[INFO] updating cached repository gchp/tcp-test [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/gchp/tcp-test [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/gchp/tcp-test" "work/ex/beta-1.38-1/sources/1.37.0/gh/gchp/tcp-test"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/gchp/tcp-test'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/gchp/tcp-test" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gchp/tcp-test"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gchp/tcp-test'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] e612576dede748e0778ad1acdd9b7be46c0e3cdb [INFO] sha for GitHub repo gchp/tcp-test: e612576dede748e0778ad1acdd9b7be46c0e3cdb [INFO] validating manifest of gchp/tcp-test 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 gchp/tcp-test 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 gchp/tcp-test [INFO] finished frobbing gchp/tcp-test [INFO] frobbed toml for gchp/tcp-test written to work/ex/beta-1.38-1/sources/1.37.0/gh/gchp/tcp-test/Cargo.toml [INFO] started frobbing gchp/tcp-test [INFO] finished frobbing gchp/tcp-test [INFO] frobbed toml for gchp/tcp-test written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gchp/tcp-test/Cargo.toml [INFO] crate gchp/tcp-test already has a lockfile, it will not be regenerated [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 gchp/tcp-test against 1.37.0 for beta-1.38-1 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/gchp/tcp-test:/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" "+1.37.0" "build" "--frozen"` [INFO] [stdout] 21f067e02974959528f091e7662da32e2a4511601b4fb4a813083d37b69c64be [INFO] running `"docker" "start" "-a" "21f067e02974959528f091e7662da32e2a4511601b4fb4a813083d37b69c64be"` [INFO] [stderr] Compiling tcp-test v0.1.0 (/opt/crater/workdir) [INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel [INFO] [stderr] --> src/bin/server.rs:1:1 [INFO] [stderr] | [INFO] [stderr] 1 | #![feature(collections)] [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `Shutdown` [INFO] [stderr] --> src/bin/server.rs:3:40 [INFO] [stderr] | [INFO] [stderr] 3 | use std::net::{TcpListener, TcpStream, Shutdown}; [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_imports)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused import: `std::io` [INFO] [stderr] --> src/bin/client.rs:2:5 [INFO] [stderr] | [INFO] [stderr] 2 | use std::io; [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_imports)] on by default [INFO] [stderr] [INFO] [stderr] error[E0599]: no method named `push_all` found for type `std::vec::Vec<_>` in the current scope [INFO] [stderr] --> src/bin/server.rs:16:17 [INFO] [stderr] | [INFO] [stderr] 16 | return_data.push_all(&*raw); [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] warning: unused variable: `data` [INFO] [stderr] --> src/bin/client.rs:21:9 [INFO] [stderr] | [INFO] [stderr] 21 | let data = stream.read_to_string(&mut response); [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_data` [INFO] [stderr] [INFO] [stderr] error[E0599]: no method named `push_all` found for type `std::vec::Vec<_>` in the current scope [INFO] [stderr] --> src/bin/server.rs:17:17 [INFO] [stderr] | [INFO] [stderr] 17 | return_data.push_all(&*data); [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/bin/client.rs:16:9 [INFO] [stderr] | [INFO] [stderr] 16 | let mut d =args().last().unwrap(); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_mut)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/bin/client.rs:10:5 [INFO] [stderr] | [INFO] [stderr] 10 | stream.shutdown(Shutdown::Write); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_must_use)] on by default [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/bin/client.rs:22:5 [INFO] [stderr] | [INFO] [stderr] 22 | stream.shutdown(Shutdown::Both); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] error: aborting due to 3 previous errors [INFO] [stderr] [INFO] [stderr] Some errors have detailed explanations: E0554, E0599. [INFO] [stderr] For more information about an error, try `rustc --explain E0554`. [INFO] [stderr] error: Could not compile `tcp-test`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: build failed [INFO] running `"docker" "inspect" "21f067e02974959528f091e7662da32e2a4511601b4fb4a813083d37b69c64be"` [INFO] running `"docker" "rm" "-f" "21f067e02974959528f091e7662da32e2a4511601b4fb4a813083d37b69c64be"` [INFO] [stdout] 21f067e02974959528f091e7662da32e2a4511601b4fb4a813083d37b69c64be