[INFO] crate linux_tuples_client 0.1.1 is already in cache
[INFO] extracting crate linux_tuples_client 0.1.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/linux_tuples_client/0.1.1
[INFO] extracting crate linux_tuples_client 0.1.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/linux_tuples_client/0.1.1
[INFO] validating manifest of linux_tuples_client-0.1.1 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 linux_tuples_client-0.1.1 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 linux_tuples_client-0.1.1
[INFO] finished frobbing linux_tuples_client-0.1.1
[INFO] frobbed toml for linux_tuples_client-0.1.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/linux_tuples_client/0.1.1/Cargo.toml
[INFO] started frobbing linux_tuples_client-0.1.1
[INFO] finished frobbing linux_tuples_client-0.1.1
[INFO] frobbed toml for linux_tuples_client-0.1.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/linux_tuples_client/0.1.1/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 linux_tuples_client-0.1.1 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/linux_tuples_client/0.1.1:/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] 166b99d30f8436dd6a152b6ec436dd56c7575961f8598f15f9f97d428780d5f5
[INFO] running `"docker" "start" "-a" "166b99d30f8436dd6a152b6ec436dd56c7575961f8598f15f9f97d428780d5f5"`
[INFO] [stderr]    Compiling linux_tuples_client v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: type `str_desc` should have an upper camel case name
[INFO] [stderr]    --> src/lib.rs:187:9
[INFO] [stderr]     |
[INFO] [stderr] 187 |     struct str_desc {
[INFO] [stderr]     |            ^^^^^^^^ help: convert the identifier to upper camel case: `StrDesc`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buff_8`
[INFO] [stderr]    --> src/lib.rs:197:10
[INFO] [stderr]     |
[INFO] [stderr] 197 |     let mut buff_8:[u8; 8] = [0; 8];
[INFO] [stderr]     |             ^^^^^^ help: consider prefixing with an underscore: `_buff_8`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:211:6
[INFO] [stderr]     |
[INFO] [stderr] 211 |     for i in 0..num_elements {
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str_slice`
[INFO] [stderr]    --> src/lib.rs:251:11
[INFO] [stderr]     |
[INFO] [stderr] 251 |         let mut str_slice = string_space.as_slice();
[INFO] [stderr]     |                 ^^^^^^^^^ help: consider prefixing with an underscore: `_str_slice`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:449:9
[INFO] [stderr]     |
[INFO] [stderr] 449 |                 for i in 0..recv_count {
[INFO] [stderr]     |                     ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:197:6
[INFO] [stderr]     |
[INFO] [stderr] 197 |     let mut buff_8:[u8; 8] = [0; 8];
[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: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:251:7
[INFO] [stderr]     |
[INFO] [stderr] 251 |         let mut str_slice = string_space.as_slice();
[INFO] [stderr]     |             ----^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:279:10
[INFO] [stderr]     |
[INFO] [stderr] 279 |         let mut stream_err = TcpStream::connect(&self.connection);
[INFO] [stderr]     |             ----^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:306:7
[INFO] [stderr]     |
[INFO] [stderr] 306 |         let mut stream_err = TcpStream::connect(&self.connection);
[INFO] [stderr]     |             ----^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:335:7
[INFO] [stderr]     |
[INFO] [stderr] 335 |         let mut stream_err = TcpStream::connect(&self.connection);
[INFO] [stderr]     |             ----^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:366:7
[INFO] [stderr]     |
[INFO] [stderr] 366 |         let mut stream_err = TcpStream::connect(&self.connection);
[INFO] [stderr]     |             ----^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:398:7
[INFO] [stderr]     |
[INFO] [stderr] 398 |         let mut stream_err = TcpStream::connect(&self.connection);
[INFO] [stderr]     |             ----^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:430:7
[INFO] [stderr]     |
[INFO] [stderr] 430 |         let mut stream_err = TcpStream::connect(&self.connection);
[INFO] [stderr]     |             ----^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:475:7
[INFO] [stderr]     |
[INFO] [stderr] 475 |         let mut stream_err = TcpStream::connect(&self.connection);
[INFO] [stderr]     |             ----^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:513:8
[INFO] [stderr]     |
[INFO] [stderr] 513 |             let mut stream_err = TcpStream::connect(&self.connection);
[INFO] [stderr]     |                 ----^^^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:546:7
