[INFO] fetching crate mini-v8 0.3.0...
[INFO] checking mini-v8-0.3.0 against beta for pr-78714
[INFO] extracting crate mini-v8 0.3.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate mini-v8 0.3.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mini-v8 0.3.0
[INFO] finished tweaking crates.io crate mini-v8 0.3.0
[INFO] tweaked toml for crates.io crate mini-v8 0.3.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate mini-v8 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7a67497d5ec08862cbde4c54dc5a2243fa5845b2191a4e5ea1e11fe9d7f8b011
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7a67497d5ec08862cbde4c54dc5a2243fa5845b2191a4e5ea1e11fe9d7f8b011", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7a67497d5ec08862cbde4c54dc5a2243fa5845b2191a4e5ea1e11fe9d7f8b011", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a67497d5ec08862cbde4c54dc5a2243fa5845b2191a4e5ea1e11fe9d7f8b011", kill_on_drop: false }`
[INFO] [stdout] 7a67497d5ec08862cbde4c54dc5a2243fa5845b2191a4e5ea1e11fe9d7f8b011
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] be2758dd8fb93e04749bf7e5ca7e35b7a3e1ba4565f329f33ceb13e9dd390be7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "be2758dd8fb93e04749bf7e5ca7e35b7a3e1ba4565f329f33ceb13e9dd390be7", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.57
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking rustyline v5.0.6
[INFO] [stderr]    Compiling mini-v8 v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: environment variable `V8_PATH` not defined
[INFO] [stdout]  --> build.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let v8 = env!("V8_PATH");
[INFO] [stdout]   |              ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mini-v8`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "be2758dd8fb93e04749bf7e5ca7e35b7a3e1ba4565f329f33ceb13e9dd390be7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be2758dd8fb93e04749bf7e5ca7e35b7a3e1ba4565f329f33ceb13e9dd390be7", kill_on_drop: false }`
[INFO] [stdout] be2758dd8fb93e04749bf7e5ca7e35b7a3e1ba4565f329f33ceb13e9dd390be7