[INFO] crate mini-v8 0.2.1 is already in cache
[INFO] testing mini-v8-0.2.1 against 1.45.2 for beta-1.46-1
[INFO] extracting crate mini-v8 0.2.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate mini-v8 0.2.1 on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mini-v8 0.2.1
[INFO] finished tweaking crates.io crate mini-v8 0.2.1
[INFO] tweaked toml for crates.io crate mini-v8 0.2.1 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate crates.io crate mini-v8 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b8dcf7690e7bf2a4716d92aee666b3afe85c419440f38e574fb3baaa3e59af7d
[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" "b8dcf7690e7bf2a4716d92aee666b3afe85c419440f38e574fb3baaa3e59af7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b8dcf7690e7bf2a4716d92aee666b3afe85c419440f38e574fb3baaa3e59af7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8dcf7690e7bf2a4716d92aee666b3afe85c419440f38e574fb3baaa3e59af7d", kill_on_drop: false }`
[INFO] [stdout] b8dcf7690e7bf2a4716d92aee666b3afe85c419440f38e574fb3baaa3e59af7d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=warn" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] de20e98c5fe30b7c6399f0cd1cdf53725870352791f53a8e28d22e2f9e2ac81b
[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" "de20e98c5fe30b7c6399f0cd1cdf53725870352791f53a8e28d22e2f9e2ac81b", kill_on_drop: false }`
[INFO] [stderr]    Compiling mini-v8 v0.2.1 (/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] running `Command { std: "docker" "inspect" "de20e98c5fe30b7c6399f0cd1cdf53725870352791f53a8e28d22e2f9e2ac81b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de20e98c5fe30b7c6399f0cd1cdf53725870352791f53a8e28d22e2f9e2ac81b", kill_on_drop: false }`
[INFO] [stdout] de20e98c5fe30b7c6399f0cd1cdf53725870352791f53a8e28d22e2f9e2ac81b