[INFO] [stderr]     |
[INFO] [stderr] 546 |         let mut stream_err = TcpStream::connect(&self.connection);
[INFO] [stderr]     |             ----^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:112:5
[INFO] [stderr]     |
[INFO] [stderr] 112 |     stream.write_all(& (ti(tuple.len() as i32)));
[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/lib.rs:123:5
[INFO] [stderr]     |
[INFO] [stderr] 123 |     stream.write_all(&ti(string_length));
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:137:9
[INFO] [stderr]     |
[INFO] [stderr] 137 |                     stream.write_all(&buff); 
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:144:9
[INFO] [stderr]     |
[INFO] [stderr] 144 |                     stream.write_all(&buff);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:156:9
[INFO] [stderr]     |
[INFO] [stderr] 156 |                     stream.write_all(&buff);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:163:8
[INFO] [stderr]     |
[INFO] [stderr] 163 |                 stream.write_all(&mut buff);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:170:8
[INFO] [stderr]     |
[INFO] [stderr] 170 |                 stream.write_all(&buff);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:178:8
[INFO] [stderr]     |
[INFO] [stderr] 178 |                 stream.write_all(s.as_bytes());
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:200:2
[INFO] [stderr]     |
[INFO] [stderr] 200 |     stream.read_exact(&mut buff_4);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:208:2
[INFO] [stderr]     |
[INFO] [stderr] 208 |     stream.read_exact(&mut buff_4);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:213:3
[INFO] [stderr]     |
[INFO] [stderr] 213 |         stream.read_exact(&mut buff);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:249:3
[INFO] [stderr]     |
[INFO] [stderr] 249 |         stream.read_exact(&mut string_space);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:282:8
[INFO] [stderr]     |
[INFO] [stderr] 282 |                 stream.write_all(&ti(PUT));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:284:5
[INFO] [stderr]     |
[INFO] [stderr] 284 |                 stream.shutdown(Shutdown::Write);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:309:5
[INFO] [stderr]     |
[INFO] [stderr] 309 |                 stream.write_all(&ti(GET));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:313:5
[INFO] [stderr]     |
[INFO] [stderr] 313 |                 stream.shutdown(Shutdown::Write);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:338:5
[INFO] [stderr]     |
[INFO] [stderr] 338 |                 stream.write_all(&ti(READ));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:342:5
[INFO] [stderr]     |
[INFO] [stderr] 342 |                 stream.shutdown(Shutdown::Write);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:369:5
[INFO] [stderr]     |
[INFO] [stderr] 369 |                 stream.write_all(&ti(GET_NB));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:373:5
[INFO] [stderr]     |
[INFO] [stderr] 373 |                 stream.shutdown(Shutdown::Write);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:401:5
[INFO] [stderr]     |
[INFO] [stderr] 401 |                 stream.write_all(&ti(READ_NB));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:405:5
[INFO] [stderr]     |
[INFO] [stderr] 405 |                 stream.shutdown(Shutdown::Write);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:433:5
[INFO] [stderr]     |
[INFO] [stderr] 433 |                 stream.write_all(&ti(DUMP));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:435:5
[INFO] [stderr]     |
[INFO] [stderr] 435 |                 stream.write_all(&ti(count));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:443:5
[INFO] [stderr]     |
[INFO] [stderr] 443 |                 stream.read_exact(&mut buff_4);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:478:5
[INFO] [stderr]     |
[INFO] [stderr] 478 |                 stream.write_all(&ti(COUNT));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:480:5
[INFO] [stderr]     |
[INFO] [stderr] 480 |                 stream.write_all(&ti(count));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:488:5
[INFO] [stderr]     |
[INFO] [stderr] 488 |                 stream.read_exact(&mut buff_4);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:516:6
[INFO] [stderr]     |
[INFO] [stderr] 516 |                     stream.write_all(&ti(REPLACE));
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:520:6
[INFO] [stderr]     |
[INFO] [stderr] 520 |                     stream.read_exact(&mut buff_4);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:549:5
[INFO] [stderr]     |
