[INFO] fetching crate serde_json 1.0.51...
[INFO] checking serde_json-1.0.51 against master#ba72b15666b2491415aec703a02c2364fe5e2790 for pr-71140
[INFO] extracting crate serde_json 1.0.51 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate serde_json 1.0.51 on toolchain ba72b15666b2491415aec703a02c2364fe5e2790
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba72b15666b2491415aec703a02c2364fe5e2790" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate serde_json 1.0.51
[INFO] finished tweaking crates.io crate serde_json 1.0.51
[INFO] tweaked toml for crates.io crate serde_json 1.0.51 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba72b15666b2491415aec703a02c2364fe5e2790" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba72b15666b2491415aec703a02c2364fe5e2790" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+ba72b15666b2491415aec703a02c2364fe5e2790" "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] 665e0b2d2e66a31555c855749d29b2be4d4a6bdf3f4d138f26efa1a6d03eef51
[INFO] running `"docker" "start" "-a" "665e0b2d2e66a31555c855749d29b2be4d4a6bdf3f4d138f26efa1a6d03eef51"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking dissimilar v1.0.1
[INFO] [stderr]    Compiling rustversion v1.0.2
[INFO] [stderr]    Compiling automod v0.1.2
[INFO] [stderr]     Checking serde_bytes v0.11.3
[INFO] [stderr]     Checking serde_stacker v0.1.1
[INFO] [stderr]     Checking serde_json v1.0.51 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking trybuild v1.0.25
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.26s
[INFO] running `"docker" "inspect" "665e0b2d2e66a31555c855749d29b2be4d4a6bdf3f4d138f26efa1a6d03eef51"`
[INFO] running `"docker" "rm" "-f" "665e0b2d2e66a31555c855749d29b2be4d4a6bdf3f4d138f26efa1a6d03eef51"`
[INFO] [stdout] 665e0b2d2e66a31555c855749d29b2be4d4a6bdf3f4d138f26efa1a6d03eef51