[INFO] updating cached repository vksmgr/read_file
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/vksmgr/read_file
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/vksmgr/read_file" "work/ex/beta-1.37-6/sources/1.36.0/gh/vksmgr/read_file"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/vksmgr/read_file'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/vksmgr/read_file" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/vksmgr/read_file"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/vksmgr/read_file'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f96ec36295573c4745725ddbaa5f3b90a4d72e4b
[INFO] sha for GitHub repo vksmgr/read_file: f96ec36295573c4745725ddbaa5f3b90a4d72e4b
[INFO] validating manifest of vksmgr/read_file 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 vksmgr/read_file 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 vksmgr/read_file
[INFO] finished frobbing vksmgr/read_file
[INFO] frobbed toml for vksmgr/read_file written to work/ex/beta-1.37-6/sources/1.36.0/gh/vksmgr/read_file/Cargo.toml
[INFO] started frobbing vksmgr/read_file
[INFO] finished frobbing vksmgr/read_file
[INFO] frobbed toml for vksmgr/read_file written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/vksmgr/read_file/Cargo.toml
[INFO] crate vksmgr/read_file 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] testing vksmgr/read_file 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-4/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/vksmgr/read_file:/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] e7a1bbb15f145c0875c9895e7a05cc91850eb945de7fce09bfb55b5db7b34800
[INFO] running `"docker" "start" "-a" "e7a1bbb15f145c0875c9895e7a05cc91850eb945de7fce09bfb55b5db7b34800"`
[INFO] [stderr]    Compiling os v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right': superseded by `trim_end`
[INFO] [stderr]   --> src/main.rs:37:37
[INFO] [stderr]    |
[INFO] [stderr] 37 |                 let line = self.buf.trim_right();
[INFO] [stderr]    |                                     ^^^^^^^^^^ help: replace the use of the deprecated item: `trim_end`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     read_all_lines("test.txt");
[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 0.85s
[INFO] running `"docker" "inspect" "e7a1bbb15f145c0875c9895e7a05cc91850eb945de7fce09bfb55b5db7b34800"`
[INFO] running `"docker" "rm" "-f" "e7a1bbb15f145c0875c9895e7a05cc91850eb945de7fce09bfb55b5db7b34800"`
[INFO] [stdout] e7a1bbb15f145c0875c9895e7a05cc91850eb945de7fce09bfb55b5db7b34800
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/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/vksmgr/read_file:/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] 9ae0bbd5aecf3d75fd01039c7ccea76a7bffc7159927821a6d03807c68292fd7
[INFO] running `"docker" "start" "-a" "9ae0bbd5aecf3d75fd01039c7ccea76a7bffc7159927821a6d03807c68292fd7"`
[INFO] [stderr]    Compiling os v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right': superseded by `trim_end`
[INFO] [stderr]   --> src/main.rs:37:37
[INFO] [stderr]    |
[INFO] [stderr] 37 |                 let line = self.buf.trim_right();
[INFO] [stderr]    |                                     ^^^^^^^^^^ help: replace the use of the deprecated item: `trim_end`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     read_all_lines("test.txt");
[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 0.57s
[INFO] running `"docker" "inspect" "9ae0bbd5aecf3d75fd01039c7ccea76a7bffc7159927821a6d03807c68292fd7"`
[INFO] running `"docker" "rm" "-f" "9ae0bbd5aecf3d75fd01039c7ccea76a7bffc7159927821a6d03807c68292fd7"`
[INFO] [stdout] 9ae0bbd5aecf3d75fd01039c7ccea76a7bffc7159927821a6d03807c68292fd7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/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/vksmgr/read_file:/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] 01e120dcc9317b6a12ba830d8420cfc7affffe8d67755e868a80132f87fbd243
[INFO] running `"docker" "start" "-a" "01e120dcc9317b6a12ba830d8420cfc7affffe8d67755e868a80132f87fbd243"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/os-b9f3fbbe861b169c
[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" "01e120dcc9317b6a12ba830d8420cfc7affffe8d67755e868a80132f87fbd243"`
[INFO] running `"docker" "rm" "-f" "01e120dcc9317b6a12ba830d8420cfc7affffe8d67755e868a80132f87fbd243"`
[INFO] [stdout] 01e120dcc9317b6a12ba830d8420cfc7affffe8d67755e868a80132f87fbd243