e902539e2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07b56a841ea2b8237ff5f74d06b3429c0dd1d4366f9694696ac6b6e902539e2f", kill_on_drop: false }`
[INFO] [stdout] 07b56a841ea2b8237ff5f74d06b3429c0dd1d4366f9694696ac6b6e902539e2f
[INFO] checking Vonr/rust_grep against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVonr%2Frust_grep" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Vonr/rust_grep on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/Vonr/rust_grep
[INFO] finished tweaking git repo https://github.com/Vonr/rust_grep
[INFO] tweaked toml for git repo https://github.com/Vonr/rust_grep written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Vonr/rust_grep 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "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/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8ae9635d179d442b974ad74ab65a79430bd82da0ba765b20871f0bcd6f3b2b2b
[INFO] running `Command { std: "docker" "start" "-a" "8ae9635d179d442b974ad74ab65a79430bd82da0ba765b20871f0bcd6f3b2b2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8ae9635d179d442b974ad74ab65a79430bd82da0ba765b20871f0bcd6f3b2b2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ae9635d179d442b974ad74ab65a79430bd82da0ba765b20871f0bcd6f3b2b2b", kill_on_drop: false }`
[INFO] [stdout] 8ae9635d179d442b974ad74ab65a79430bd82da0ba765b20871f0bcd6f3b2b2b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37e6303c01ab1e248bd7b31396aa5dbb93a176e6f0ed38babafbb2e37bd91079
[INFO] running `Command { std: "docker" "start" "-a" "37e6303c01ab1e248bd7b31396aa5dbb93a176e6f0ed38babafbb2e37bd91079", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]     Checking regex-syntax v0.7.4
[INFO] [stderr]    Compiling regex-syntax v0.8.2
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking walkdir v2.4.0
[INFO] [stderr]    Compiling aho-corasick v1.0.2
[INFO] [stderr]     Checking regex-automata v0.4.3
[INFO] [stderr]     Checking regex-automata v0.3.3
[INFO] [stderr]     Checking bstr v1.6.0
[INFO] [stderr]     Checking regex v1.9.1
[INFO] [stderr]    Compiling grepox v0.2.22 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `Bitflag` is never used
[INFO] [stdout]   --> src/trait_ext.rs:61:11
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub trait Bitflag {
[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: trait `Bitflag` is never used
[INFO] [stdout]   --> src/trait_ext.rs:61:11
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub trait Bitflag {
[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` profile [unoptimized + debuginfo] target(s) in 13.55s
[INFO] running `Command { std: "docker" "inspect" "37e6303c01ab1e248bd7b31396aa5dbb93a176e6f0ed38babafbb2e37bd91079", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37e6303c01ab1e248bd7b31396aa5dbb93a176e6f0ed38babafbb2e37bd91079", kill_on_drop: false }`
[INFO] [stdout] 37e6303c01ab1e248bd7b31396aa5dbb93a176e6f0ed38babafbb2e37bd91079