[INFO] cloning repository https://github.com/wangjun861205/my_proc_macro
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wangjun861205/my_proc_macro" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwangjun861205%2Fmy_proc_macro", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwangjun861205%2Fmy_proc_macro'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c5f4cbb48a2cc4e7d1c68d3f31437a74345488b6
[INFO] checking wangjun861205/my_proc_macro against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwangjun861205%2Fmy_proc_macro" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wangjun861205/my_proc_macro on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wangjun861205/my_proc_macro
[INFO] finished tweaking git repo https://github.com/wangjun861205/my_proc_macro
[INFO] tweaked toml for git repo https://github.com/wangjun861205/my_proc_macro written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/wangjun861205/my_proc_macro 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7c3f80c02ade95a3b81b9683f319262af873095f7a704db4c828c2f77a067561
[INFO] running `Command { std: "docker" "start" "-a" "7c3f80c02ade95a3b81b9683f319262af873095f7a704db4c828c2f77a067561", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c3f80c02ade95a3b81b9683f319262af873095f7a704db4c828c2f77a067561", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c3f80c02ade95a3b81b9683f319262af873095f7a704db4c828c2f77a067561", kill_on_drop: false }`
[INFO] [stdout] 7c3f80c02ade95a3b81b9683f319262af873095f7a704db4c828c2f77a067561
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2cd9396fa1d4cfd44bf475205db3ee75a2b0f6729628d9413b6d084b02e0dc82
[INFO] running `Command { std: "docker" "start" "-a" "2cd9396fa1d4cfd44bf475205db3ee75a2b0f6729628d9413b6d084b02e0dc82", kill_on_drop: false }`
[INFO] [stderr]    Compiling my_proc_macro v0.1.0 (/opt/rustwide/workdir/my_proc_macro)
[INFO] [stderr]     Checking proc_macro v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]  --> tests/flatten_zip.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let result = 2 + 2;
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` 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 0.18s
[INFO] running `Command { std: "docker" "inspect" "2cd9396fa1d4cfd44bf475205db3ee75a2b0f6729628d9413b6d084b02e0dc82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2cd9396fa1d4cfd44bf475205db3ee75a2b0f6729628d9413b6d084b02e0dc82", kill_on_drop: false }`
[INFO] [stdout] 2cd9396fa1d4cfd44bf475205db3ee75a2b0f6729628d9413b6d084b02e0dc82