[INFO] cloning repository https://github.com/Sachin-Bhat/grrs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Sachin-Bhat/grrs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSachin-Bhat%2Fgrrs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSachin-Bhat%2Fgrrs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5e793821ff1e16d00c315f0adc0265584cd7a863
[INFO] checking Sachin-Bhat/grrs against try#b1f2594eac607c1f051534800237eeedb5590a49 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSachin-Bhat%2Fgrrs" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Sachin-Bhat/grrs
[INFO] finished tweaking git repo https://github.com/Sachin-Bhat/grrs
[INFO] tweaked toml for git repo https://github.com/Sachin-Bhat/grrs written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Sachin-Bhat/grrs on toolchain b1f2594eac607c1f051534800237eeedb5590a49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Sachin-Bhat/grrs 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" "+b1f2594eac607c1f051534800237eeedb5590a49" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1034921bc5d7b42823825004c9df32cd470b9246cc0c7c8136e3fc58a56ec251
[INFO] running `Command { std: "docker" "start" "-a" "1034921bc5d7b42823825004c9df32cd470b9246cc0c7c8136e3fc58a56ec251", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1034921bc5d7b42823825004c9df32cd470b9246cc0c7c8136e3fc58a56ec251", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1034921bc5d7b42823825004c9df32cd470b9246cc0c7c8136e3fc58a56ec251", kill_on_drop: false }`
[INFO] [stdout] 1034921bc5d7b42823825004c9df32cd470b9246cc0c7c8136e3fc58a56ec251
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fba7c84b69d6a3dd1de82e9e2424f0ef07c60da76d74a1d76c70a78c7e31aacd
[INFO] running `Command { std: "docker" "start" "-a" "fba7c84b69d6a3dd1de82e9e2424f0ef07c60da76d74a1d76c70a78c7e31aacd", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]    Compiling anyhow v1.0.58
[INFO] [stderr]     Checking hashbrown v0.12.1
[INFO] [stderr]     Checking clap_lex v0.2.4
[INFO] [stderr]     Checking predicates-core v1.0.3
[INFO] [stderr]     Checking regex-syntax v0.6.26
[INFO] [stderr]     Checking float-cmp v0.9.0
[INFO] [stderr]     Checking termtree v0.2.4
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking predicates-tree v1.0.5
[INFO] [stderr]     Checking regex v1.5.6
[INFO] [stderr]     Checking predicates v2.1.1
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking assert_cmd v2.0.4
[INFO] [stderr]    Compiling clap_derive v3.2.7
[INFO] [stderr]     Checking clap v3.2.8
[INFO] [stderr]     Checking grrs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/lib.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |             writeln!(writer, "{}", line);
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 4 |             let _ = writeln!(writer, "{}", line);
[INFO] [stdout]   |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/lib.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |             writeln!(writer, "{}", line);
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 4 |             let _ = writeln!(writer, "{}", line);
[INFO] [stdout]   |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.81s
[INFO] running `Command { std: "docker" "inspect" "fba7c84b69d6a3dd1de82e9e2424f0ef07c60da76d74a1d76c70a78c7e31aacd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fba7c84b69d6a3dd1de82e9e2424f0ef07c60da76d74a1d76c70a78c7e31aacd", kill_on_drop: false }`
[INFO] [stdout] fba7c84b69d6a3dd1de82e9e2424f0ef07c60da76d74a1d76c70a78c7e31aacd