[INFO] crate rust-netmap 0.0.7 is already in cache
[INFO] extracting crate rust-netmap 0.0.7 into work/ex/beta-1.38-1/sources/1.37.0/reg/rust-netmap/0.0.7
[INFO] extracting crate rust-netmap 0.0.7 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rust-netmap/0.0.7
[INFO] validating manifest of rust-netmap-0.0.7 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rust-netmap-0.0.7 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rust-netmap-0.0.7
[INFO] finished frobbing rust-netmap-0.0.7
[INFO] frobbed toml for rust-netmap-0.0.7 written to work/ex/beta-1.38-1/sources/1.37.0/reg/rust-netmap/0.0.7/Cargo.toml
[INFO] started frobbing rust-netmap-0.0.7
[INFO] finished frobbing rust-netmap-0.0.7
[INFO] frobbed toml for rust-netmap-0.0.7 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rust-netmap/0.0.7/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing rust-netmap-0.0.7 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rust-netmap/0.0.7:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] fa872d89ce66e6e26cc4d2b93de9e8a86e46673ef10f798ccb903ff670c00f85
[INFO] running `"docker" "start" "-a" "fa872d89ce66e6e26cc4d2b93de9e8a86e46673ef10f798ccb903ff670c00f85"`
[INFO] [stderr]    Compiling rust-netmap v0.0.7 (/opt/crater/workdir)
[INFO] [stderr] warning: unknown lint: `unstable`
[INFO] [stderr]  --> build.rs:4:10
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![allow(unstable)]
[INFO] [stderr]   |          ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unknown_lints)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::old_io`
[INFO] [stderr]  --> build.rs:5:10
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::old_io::Command;
[INFO] [stderr]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `getenv` in module `os`
[INFO] [stderr]  --> build.rs:9:23
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let out_dir = os::getenv("OUT_DIR").unwrap();
[INFO] [stderr]   |                       ^^^^^^ not found in `os`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `getenv` in module `os`
[INFO] [stderr]   --> build.rs:11:26
[INFO] [stderr]    |
[INFO] [stderr] 11 |     if let Some(_) = os::getenv("CARGO_FEATURE_NETMAP_WITH_LIBS") {
[INFO] [stderr]    |                          ^^^^^^ not found in `os`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> build.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(old_io, os)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0425, E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `rust-netmap`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "fa872d89ce66e6e26cc4d2b93de9e8a86e46673ef10f798ccb903ff670c00f85"`
[INFO] running `"docker" "rm" "-f" "fa872d89ce66e6e26cc4d2b93de9e8a86e46673ef10f798ccb903ff670c00f85"`
[INFO] [stdout] fa872d89ce66e6e26cc4d2b93de9e8a86e46673ef10f798ccb903ff670c00f85