[INFO] fetching crate from_variants 0.5.0...
[INFO] checking from_variants-0.5.0 against try#9c1dcf141bc0875407c4eb36972857bd3db713e2 for pr-81863
[INFO] extracting crate from_variants 0.5.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate from_variants 0.5.0 on toolchain 9c1dcf141bc0875407c4eb36972857bd3db713e2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate from_variants 0.5.0
[INFO] finished tweaking crates.io crate from_variants 0.5.0
[INFO] tweaked toml for crates.io crate from_variants 0.5.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate from_variants 0.5.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ident_case v1.0.0
[INFO] [stderr]   Downloaded syn v1.0.35
[INFO] [stderr]   Downloaded from_variants_impl v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4cb84b654379019a41dfa49d2a27d0e8b904a6e3e0780d430965d3a7ecc079ff
[INFO] running `Command { std: "docker" "start" "-a" "4cb84b654379019a41dfa49d2a27d0e8b904a6e3e0780d430965d3a7ecc079ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4cb84b654379019a41dfa49d2a27d0e8b904a6e3e0780d430965d3a7ecc079ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4cb84b654379019a41dfa49d2a27d0e8b904a6e3e0780d430965d3a7ecc079ff", kill_on_drop: false }`
[INFO] [stdout] 4cb84b654379019a41dfa49d2a27d0e8b904a6e3e0780d430965d3a7ecc079ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 03c9716d9e1352b3c31065af3218f5c7aabb1d600b17b2c54459cb758f54634e
[INFO] running `Command { std: "docker" "start" "-a" "03c9716d9e1352b3c31065af3218f5c7aabb1d600b17b2c54459cb758f54634e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.35
[INFO] [stderr]    Compiling ident_case v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling from_variants_impl v0.5.0
[INFO] [stderr]     Checking from_variants v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.83s
[INFO] running `Command { std: "docker" "inspect" "03c9716d9e1352b3c31065af3218f5c7aabb1d600b17b2c54459cb758f54634e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03c9716d9e1352b3c31065af3218f5c7aabb1d600b17b2c54459cb758f54634e", kill_on_drop: false }`
[INFO] [stdout] 03c9716d9e1352b3c31065af3218f5c7aabb1d600b17b2c54459cb758f54634e