[INFO] updating cached repository https://github.com/wezm/serde-duplicate-field
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6cd23ec38321f71c5dcecceb7c52c1daf82da5c1
[INFO] checking wezm/serde-duplicate-field against master#fdc0011561c6365c596dfd8fa1ef388162bc89c7 for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwezm%2Fserde-duplicate-field" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wezm/serde-duplicate-field on toolchain fdc0011561c6365c596dfd8fa1ef388162bc89c7
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/wezm/serde-duplicate-field
[INFO] finished tweaking git repo https://github.com/wezm/serde-duplicate-field
[INFO] tweaked toml for git repo https://github.com/wezm/serde-duplicate-field written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/wezm/serde-duplicate-field already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2a2071ef22ec77dff81c226fc5db8f8e725160db4a93141478b5f874d48034d8
[INFO] running `"docker" "start" "-a" "2a2071ef22ec77dff81c226fc5db8f8e725160db4a93141478b5f874d48034d8"`
[INFO] [stderr]     Checking serde v1.0.36
[INFO] [stderr]     Checking num-traits v0.2.2
[INFO] [stderr]     Checking itoa v0.4.1
[INFO] [stderr]    Compiling proc-macro2 v0.2.3
[INFO] [stderr]    Compiling quote v0.4.2
[INFO] [stderr]    Compiling syn v0.12.15
[INFO] [stderr]    Compiling serde_derive_internals v0.22.2
[INFO] [stderr]    Compiling serde_derive v1.0.36
[INFO] [stderr]     Checking serde_json v1.0.13
[INFO] [stderr]     Checking serde-duplicate-field v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.26s
[INFO] running `"docker" "inspect" "2a2071ef22ec77dff81c226fc5db8f8e725160db4a93141478b5f874d48034d8"`
[INFO] running `"docker" "rm" "-f" "2a2071ef22ec77dff81c226fc5db8f8e725160db4a93141478b5f874d48034d8"`
[INFO] [stdout] 2a2071ef22ec77dff81c226fc5db8f8e725160db4a93141478b5f874d48034d8