[INFO] cloning repository https://github.com/nnamdiogbu/ferris_grep
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nnamdiogbu/ferris_grep" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnnamdiogbu%2Fferris_grep", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnnamdiogbu%2Fferris_grep'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d1970d8ba6cdc12bc64c1792890d8c63df153123
[INFO] checking nnamdiogbu/ferris_grep against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnnamdiogbu%2Fferris_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/nnamdiogbu/ferris_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] started tweaking git repo https://github.com/nnamdiogbu/ferris_grep
[INFO] finished tweaking git repo https://github.com/nnamdiogbu/ferris_grep
[INFO] tweaked toml for git repo https://github.com/nnamdiogbu/ferris_grep written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/nnamdiogbu/ferris_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] ebe55123f0b3f8c35049984baf5844c232d44d465a75f66865757891e48c9c4a
[INFO] running `Command { std: "docker" "start" "-a" "ebe55123f0b3f8c35049984baf5844c232d44d465a75f66865757891e48c9c4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ebe55123f0b3f8c35049984baf5844c232d44d465a75f66865757891e48c9c4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebe55123f0b3f8c35049984baf5844c232d44d465a75f66865757891e48c9c4a", kill_on_drop: false }`
[INFO] [stdout] ebe55123f0b3f8c35049984baf5844c232d44d465a75f66865757891e48c9c4a
[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] 795cb92c5ea5ad275910cb3f45d7fa6f74258ec3c00dca556490cba873e21baa
[INFO] running `Command { std: "docker" "start" "-a" "795cb92c5ea5ad275910cb3f45d7fa6f74258ec3c00dca556490cba873e21baa", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking os_str_bytes v6.5.0
[INFO] [stderr]     Checking termcolor v1.2.0
[INFO] [stderr]     Checking textwrap v0.16.0
[INFO] [stderr]     Checking regex-syntax v0.7.1
[INFO] [stderr]     Checking owo-colors v3.5.0
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking clap_lex v0.2.4
[INFO] [stderr]     Checking aho-corasick v1.0.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v3.2.25
[INFO] [stderr]     Checking regex v1.8.1
[INFO] [stderr]     Checking ferris_grep v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Flags` is imported redundantly
[INFO] [stdout]    --> src/core/process.rs:437:9
[INFO] [stdout]     |
[INFO] [stdout] 436 |     use super::*;
[INFO] [stdout]     |         -------- the item `Flags` is already imported here
[INFO] [stdout] 437 |     use crate::Flags;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `File` is imported redundantly
[INFO] [stdout]    --> src/core/process.rs:438:9
[INFO] [stdout]     |
[INFO] [stdout] 436 |     use super::*;
[INFO] [stdout]     |         -------- the item `File` is already imported here
[INFO] [stdout] 437 |     use crate::Flags;
[INFO] [stdout] 438 |     use std::fs::File;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BufReader` is imported redundantly
[INFO] [stdout]    --> src/core/process.rs:439:9
[INFO] [stdout]     |
[INFO] [stdout] 436 |     use super::*;
[INFO] [stdout]     |         -------- the item `BufReader` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 439 |     use std::io::BufReader;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.35s
[INFO] running `Command { std: "docker" "inspect" "795cb92c5ea5ad275910cb3f45d7fa6f74258ec3c00dca556490cba873e21baa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "795cb92c5ea5ad275910cb3f45d7fa6f74258ec3c00dca556490cba873e21baa", kill_on_drop: false }`
[INFO] [stdout] 795cb92c5ea5ad275910cb3f45d7fa6f74258ec3c00dca556490cba873e21baa
[INFO] checking nnamdiogbu/ferris_grep against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnnamdiogbu%2Fferris_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/nnamdiogbu/ferris_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] started tweaking git repo https://github.com/nnamdiogbu/ferris_grep
[INFO] finished tweaking git repo https://github.com/nnamdiogbu/ferris_grep
[INFO] tweaked toml for git repo https://github.com/nnamdiogbu/ferris_grep written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/nnamdiogbu/ferris_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] 0628e2ff0bd85ee576fee841375ddee801f34141c53b414460d79624f79442f6
[INFO] running `Command { std: "docker" "start" "-a" "0628e2ff0bd85ee576fee841375ddee801f34141c53b414460d79624f79442f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0628e2ff0bd85ee576fee841375ddee801f34141c53b414460d79624f79442f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0628e2ff0bd85ee576fee841375ddee801f34141c53b414460d79624f79442f6", kill_on_drop: false }`
[INFO] [stdout] 0628e2ff0bd85ee576fee841375ddee801f34141c53b414460d79624f79442f6
[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] 852251ffa9e165c23944a23a9136b724337fc9a9240dd62e090724c2996a90eb
[INFO] running `Command { std: "docker" "start" "-a" "852251ffa9e165c23944a23a9136b724337fc9a9240dd62e090724c2996a90eb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking os_str_bytes v6.5.0
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking textwrap v0.16.0
[INFO] [stderr]     Checking regex-syntax v0.7.1
[INFO] [stderr]     Checking termcolor v1.2.0
[INFO] [stderr]     Checking owo-colors v3.5.0
[INFO] [stderr]     Checking clap_lex v0.2.4
[INFO] [stderr]     Checking aho-corasick v1.0.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v3.2.25
[INFO] [stderr]     Checking regex v1.8.1
[INFO] [stderr]     Checking ferris_grep v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Flags` is imported redundantly
[INFO] [stdout]    --> src/core/process.rs:437:9
[INFO] [stdout]     |
[INFO] [stdout] 436 |     use super::*;
[INFO] [stdout]     |         -------- the item `Flags` is already imported here
[INFO] [stdout] 437 |     use crate::Flags;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `File` is imported redundantly
[INFO] [stdout]    --> src/core/process.rs:438:9
[INFO] [stdout]     |
[INFO] [stdout] 436 |     use super::*;
[INFO] [stdout]     |         -------- the item `File` is already imported here
[INFO] [stdout] 437 |     use crate::Flags;
[INFO] [stdout] 438 |     use std::fs::File;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BufReader` is imported redundantly
[INFO] [stdout]    --> src/core/process.rs:439:9
[INFO] [stdout]     |
[INFO] [stdout] 436 |     use super::*;
[INFO] [stdout]     |         -------- the item `BufReader` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 439 |     use std::io::BufReader;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.32s
[INFO] running `Command { std: "docker" "inspect" "852251ffa9e165c23944a23a9136b724337fc9a9240dd62e090724c2996a90eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "852251ffa9e165c23944a23a9136b724337fc9a9240dd62e090724c2996a90eb", kill_on_drop: false }`
[INFO] [stdout] 852251ffa9e165c23944a23a9136b724337fc9a9240dd62e090724c2996a90eb