[INFO] [stderr] 549 |                 stream.write_all(&ti(LOG));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:551:5
[INFO] [stderr]     |
[INFO] [stderr] 551 |                 stream.read_to_string(&mut log);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `"docker" "inspect" "166b99d30f8436dd6a152b6ec436dd56c7575961f8598f15f9f97d428780d5f5"`
[INFO] running `"docker" "rm" "-f" "166b99d30f8436dd6a152b6ec436dd56c7575961f8598f15f9f97d428780d5f5"`
[INFO] [stdout] 166b99d30f8436dd6a152b6ec436dd56c7575961f8598f15f9f97d428780d5f5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/linux_tuples_client/0.1.1:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] 1df85d06ebfb0c1614f67eae7413b1a750cb792de109573ef8f41e82f1afb50c
[INFO] running `"docker" "start" "-a" "1df85d06ebfb0c1614f67eae7413b1a750cb792de109573ef8f41e82f1afb50c"`
[INFO] [stderr]    Compiling linux_tuples_client v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: type `str_desc` should have an upper camel case name
[INFO] [stderr]    --> src/lib.rs:187:9
[INFO] [stderr]     |
[INFO] [stderr] 187 |     struct str_desc {
[INFO] [stderr]     |            ^^^^^^^^ help: convert the identifier to upper camel case: `StrDesc`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buff_8`
[INFO] [stderr]    --> src/lib.rs:197:10
[INFO] [stderr]     |
[INFO] [stderr] 197 |     let mut buff_8:[u8; 8] = [0; 8];
[INFO] [stderr]     |             ^^^^^^ help: consider prefixing with an underscore: `_buff_8`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:211:6
[INFO] [stderr]     |
[INFO] [stderr] 211 |     for i in 0..num_elements {
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str_slice`
[INFO] [stderr]    --> src/lib.rs:251:11
[INFO] [stderr]     |
[INFO] [stderr] 251 |         let mut str_slice = string_space.as_slice();
[INFO] [stderr]     |                 ^^^^^^^^^ help: consider prefixing with an underscore: `_str_slice`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:449:9
[INFO] [stderr]     |
[INFO] [stderr] 449 |                 for i in 0..recv_count {
[INFO] [stderr]     |                     ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:197:6
[INFO] [stderr]     |
[INFO] [stderr] 197 |     let mut buff_8:[u8; 8] = [0; 8];
[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: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:251:7
[INFO] [stderr]     |
[INFO] [stderr] 251 |         let mut str_slice = string_space.as_slice();
[INFO] [stderr]     |             ----^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:279:10
[INFO] [stderr]     |
[INFO] [stderr] 279 |         let mut stream_err = TcpStream::connect(&self.connection);
[INFO] [stderr]     |             ----^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:306:7
[INFO] [stderr]     |
[INFO] [stderr] 306 |         let mut stream_err = TcpStream::connect(&self.connection);
[INFO] [stderr]     |             ----^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:335:7
[INFO] [stderr]     |
[INFO] [stderr] 335 |         let mut stream_err = TcpStream::connect(&self.connection);
[INFO] [stderr]     |             ----^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:366:7
[INFO] [stderr]     |
[INFO] [stderr] 366 |         let mut stream_err = TcpStream::connect(&self.connection);
[INFO] [stderr]     |             ----^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:398:7
[INFO] [stderr]     |
[INFO] [stderr] 398 |         let mut stream_err = TcpStream::connect(&self.connection);
[INFO] [stderr]     |             ----^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:430:7
[INFO] [stderr]     |
[INFO] [stderr] 430 |         let mut stream_err = TcpStream::connect(&self.connection);
[INFO] [stderr]     |             ----^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:475:7
[INFO] [stderr]     |
[INFO] [stderr] 475 |         let mut stream_err = TcpStream::connect(&self.connection);
[INFO] [stderr]     |             ----^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:513:8
[INFO] [stderr]     |
[INFO] [stderr] 513 |             let mut stream_err = TcpStream::connect(&self.connection);
[INFO] [stderr]     |                 ----^^^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:546:7
[INFO] [stderr]     |
[INFO] [stderr] 546 |         let mut stream_err = TcpStream::connect(&self.connection);
[INFO] [stderr]     |             ----^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:112:5
[INFO] [stderr]     |
[INFO] [stderr] 112 |     stream.write_all(& (ti(tuple.len() as i32)));
[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/lib.rs:123:5
[INFO] [stderr]     |
[INFO] [stderr] 123 |     stream.write_all(&ti(string_length));
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:137:9
[INFO] [stderr]     |
