[INFO] fetching crate rust-netmap 0.0.7...
[INFO] checking rust-netmap-0.0.7 against beta for pr-78714
[INFO] extracting crate rust-netmap 0.0.7 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate rust-netmap 0.0.7 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 rust-netmap 0.0.7
[INFO] finished tweaking crates.io crate rust-netmap 0.0.7
[INFO] tweaked toml for crates.io crate rust-netmap 0.0.7 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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] 7a1ffd82d26d2a30ca181f0d79dd6053ed6aab4c1dd0b2230bea29665e48b143
[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" "7a1ffd82d26d2a30ca181f0d79dd6053ed6aab4c1dd0b2230bea29665e48b143", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7a1ffd82d26d2a30ca181f0d79dd6053ed6aab4c1dd0b2230bea29665e48b143", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a1ffd82d26d2a30ca181f0d79dd6053ed6aab4c1dd0b2230bea29665e48b143", kill_on_drop: false }`
[INFO] [stdout] 7a1ffd82d26d2a30ca181f0d79dd6053ed6aab4c1dd0b2230bea29665e48b143
[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] 777189a12b544fe24c9bf5d404860428f7e89e228471b231a6cb5e51914ce53e
[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" "777189a12b544fe24c9bf5d404860428f7e89e228471b231a6cb5e51914ce53e", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-netmap v0.0.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unknown lint: `unstable`
[INFO] [stdout]  --> build.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![allow(unstable)]
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unknown_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> build.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::old_io::Command;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `getenv` in module `os`
[INFO] [stdout]  --> build.rs:9:23
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let out_dir = os::getenv("OUT_DIR").unwrap();
[INFO] [stdout]   |                       ^^^^^^ not found in `os`
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]   |
[INFO] [stdout] 5 | use os::unix::process::sys::os::getenv;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `getenv` in module `os`
[INFO] [stdout]   --> build.rs:11:26
[INFO] [stdout]    |
[INFO] [stdout] 11 |     if let Some(_) = os::getenv("CARGO_FEATURE_NETMAP_WITH_LIBS") {
[INFO] [stdout]    |                          ^^^^^^ not found in `os`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]    |
[INFO] [stdout] 5  | use os::unix::process::sys::os::getenv;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> build.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(old_io, os)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0432, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-netmap`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "777189a12b544fe24c9bf5d404860428f7e89e228471b231a6cb5e51914ce53e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "777189a12b544fe24c9bf5d404860428f7e89e228471b231a6cb5e51914ce53e", kill_on_drop: false }`
[INFO] [stdout] 777189a12b544fe24c9bf5d404860428f7e89e228471b231a6cb5e51914ce53e