[INFO] updating cached repository https://github.com/basheersubei/rust-web-client
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2094ffbb033354a111518f6f6fa713f00cb7e930
[INFO] testing basheersubei/rust-web-client against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbasheersubei%2Frust-web-client" "work/builds/worker-9/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/basheersubei/rust-web-client on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/basheersubei/rust-web-client
[INFO] finished tweaking git repo https://github.com/basheersubei/rust-web-client
[INFO] tweaked toml for git repo https://github.com/basheersubei/rust-web-client written to work/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/basheersubei/rust-web-client already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] eab2a27a565e8cb3aec5731bb1df2f1378e4a074a86d81ecad83f05cb4267075
[INFO] running `"docker" "start" "-a" "eab2a27a565e8cb3aec5731bb1df2f1378e4a074a86d81ecad83f05cb4267075"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust_web_client v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0425]: cannot find function `lookup_host` in module `net`
[INFO] [stderr]   --> src/main.rs:54:30
[INFO] [stderr]    |
[INFO] [stderr] 54 |     let mut sock_addr = net::lookup_host(domain_name).expect("Failed to perform dns lookup").nth(0).unwrap();
[INFO] [stderr]    |                              ^^^^^^^^^^^ not found in `net`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(lookup_host)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0425, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `rust_web_client`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "eab2a27a565e8cb3aec5731bb1df2f1378e4a074a86d81ecad83f05cb4267075"`
[INFO] running `"docker" "rm" "-f" "eab2a27a565e8cb3aec5731bb1df2f1378e4a074a86d81ecad83f05cb4267075"`
[INFO] [stdout] eab2a27a565e8cb3aec5731bb1df2f1378e4a074a86d81ecad83f05cb4267075