[INFO] [stderr] 137 |                     stream.write_all(&buff); 
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:144:9
[INFO] [stderr]     |
[INFO] [stderr] 144 |                     stream.write_all(&buff);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:156:9
[INFO] [stderr]     |
[INFO] [stderr] 156 |                     stream.write_all(&buff);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:163:8
[INFO] [stderr]     |
[INFO] [stderr] 163 |                 stream.write_all(&mut buff);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:170:8
[INFO] [stderr]     |
[INFO] [stderr] 170 |                 stream.write_all(&buff);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:178:8
[INFO] [stderr]     |
[INFO] [stderr] 178 |                 stream.write_all(s.as_bytes());
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:200:2
[INFO] [stderr]     |
[INFO] [stderr] 200 |     stream.read_exact(&mut buff_4);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:208:2
[INFO] [stderr]     |
[INFO] [stderr] 208 |     stream.read_exact(&mut buff_4);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:213:3
[INFO] [stderr]     |
[INFO] [stderr] 213 |         stream.read_exact(&mut buff);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:249:3
[INFO] [stderr]     |
[INFO] [stderr] 249 |         stream.read_exact(&mut string_space);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:282:8
[INFO] [stderr]     |
[INFO] [stderr] 282 |                 stream.write_all(&ti(PUT));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:284:5
[INFO] [stderr]     |
[INFO] [stderr] 284 |                 stream.shutdown(Shutdown::Write);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:309:5
[INFO] [stderr]     |
[INFO] [stderr] 309 |                 stream.write_all(&ti(GET));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:313:5
[INFO] [stderr]     |
[INFO] [stderr] 313 |                 stream.shutdown(Shutdown::Write);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:338:5
[INFO] [stderr]     |
[INFO] [stderr] 338 |                 stream.write_all(&ti(READ));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:342:5
[INFO] [stderr]     |
[INFO] [stderr] 342 |                 stream.shutdown(Shutdown::Write);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:369:5
[INFO] [stderr]     |
[INFO] [stderr] 369 |                 stream.write_all(&ti(GET_NB));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:373:5
[INFO] [stderr]     |
[INFO] [stderr] 373 |                 stream.shutdown(Shutdown::Write);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:401:5
[INFO] [stderr]     |
[INFO] [stderr] 401 |                 stream.write_all(&ti(READ_NB));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:405:5
[INFO] [stderr]     |
[INFO] [stderr] 405 |                 stream.shutdown(Shutdown::Write);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:433:5
[INFO] [stderr]     |
[INFO] [stderr] 433 |                 stream.write_all(&ti(DUMP));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:435:5
[INFO] [stderr]     |
[INFO] [stderr] 435 |                 stream.write_all(&ti(count));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:443:5
[INFO] [stderr]     |
[INFO] [stderr] 443 |                 stream.read_exact(&mut buff_4);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:478:5
[INFO] [stderr]     |
[INFO] [stderr] 478 |                 stream.write_all(&ti(COUNT));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:480:5
[INFO] [stderr]     |
[INFO] [stderr] 480 |                 stream.write_all(&ti(count));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:488:5
[INFO] [stderr]     |
[INFO] [stderr] 488 |                 stream.read_exact(&mut buff_4);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:516:6
[INFO] [stderr]     |
[INFO] [stderr] 516 |                     stream.write_all(&ti(REPLACE));
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:520:6
[INFO] [stderr]     |
[INFO] [stderr] 520 |                     stream.read_exact(&mut buff_4);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:549:5
[INFO] [stderr]     |
[INFO] [stderr] 549 |                 stream.write_all(&ti(LOG));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[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/lib.rs:551:5
[INFO] [stderr]     |
[INFO] [stderr] 551 |                 stream.read_to_string(&mut log);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `"docker" "inspect" "1df85d06ebfb0c1614f67eae7413b1a750cb792de109573ef8f41e82f1afb50c"`
[INFO] running `"docker" "rm" "-f" "1df85d06ebfb0c1614f67eae7413b1a750cb792de109573ef8f41e82f1afb50c"`
