[INFO] cloning repository quirinux/rust-core-utils [INFO] running `"git" "clone" "--bare" "git://github.com/quirinux/rust-core-utils.git" "work/cache/sources/gh/quirinux/rust-core-utils"` [INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/quirinux/rust-core-utils'... [INFO] running `"git" "clone" "work/cache/sources/gh/quirinux/rust-core-utils" "work/ex/beta-1.37-6/sources/1.36.0/gh/quirinux/rust-core-utils"` [INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/quirinux/rust-core-utils'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/quirinux/rust-core-utils" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/quirinux/rust-core-utils"` [INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/quirinux/rust-core-utils'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 92441ff9a19233642d3e5d599ddd7604c9674beb [INFO] sha for GitHub repo quirinux/rust-core-utils: 92441ff9a19233642d3e5d599ddd7604c9674beb [INFO] validating manifest of quirinux/rust-core-utils on toolchain 1.36.0 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of quirinux/rust-core-utils on toolchain beta-2019-07-23 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing quirinux/rust-core-utils [INFO] finished frobbing quirinux/rust-core-utils [INFO] frobbed toml for quirinux/rust-core-utils written to work/ex/beta-1.37-6/sources/1.36.0/gh/quirinux/rust-core-utils/Cargo.toml [INFO] started frobbing quirinux/rust-core-utils [INFO] finished frobbing quirinux/rust-core-utils [INFO] frobbed toml for quirinux/rust-core-utils written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/quirinux/rust-core-utils/Cargo.toml [INFO] crate quirinux/rust-core-utils already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] [stderr] Blocking waiting for file lock on package cache lock [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] testing quirinux/rust-core-utils against beta-2019-07-23 for beta-1.37-6 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/quirinux/rust-core-utils:/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-2019-07-23" "build" "--frozen"` [INFO] [stdout] c4231b971646e27fceb4bf1667035989bd04f80b3643ee4ad9a593a54c3f174d [INFO] running `"docker" "start" "-a" "c4231b971646e27fceb4bf1667035989bd04f80b3643ee4ad9a593a54c3f174d"` [INFO] [stderr] Compiling libc v0.2.58 [INFO] [stderr] Compiling syn v0.15.36 [INFO] [stderr] Compiling regex v1.1.7 [INFO] [stderr] Compiling termcolor v1.0.5 [INFO] [stderr] Compiling crossbeam-utils v0.6.5 [INFO] [stderr] Compiling log v0.4.6 [INFO] [stderr] Compiling regex-syntax v0.6.7 [INFO] [stderr] Compiling humantime v1.2.0 [INFO] [stderr] Compiling quote v0.6.12 [INFO] [stderr] Compiling aho-corasick v0.7.4 [INFO] [stderr] Compiling crossbeam-epoch v0.7.1 [INFO] [stderr] Compiling crossbeam-channel v0.3.8 [INFO] [stderr] Compiling crossbeam-queue v0.1.2 [INFO] [stderr] Compiling crossbeam-deque v0.7.1 [INFO] [stderr] Compiling atty v0.2.11 [INFO] [stderr] Compiling clap v2.33.0 [INFO] [stderr] Compiling crossbeam v0.7.1 [INFO] [stderr] Compiling structopt-derive v0.2.16 [INFO] [stderr] Compiling structopt v0.2.16 [INFO] [stderr] Compiling env_logger v0.6.2 [INFO] [stderr] Compiling rust-core-utils v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/bin/util/file.rs:17:18 [INFO] [stderr] | [INFO] [stderr] 17 | bufread: Box, [INFO] [stderr] | ^^^^^^^ help: use `dyn`: `dyn BufRead` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(bare_trait_objects)] on by default [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/bin/util/file.rs:17:18 [INFO] [stderr] | [INFO] [stderr] 17 | bufread: Box, [INFO] [stderr] | ^^^^^^^ help: use `dyn`: `dyn BufRead` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(bare_trait_objects)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `valid_line` [INFO] [stderr] --> src/bin/cat.rs:137:21 [INFO] [stderr] | [INFO] [stderr] 137 | let mut valid_line = false; [INFO] [stderr] | ^^^^^^^^^^ help: consider prefixing with an underscore: `_valid_line` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `blank_line_count` [INFO] [stderr] --> src/bin/cat.rs:143:30 [INFO] [stderr] | [INFO] [stderr] 143 | let (valid_line, blank_line_count) = valid(line.clone(), blank_line_count, opt.squeeze_blank); [INFO] [stderr] | ^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_blank_line_count` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/bin/cat.rs:137:17 [INFO] [stderr] | [INFO] [stderr] 137 | let mut valid_line = false; [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: method is never used: `walk_buffer_bytes` [INFO] [stderr] --> src/bin/util/file.rs:95:5 [INFO] [stderr] | [INFO] [stderr] 95 | pub fn walk_buffer_bytes(&mut self, bytes: usize) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: method is never used: `walk_buffer_lines` [INFO] [stderr] --> src/bin/util/file.rs:102:5 [INFO] [stderr] | [INFO] [stderr] 102 | pub fn walk_buffer_lines(&mut self, lines: usize) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `last_bytes` [INFO] [stderr] --> src/bin/util/file.rs:108:5 [INFO] [stderr] | [INFO] [stderr] 108 | pub fn last_bytes(&mut self, bytes: usize) -> (usize, Vec) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `last_lines` [INFO] [stderr] --> src/bin/util/file.rs:128:5 [INFO] [stderr] | [INFO] [stderr] 128 | pub fn last_lines(&mut self, lines: usize) -> (usize, Vec) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `path` [INFO] [stderr] --> src/bin/util/file.rs:146:5 [INFO] [stderr] | [INFO] [stderr] 146 | pub fn path(&self) -> String { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `len` [INFO] [stderr] --> src/bin/util/file.rs:150:5 [INFO] [stderr] | [INFO] [stderr] 150 | pub fn len(&self) -> Result { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/bin/head.rs:55:9 [INFO] [stderr] | [INFO] [stderr] 55 | writter.write_all(&b.unwrap()); [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: method is never used: `walk_buffer_bytes` [INFO] [stderr] --> src/bin/util/file.rs:95:5 [INFO] [stderr] | [INFO] [stderr] 95 | pub fn walk_buffer_bytes(&mut self, bytes: usize) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: method is never used: `walk_buffer_lines` [INFO] [stderr] --> src/bin/util/file.rs:102:5 [INFO] [stderr] | [INFO] [stderr] 102 | pub fn walk_buffer_lines(&mut self, lines: usize) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `last_bytes` [INFO] [stderr] --> src/bin/util/file.rs:108:5 [INFO] [stderr] | [INFO] [stderr] 108 | pub fn last_bytes(&mut self, bytes: usize) -> (usize, Vec) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `last_lines` [INFO] [stderr] --> src/bin/util/file.rs:128:5 [INFO] [stderr] | [INFO] [stderr] 128 | pub fn last_lines(&mut self, lines: usize) -> (usize, Vec) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `path` [INFO] [stderr] --> src/bin/util/file.rs:146:5 [INFO] [stderr] | [INFO] [stderr] 146 | pub fn path(&self) -> String { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `len` [INFO] [stderr] --> src/bin/util/file.rs:150:5 [INFO] [stderr] | [INFO] [stderr] 150 | pub fn len(&self) -> Result { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/bin/cat.rs:153:13 [INFO] [stderr] | [INFO] [stderr] 153 | / match f.read_chunk(size) { [INFO] [stderr] 154 | | Some(b) => writter.write_all(&b), [INFO] [stderr] 155 | | _ => Ok(()), [INFO] [stderr] 156 | | }; [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] Finished dev [unoptimized + debuginfo] target(s) in 45.56s [INFO] running `"docker" "inspect" "c4231b971646e27fceb4bf1667035989bd04f80b3643ee4ad9a593a54c3f174d"` [INFO] running `"docker" "rm" "-f" "c4231b971646e27fceb4bf1667035989bd04f80b3643ee4ad9a593a54c3f174d"` [INFO] [stdout] c4231b971646e27fceb4bf1667035989bd04f80b3643ee4ad9a593a54c3f174d [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/quirinux/rust-core-utils:/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-2019-07-23" "test" "--frozen" "--no-run"` [INFO] [stdout] d0030cebb48afd7b66f4a4451599da889f485574476450ab3113d24b5b1a5a2b [INFO] running `"docker" "start" "-a" "d0030cebb48afd7b66f4a4451599da889f485574476450ab3113d24b5b1a5a2b"` [INFO] [stderr] Compiling rust-core-utils v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/bin/util/file.rs:17:18 [INFO] [stderr] | [INFO] [stderr] 17 | bufread: Box, [INFO] [stderr] | ^^^^^^^ help: use `dyn`: `dyn BufRead` [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/bin/util/file.rs:17:18 [INFO] [stderr] | [INFO] [stderr] 17 | bufread: Box, [INFO] [stderr] | ^^^^^^^ help: use `dyn`: `dyn BufRead` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(bare_trait_objects)] on by default [INFO] [stderr] [INFO] [stderr] | [INFO] [stderr] = note: #[warn(bare_trait_objects)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `valid_line` [INFO] [stderr] --> src/bin/cat.rs:137:21 [INFO] [stderr] | [INFO] [stderr] 137 | let mut valid_line = false; [INFO] [stderr] | ^^^^^^^^^^ help: consider prefixing with an underscore: `_valid_line` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `blank_line_count` [INFO] [stderr] --> src/bin/cat.rs:143:30 [INFO] [stderr] | [INFO] [stderr] 143 | let (valid_line, blank_line_count) = valid(line.clone(), blank_line_count, opt.squeeze_blank); [INFO] [stderr] | ^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_blank_line_count` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/bin/cat.rs:137:17 [INFO] [stderr] | [INFO] [stderr] 137 | let mut valid_line = false; [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: method is never used: `walk_buffer_bytes` [INFO] [stderr] --> src/bin/util/file.rs:95:5 [INFO] [stderr] | [INFO] [stderr] 95 | pub fn walk_buffer_bytes(&mut self, bytes: usize) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: method is never used: `walk_buffer_lines` [INFO] [stderr] --> src/bin/util/file.rs:102:5 [INFO] [stderr] | [INFO] [stderr] 102 | pub fn walk_buffer_lines(&mut self, lines: usize) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `last_bytes` [INFO] [stderr] --> src/bin/util/file.rs:108:5 [INFO] [stderr] | [INFO] [stderr] 108 | pub fn last_bytes(&mut self, bytes: usize) -> (usize, Vec) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `last_lines` [INFO] [stderr] --> src/bin/util/file.rs:128:5 [INFO] [stderr] | [INFO] [stderr] 128 | pub fn last_lines(&mut self, lines: usize) -> (usize, Vec) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `path` [INFO] [stderr] --> src/bin/util/file.rs:146:5 [INFO] [stderr] | [INFO] [stderr] 146 | pub fn path(&self) -> String { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `len` [INFO] [stderr] --> src/bin/util/file.rs:150:5 [INFO] [stderr] | [INFO] [stderr] 150 | pub fn len(&self) -> Result { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/bin/cat.rs:153:13 [INFO] [stderr] | [INFO] [stderr] 153 | / match f.read_chunk(size) { [INFO] [stderr] 154 | | Some(b) => writter.write_all(&b), [INFO] [stderr] 155 | | _ => Ok(()), [INFO] [stderr] 156 | | }; [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: method is never used: `walk_buffer_bytes` [INFO] [stderr] --> src/bin/util/file.rs:95:5 [INFO] [stderr] | [INFO] [stderr] 95 | pub fn walk_buffer_bytes(&mut self, bytes: usize) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: method is never used: `walk_buffer_lines` [INFO] [stderr] --> src/bin/util/file.rs:102:5 [INFO] [stderr] | [INFO] [stderr] 102 | pub fn walk_buffer_lines(&mut self, lines: usize) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `last_bytes` [INFO] [stderr] --> src/bin/util/file.rs:108:5 [INFO] [stderr] | [INFO] [stderr] 108 | pub fn last_bytes(&mut self, bytes: usize) -> (usize, Vec) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `last_lines` [INFO] [stderr] --> src/bin/util/file.rs:128:5 [INFO] [stderr] | [INFO] [stderr] 128 | pub fn last_lines(&mut self, lines: usize) -> (usize, Vec) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `path` [INFO] [stderr] --> src/bin/util/file.rs:146:5 [INFO] [stderr] | [INFO] [stderr] 146 | pub fn path(&self) -> String { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `len` [INFO] [stderr] --> src/bin/util/file.rs:150:5 [INFO] [stderr] | [INFO] [stderr] 150 | pub fn len(&self) -> Result { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/bin/head.rs:55:9 [INFO] [stderr] | [INFO] [stderr] 55 | writter.write_all(&b.unwrap()); [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] Finished dev [unoptimized + debuginfo] target(s) in 1.48s [INFO] running `"docker" "inspect" "d0030cebb48afd7b66f4a4451599da889f485574476450ab3113d24b5b1a5a2b"` [INFO] running `"docker" "rm" "-f" "d0030cebb48afd7b66f4a4451599da889f485574476450ab3113d24b5b1a5a2b"` [INFO] [stdout] d0030cebb48afd7b66f4a4451599da889f485574476450ab3113d24b5b1a5a2b [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/quirinux/rust-core-utils:/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-2019-07-23" "test" "--frozen"` [INFO] [stdout] 8c97508fb9b08ef3f39297882ee31ccfe8c895b5ebf1e20b525367eda2635820 [INFO] running `"docker" "start" "-a" "8c97508fb9b08ef3f39297882ee31ccfe8c895b5ebf1e20b525367eda2635820"` [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.07s [INFO] [stderr] Running /opt/crater/target/debug/deps/cat-75ffc00672079c90 [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] [stderr] Running /opt/crater/target/debug/deps/echo-a97b3795287655b1 [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] [stderr] Running /opt/crater/target/debug/deps/head-15907b740e81eb26 [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] running `"docker" "inspect" "8c97508fb9b08ef3f39297882ee31ccfe8c895b5ebf1e20b525367eda2635820"` [INFO] running `"docker" "rm" "-f" "8c97508fb9b08ef3f39297882ee31ccfe8c895b5ebf1e20b525367eda2635820"` [INFO] [stdout] 8c97508fb9b08ef3f39297882ee31ccfe8c895b5ebf1e20b525367eda2635820