[INFO] updating cached repository slayzz/rust-grep
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/slayzz/rust-grep
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/slayzz/rust-grep" "work/ex/beta-1.37-6/sources/1.36.0/gh/slayzz/rust-grep"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/slayzz/rust-grep'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/slayzz/rust-grep" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/slayzz/rust-grep"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/slayzz/rust-grep'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 756d084a32235ef05067a06708484eae551f050a
[INFO] sha for GitHub repo slayzz/rust-grep: 756d084a32235ef05067a06708484eae551f050a
[INFO] validating manifest of slayzz/rust-grep 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 slayzz/rust-grep 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 slayzz/rust-grep
[INFO] finished frobbing slayzz/rust-grep
[INFO] frobbed toml for slayzz/rust-grep written to work/ex/beta-1.37-6/sources/1.36.0/gh/slayzz/rust-grep/Cargo.toml
[INFO] started frobbing slayzz/rust-grep
[INFO] finished frobbing slayzz/rust-grep
[INFO] frobbed toml for slayzz/rust-grep written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/slayzz/rust-grep/Cargo.toml
[INFO] crate slayzz/rust-grep 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing slayzz/rust-grep 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-1/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/slayzz/rust-grep:/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] 0c2fa2b7085d3c0829ed0cac53e70426ad55402a8e434beff1d4867690a5515c
[INFO] running `"docker" "start" "-a" "0c2fa2b7085d3c0829ed0cac53e70426ad55402a8e434beff1d4867690a5515c"`
[INFO] [stderr]    Compiling libc v0.2.48
[INFO] [stderr]    Compiling memchr v2.1.3
[INFO] [stderr]    Compiling aho-corasick v0.6.9
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]    Compiling command_line v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `invalid_error`
[INFO] [stderr]   --> src/utils/mod.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub fn invalid_error(value: &str) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_error`
[INFO] [stderr]   --> src/utils/mod.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub fn print_error(text: &str) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/utils/mod.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     stderr().write(format!("{}\n", HELP_TEXT).as_bytes());
[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/utils/mod.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     stderr().write(text.as_bytes());
[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 12.60s
[INFO] running `"docker" "inspect" "0c2fa2b7085d3c0829ed0cac53e70426ad55402a8e434beff1d4867690a5515c"`
[INFO] running `"docker" "rm" "-f" "0c2fa2b7085d3c0829ed0cac53e70426ad55402a8e434beff1d4867690a5515c"`
[INFO] [stdout] 0c2fa2b7085d3c0829ed0cac53e70426ad55402a8e434beff1d4867690a5515c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/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/slayzz/rust-grep:/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] 680084736c72e7b4af249325f90fdb7f440368d082a5bc324be06ab5b8b876e7
[INFO] running `"docker" "start" "-a" "680084736c72e7b4af249325f90fdb7f440368d082a5bc324be06ab5b8b876e7"`
[INFO] [stderr]    Compiling command_line v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `invalid_error`
[INFO] [stderr]   --> src/utils/mod.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub fn invalid_error(value: &str) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_error`
[INFO] [stderr]   --> src/utils/mod.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub fn print_error(text: &str) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/utils/mod.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     stderr().write(format!("{}\n", HELP_TEXT).as_bytes());
[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/utils/mod.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     stderr().write(text.as_bytes());
[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 0.75s
[INFO] running `"docker" "inspect" "680084736c72e7b4af249325f90fdb7f440368d082a5bc324be06ab5b8b876e7"`
[INFO] running `"docker" "rm" "-f" "680084736c72e7b4af249325f90fdb7f440368d082a5bc324be06ab5b8b876e7"`
[INFO] [stdout] 680084736c72e7b4af249325f90fdb7f440368d082a5bc324be06ab5b8b876e7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/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/slayzz/rust-grep:/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] c757a109b3ce4989201ebc0b463dd99a43d396530eb1933455a22a6e6544753f
[INFO] running `"docker" "start" "-a" "c757a109b3ce4989201ebc0b463dd99a43d396530eb1933455a22a6e6544753f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/command_line-653f8016097bd7e3
[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" "c757a109b3ce4989201ebc0b463dd99a43d396530eb1933455a22a6e6544753f"`
[INFO] running `"docker" "rm" "-f" "c757a109b3ce4989201ebc0b463dd99a43d396530eb1933455a22a6e6544753f"`
[INFO] [stdout] c757a109b3ce4989201ebc0b463dd99a43d396530eb1933455a22a6e6544753f