[INFO] [stdout] 1df85d06ebfb0c1614f67eae7413b1a750cb792de109573ef8f41e82f1afb50c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/linux_tuples_client/0.1.1:/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" "test" "--frozen"`
[INFO] [stdout] 48c6ba122bbeb7ff6da5b3415ebe36d30eaaa4dcb1bcb4677afaece67bf9c603
[INFO] running `"docker" "start" "-a" "48c6ba122bbeb7ff6da5b3415ebe36d30eaaa4dcb1bcb4677afaece67bf9c603"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/linux_tuples_client-5ecf9db56a43dac0
[INFO] [stdout] running 0 tests
[INFO] [stderr]    Doc-tests linux_tuples_client
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test src/lib.rs - LinuxTuplesConnection::put_tuple (line 271) ... FAILED
[INFO] [stdout] test src/lib.rs - LinuxTuplesConnection::print_tuple (line 565) ... FAILED
[INFO] [stdout] test src/lib.rs - LinuxTuplesConnection::get_tuple (line 297) ... FAILED
[INFO] [stdout] test src/lib.rs - E::print (line 22) ... FAILED
[INFO] [stdout] test src/lib.rs - LinuxTuplesConnection (line 47) ... FAILED
[INFO] [stdout] test src/lib.rs - LinuxTuplesConnection::read_all_tuples (line 421) ... FAILED
[INFO] [stdout] test src/lib.rs - LinuxTuplesConnection::read_nb_tuple (line 389) ... FAILED
[INFO] [stdout] test src/lib.rs - LinuxTuplesConnection::number_of_tuples (line 466) ... FAILED
[INFO] [stdout] test src/lib.rs - LinuxTuplesConnection::get_nb_tuple (line 357) ... FAILED
[INFO] [stdout] test src/lib.rs - LinuxTuplesConnection::server_log (line 539) ... FAILED
[INFO] [stdout] test src/lib.rs - LinuxTuplesConnection::read_tuple (line 327) ... FAILED
[INFO] [stdout] test src/lib.rs - LinuxTuplesConnection::replace_tuple (line 505) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - LinuxTuplesConnection::put_tuple (line 271) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:272:22
[INFO] [stdout]   |
[INFO] [stdout] 3 | conn.put_tuple(&vec![E::I(123), E::S("123".to_string())]);
[INFO] [stdout]   |                      ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:272:33
[INFO] [stdout]   |
[INFO] [stdout] 3 | conn.put_tuple(&vec![E::I(123), E::S("123".to_string())]);
[INFO] [stdout]   |                                 ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `conn` in this scope
[INFO] [stdout]  --> src/lib.rs:272:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | conn.put_tuple(&vec![E::I(123), E::S("123".to_string())]);
[INFO] [stdout]   | ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - LinuxTuplesConnection::print_tuple (line 565) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `LinuxTuplesConnection`
[INFO] [stdout]  --> src/lib.rs:566:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | LinuxTuplesConnection::print_tuple(&vec![E::I(123)]);
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^ use of undeclared type or module `LinuxTuplesConnection`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:566:42
[INFO] [stdout]   |
[INFO] [stdout] 3 | LinuxTuplesConnection::print_tuple(&vec![E::I(123)]);
[INFO] [stdout]   |                                          ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - LinuxTuplesConnection::get_tuple (line 297) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:298:34
[INFO] [stdout]   |
[INFO] [stdout] 3 | let tuple = conn.get_tuple(&vec![E::I(123), E::None]).unwrap();
[INFO] [stdout]   |                                  ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:298:45
[INFO] [stdout]   |
[INFO] [stdout] 3 | let tuple = conn.get_tuple(&vec![E::I(123), E::None]).unwrap();
[INFO] [stdout]   |                                             ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `conn` in this scope
[INFO] [stdout]  --> src/lib.rs:298:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | let tuple = conn.get_tuple(&vec![E::I(123), E::None]).unwrap();
[INFO] [stdout]   |             ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - E::print (line 22) stdout ----
[INFO] [stdout] error[E0425]: cannot find value `e` in this scope
[INFO] [stdout]  --> src/lib.rs:23:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | e.print()
[INFO] [stdout]   | ^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - LinuxTuplesConnection (line 47) stdout ----
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `LinuxTuplesConnection` in this scope
[INFO] [stdout]  --> src/lib.rs:48:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | let conn = LinuxTuplesConnection { addr };
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `addr` in this scope
[INFO] [stdout]  --> src/lib.rs:48:36
[INFO] [stdout]   |
[INFO] [stdout] 3 | let conn = LinuxTuplesConnection { addr };
[INFO] [stdout]   |                                    ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0422, E0425.
