[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#2a023bf80a6fbd6a06d5460a34eb247b986286ed for pr-143764
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwangjun861205%2Fmy_proc_macro" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[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-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/wangjun861205/my_proc_macro on toolchain 2a023bf80a6fbd6a06d5460a34eb247b986286ed
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2a023bf80a6fbd6a06d5460a34eb247b986286ed" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+2a023bf80a6fbd6a06d5460a34eb247b986286ed" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+2a023bf80a6fbd6a06d5460a34eb247b986286ed" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 050cf15240e72a165f5e5493eb7e3fdec921bfd19c827174bfd81016cbbc5433
[INFO] running `Command { std: "docker" "start" "-a" "050cf15240e72a165f5e5493eb7e3fdec921bfd19c827174bfd81016cbbc5433", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "050cf15240e72a165f5e5493eb7e3fdec921bfd19c827174bfd81016cbbc5433", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "050cf15240e72a165f5e5493eb7e3fdec921bfd19c827174bfd81016cbbc5433", kill_on_drop: false }`
[INFO] [stdout] 050cf15240e72a165f5e5493eb7e3fdec921bfd19c827174bfd81016cbbc5433
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+2a023bf80a6fbd6a06d5460a34eb247b986286ed" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d4480d6e157d0d95e6a88b6b49b75ab74ee12fc241adfffae0b2764bc5da8460
[INFO] running `Command { std: "docker" "start" "-a" "d4480d6e157d0d95e6a88b6b49b75ab74ee12fc241adfffae0b2764bc5da8460", 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "d4480d6e157d0d95e6a88b6b49b75ab74ee12fc241adfffae0b2764bc5da8460", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4480d6e157d0d95e6a88b6b49b75ab74ee12fc241adfffae0b2764bc5da8460", kill_on_drop: false }`
[INFO] [stdout] d4480d6e157d0d95e6a88b6b49b75ab74ee12fc241adfffae0b2764bc5da8460