[INFO] cloning repository https://github.com/rfasioli/rust_basics
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rfasioli/rust_basics" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frfasioli%2Frust_basics", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frfasioli%2Frust_basics'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0bbddecc5b99eca277939780ada1bf9f586f12b0
[INFO] checking rfasioli/rust_basics/0bbddecc5b99eca277939780ada1bf9f586f12b0 against master#8321f00bf4a5f25cad5ec8861c5469afe6e0ce8b for pr-133925
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frfasioli%2Frust_basics" "/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/rfasioli/rust_basics on toolchain 8321f00bf4a5f25cad5ec8861c5469afe6e0ce8b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8321f00bf4a5f25cad5ec8861c5469afe6e0ce8b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rfasioli/rust_basics
[INFO] finished tweaking git repo https://github.com/rfasioli/rust_basics
[INFO] tweaked toml for git repo https://github.com/rfasioli/rust_basics written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/rfasioli/rust_basics 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" "+8321f00bf4a5f25cad5ec8861c5469afe6e0ce8b" "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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+8321f00bf4a5f25cad5ec8861c5469afe6e0ce8b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f592b005538e2e85abccdead11b71aa5b21ae72f075e8f5a1288c61344751255
[INFO] running `Command { std: "docker" "start" "-a" "f592b005538e2e85abccdead11b71aa5b21ae72f075e8f5a1288c61344751255", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f592b005538e2e85abccdead11b71aa5b21ae72f075e8f5a1288c61344751255", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f592b005538e2e85abccdead11b71aa5b21ae72f075e8f5a1288c61344751255", kill_on_drop: false }`
[INFO] [stdout] f592b005538e2e85abccdead11b71aa5b21ae72f075e8f5a1288c61344751255
[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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+8321f00bf4a5f25cad5ec8861c5469afe6e0ce8b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c95f4f17bb71cf208475dcb4e7586cfe09a703c99c8007ca493deb2bc51f2db
[INFO] running `Command { std: "docker" "start" "-a" "1c95f4f17bb71cf208475dcb4e7586cfe09a703c99c8007ca493deb2bc51f2db", kill_on_drop: false }`
[INFO] [stderr]     Checking TutorialsPoint v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: path statement with no effect
[INFO] [stdout]    --> src/main.rs:301:5
[INFO] [stdout]     |
[INFO] [stdout] 301 |     ref_var; // no-op, but counts as a use and keeps the borrow active
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(path_statements)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: path statement with no effect
[INFO] [stdout]    --> src/main.rs:313:5
[INFO] [stdout]     |
[INFO] [stdout] 313 |     ref_var2; // no-op, but counts as a use and keeps the borrow active until here
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: path statement with no effect
[INFO] [stdout]    --> src/main.rs:301:5
[INFO] [stdout]     |
[INFO] [stdout] 301 |     ref_var; // no-op, but counts as a use and keeps the borrow active
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(path_statements)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: path statement with no effect
[INFO] [stdout]    --> src/main.rs:313:5
[INFO] [stdout]     |
[INFO] [stdout] 313 |     ref_var2; // no-op, but counts as a use and keeps the borrow active until here
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "1c95f4f17bb71cf208475dcb4e7586cfe09a703c99c8007ca493deb2bc51f2db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c95f4f17bb71cf208475dcb4e7586cfe09a703c99c8007ca493deb2bc51f2db", kill_on_drop: false }`
[INFO] [stdout] 1c95f4f17bb71cf208475dcb4e7586cfe09a703c99c8007ca493deb2bc51f2db