[INFO] [stdout] For more information about an error, try `rustc --explain E0422`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - LinuxTuplesConnection::read_all_tuples (line 421) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:422:50
[INFO] [stdout]   |
[INFO] [stdout] 3 | let tuple_list = conn.read_all_tuples(&vec![vec![E::I(123), E::None], vec![E::S("123".to_string()), E::None]]).unwrap();
[INFO] [stdout]   |                                                  ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:422:61
[INFO] [stdout]   |
[INFO] [stdout] 3 | let tuple_list = conn.read_all_tuples(&vec![vec![E::I(123), E::None], vec![E::S("123".to_string()), E::None]]).unwrap();
[INFO] [stdout]   |                                                             ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:422:76
[INFO] [stdout]   |
[INFO] [stdout] 3 | let tuple_list = conn.read_all_tuples(&vec![vec![E::I(123), E::None], vec![E::S("123".to_string()), E::None]]).unwrap();
[INFO] [stdout]   |                                                                            ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:422:101
[INFO] [stdout]   |
[INFO] [stdout] 3 | let tuple_list = conn.read_all_tuples(&vec![vec![E::I(123), E::None], vec![E::S("123".to_string()), E::None]]).unwrap();
[INFO] [stdout]   |                                                                                                     ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `conn` in this scope
[INFO] [stdout]  --> src/lib.rs:422:18
[INFO] [stdout]   |
[INFO] [stdout] 3 | let tuple_list = conn.read_all_tuples(&vec![vec![E::I(123), E::None], vec![E::S("123".to_string()), E::None]]).unwrap();
[INFO] [stdout]   |                  ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - LinuxTuplesConnection::read_nb_tuple (line 389) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:390:38
[INFO] [stdout]   |
[INFO] [stdout] 3 | let tuple = conn.read_nb_tuple(&vec![E::I(123), E::S("123".to_string())]).unwrap();
[INFO] [stdout]   |                                      ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:390:49
[INFO] [stdout]   |
[INFO] [stdout] 3 | let tuple = conn.read_nb_tuple(&vec![E::I(123), E::S("123".to_string())]).unwrap();
[INFO] [stdout]   |                                                 ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `conn` in this scope
[INFO] [stdout]  --> src/lib.rs:390:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | let tuple = conn.read_nb_tuple(&vec![E::I(123), E::S("123".to_string())]).unwrap();
[INFO] [stdout]   |             ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - LinuxTuplesConnection::number_of_tuples (line 466) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:467:46
[INFO] [stdout]   |
[INFO] [stdout] 3 | let count = conn.number_of_tuples(&vec![vec![E::I(123), E::None], vec![E::S("123".to_string()), E::None]]).unwrap();
[INFO] [stdout]   |                                              ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:467:57
[INFO] [stdout]   |
[INFO] [stdout] 3 | let count = conn.number_of_tuples(&vec![vec![E::I(123), E::None], vec![E::S("123".to_string()), E::None]]).unwrap();
[INFO] [stdout]   |                                                         ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:467:72
[INFO] [stdout]   |
[INFO] [stdout] 3 | let count = conn.number_of_tuples(&vec![vec![E::I(123), E::None], vec![E::S("123".to_string()), E::None]]).unwrap();
[INFO] [stdout]   |                                                                        ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:467:97
[INFO] [stdout]   |
[INFO] [stdout] 3 | let count = conn.number_of_tuples(&vec![vec![E::I(123), E::None], vec![E::S("123".to_string()), E::None]]).unwrap();
[INFO] [stdout]   |                                                                                                 ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `conn` in this scope
[INFO] [stdout]  --> src/lib.rs:467:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | let count = conn.number_of_tuples(&vec![vec![E::I(123), E::None], vec![E::S("123".to_string()), E::None]]).unwrap();
