[INFO] cloning repository https://github.com/rakshith-git/Rust_Learing
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rakshith-git/Rust_Learing" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frakshith-git%2FRust_Learing", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frakshith-git%2FRust_Learing'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ce92c5d12865f0f8f6b65448318daeffdfcc5461
[INFO] checking rakshith-git/Rust_Learing against try#099af82bc034c1e4895c90e5407fafdd61976cdb for pr-145457
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frakshith-git%2FRust_Learing" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/rakshith-git/Rust_Learing
[INFO] finished tweaking git repo https://github.com/rakshith-git/Rust_Learing
[INFO] tweaked toml for git repo https://github.com/rakshith-git/Rust_Learing written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/rakshith-git/Rust_Learing on toolchain 099af82bc034c1e4895c90e5407fafdd61976cdb
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+099af82bc034c1e4895c90e5407fafdd61976cdb" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/rakshith-git/Rust_Learing 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" "+099af82bc034c1e4895c90e5407fafdd61976cdb" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+099af82bc034c1e4895c90e5407fafdd61976cdb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 01c248635b33fc12f64a5c0c1de045104203edab37b1f9d2d583fdfd2070d892
[INFO] running `Command { std: "docker" "start" "-a" "01c248635b33fc12f64a5c0c1de045104203edab37b1f9d2d583fdfd2070d892", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "01c248635b33fc12f64a5c0c1de045104203edab37b1f9d2d583fdfd2070d892", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01c248635b33fc12f64a5c0c1de045104203edab37b1f9d2d583fdfd2070d892", kill_on_drop: false }`
[INFO] [stdout] 01c248635b33fc12f64a5c0c1de045104203edab37b1f9d2d583fdfd2070d892
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+099af82bc034c1e4895c90e5407fafdd61976cdb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c45cb312028eee18ee01309fc1f98640334278818b4bb610550d6233ed2f6f72
[INFO] running `Command { std: "docker" "start" "-a" "c45cb312028eee18ee01309fc1f98640334278818b4bb610550d6233ed2f6f72", kill_on_drop: false }`
[INFO] [stderr]     Checking firstProj v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `a` is never read
[INFO] [stdout]  --> src/main.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut a : i128 =0;
[INFO] [stdout]   |             ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `a` is never read
[INFO] [stdout]  --> src/main.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut a : i128 =0;
[INFO] [stdout]   |             ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "c45cb312028eee18ee01309fc1f98640334278818b4bb610550d6233ed2f6f72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c45cb312028eee18ee01309fc1f98640334278818b4bb610550d6233ed2f6f72", kill_on_drop: false }`
[INFO] [stdout] c45cb312028eee18ee01309fc1f98640334278818b4bb610550d6233ed2f6f72