[INFO] updating cached repository brettcannon/python-launcher
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/brettcannon/python-launcher
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/brettcannon/python-launcher" "work/ex/beta-1.38-1/sources/1.37.0/gh/brettcannon/python-launcher"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/brettcannon/python-launcher'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/brettcannon/python-launcher" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/brettcannon/python-launcher"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/brettcannon/python-launcher'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b58ce5c68259b166d7d05590a456e9f62167fb43
[INFO] sha for GitHub repo brettcannon/python-launcher: b58ce5c68259b166d7d05590a456e9f62167fb43
[INFO] validating manifest of brettcannon/python-launcher 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 brettcannon/python-launcher 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 brettcannon/python-launcher
[INFO] finished frobbing brettcannon/python-launcher
[INFO] frobbed toml for brettcannon/python-launcher written to work/ex/beta-1.38-1/sources/1.37.0/gh/brettcannon/python-launcher/Cargo.toml
[INFO] started frobbing brettcannon/python-launcher
[INFO] finished frobbing brettcannon/python-launcher
[INFO] frobbed toml for brettcannon/python-launcher written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/brettcannon/python-launcher/Cargo.toml
[INFO] crate brettcannon/python-launcher already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing brettcannon/python-launcher against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/brettcannon/python-launcher:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 77b31d48b4765388a9ab6785d1f8390daad2a794db35479d57e8a6a24ad5db3c
[INFO] running `"docker" "start" "-a" "77b31d48b4765388a9ab6785d1f8390daad2a794db35479d57e8a6a24ad5db3c"`
[INFO] [stderr]    Compiling nix v0.13.0
[INFO] [stderr]    Compiling python-launcher v0.7.2 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let mut chosen_path: Option<PathBuf>;
[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]     Finished dev [unoptimized + debuginfo] target(s) in 11.12s
[INFO] running `"docker" "inspect" "77b31d48b4765388a9ab6785d1f8390daad2a794db35479d57e8a6a24ad5db3c"`
[INFO] running `"docker" "rm" "-f" "77b31d48b4765388a9ab6785d1f8390daad2a794db35479d57e8a6a24ad5db3c"`
[INFO] [stdout] 77b31d48b4765388a9ab6785d1f8390daad2a794db35479d57e8a6a24ad5db3c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/brettcannon/python-launcher:/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 15b62ea6f3f715d56e6445407fadd0e0a1f0064ed9b231b25ab23badf6a7f98f
[INFO] running `"docker" "start" "-a" "15b62ea6f3f715d56e6445407fadd0e0a1f0064ed9b231b25ab23badf6a7f98f"`
[INFO] [stderr]    Compiling python-launcher v0.7.2 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let mut chosen_path: Option<PathBuf>;
[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]     Finished dev [unoptimized + debuginfo] target(s) in 3.21s
[INFO] running `"docker" "inspect" "15b62ea6f3f715d56e6445407fadd0e0a1f0064ed9b231b25ab23badf6a7f98f"`
[INFO] running `"docker" "rm" "-f" "15b62ea6f3f715d56e6445407fadd0e0a1f0064ed9b231b25ab23badf6a7f98f"`
[INFO] [stdout] 15b62ea6f3f715d56e6445407fadd0e0a1f0064ed9b231b25ab23badf6a7f98f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/brettcannon/python-launcher:/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-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 6a146e1e89e986d298e4ada9f1b60f1fc76e213fffd806a11984fcff74e14add
[INFO] running `"docker" "start" "-a" "6a146e1e89e986d298e4ada9f1b60f1fc76e213fffd806a11984fcff74e14add"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/python_launcher-cdf8fbcf2dbf72d4
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test tests::test_requested_version_env_var ... ok
[INFO] [stdout] test tests::test_find_shebang ... ok
[INFO] [stdout] test tests::test_filter_python_executables ... ok
[INFO] [stdout] test tests::test_choose_executable ... ok
[INFO] [stdout] test tests::test_action_from_args ... ok
[INFO] [stdout] test tests::test_version_from_flag ... ok
[INFO] [stdout] test tests::test_version_matches ... ok
[INFO] [stdout] test tests::system_test_path_entries ... ok
[INFO] [stdout] test tests::test_virtual_env ... ok
[INFO] [stdout] test tests::test_split_shebang ... ok
[INFO] [stdout] test tests::test_RequestedVersion_from_string ... ok
[INFO] [stdout] test tests::unit_test_path_entries ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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/py-3be56119aeb5f95f
[INFO] [stderr]    Doc-tests python-launcher
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - action_from_args (line 149) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "6a146e1e89e986d298e4ada9f1b60f1fc76e213fffd806a11984fcff74e14add"`
[INFO] running `"docker" "rm" "-f" "6a146e1e89e986d298e4ada9f1b60f1fc76e213fffd806a11984fcff74e14add"`
[INFO] [stdout] 6a146e1e89e986d298e4ada9f1b60f1fc76e213fffd806a11984fcff74e14add