[INFO] [stdout]   |             ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - LinuxTuplesConnection::get_nb_tuple (line 357) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:358:37
[INFO] [stdout]   |
[INFO] [stdout] 3 | let tuple = conn.get_nb_tuple(&vec![E::I(123), E::S("123".to_string())]).unwrap();
[INFO] [stdout]   |                                     ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:358:48
[INFO] [stdout]   |
[INFO] [stdout] 3 | let tuple = conn.get_nb_tuple(&vec![E::I(123), E::S("123".to_string())]).unwrap();
[INFO] [stdout]   |                                                ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `conn` in this scope
[INFO] [stdout]  --> src/lib.rs:358:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | let tuple = conn.get_nb_tuple(&vec![E::I(123), E::S("123".to_string())]).unwrap();
[INFO] [stdout]   |             ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - LinuxTuplesConnection::server_log (line 539) stdout ----
[INFO] [stdout] error[E0425]: cannot find value `conn` in this scope
[INFO] [stdout]  --> src/lib.rs:540:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | let log = conn.server_log();
[INFO] [stdout]   |           ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - LinuxTuplesConnection::read_tuple (line 327) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:328:35
[INFO] [stdout]   |
[INFO] [stdout] 3 | let tuple = conn.read_tuple(&vec![E::I(123), E::None]).unwrap();
[INFO] [stdout]   |                                   ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:328:46
[INFO] [stdout]   |
[INFO] [stdout] 3 | let tuple = conn.read_tuple(&vec![E::I(123), E::None]).unwrap();
[INFO] [stdout]   |                                              ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `conn` in this scope
[INFO] [stdout]  --> src/lib.rs:328:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | let tuple = conn.read_tuple(&vec![E::I(123), E::None]).unwrap();
[INFO] [stdout]   |             ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - LinuxTuplesConnection::replace_tuple (line 505) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:506:26
[INFO] [stdout]   |
[INFO] [stdout] 3 | conn.replace_tuple(&vec![E::I(123)], &vec![E::S("123".to_string())]).unwrap();
[INFO] [stdout]   |                          ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `E`
[INFO] [stdout]  --> src/lib.rs:506:44
[INFO] [stdout]   |
[INFO] [stdout] 3 | conn.replace_tuple(&vec![E::I(123)], &vec![E::S("123".to_string())]).unwrap();
[INFO] [stdout]   |                                            ^ use of undeclared type or module `E`
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `conn` in this scope
[INFO] [stdout]  --> src/lib.rs:506:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | conn.replace_tuple(&vec![E::I(123)], &vec![E::S("123".to_string())]).unwrap();
[INFO] [stdout]   | ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - E::print (line 22)
[INFO] [stdout]     src/lib.rs - LinuxTuplesConnection (line 47)
[INFO] [stdout]     src/lib.rs - LinuxTuplesConnection::get_nb_tuple (line 357)
[INFO] [stdout]     src/lib.rs - LinuxTuplesConnection::get_tuple (line 297)
[INFO] [stdout]     src/lib.rs - LinuxTuplesConnection::number_of_tuples (line 466)
[INFO] [stdout]     src/lib.rs - LinuxTuplesConnection::print_tuple (line 565)
[INFO] [stdout]     src/lib.rs - LinuxTuplesConnection::put_tuple (line 271)
[INFO] [stdout]     src/lib.rs - LinuxTuplesConnection::read_all_tuples (line 421)
[INFO] [stdout]     src/lib.rs - LinuxTuplesConnection::read_nb_tuple (line 389)
[INFO] [stdout]     src/lib.rs - LinuxTuplesConnection::read_tuple (line 327)
[INFO] [stdout]     src/lib.rs - LinuxTuplesConnection::replace_tuple (line 505)
[INFO] [stdout]     src/lib.rs - LinuxTuplesConnection::server_log (line 539)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 12 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `"docker" "inspect" "48c6ba122bbeb7ff6da5b3415ebe36d30eaaa4dcb1bcb4677afaece67bf9c603"`
[INFO] running `"docker" "rm" "-f" "48c6ba122bbeb7ff6da5b3415ebe36d30eaaa4dcb1bcb4677afaece67bf9c603"`
[INFO] [stdout] 48c6ba122bbeb7ff6da5b3415ebe36d30eaaa4dcb1bcb4677afaece67bf9c603