[INFO] crate python-launcher 0.7.2 is already in cache
[INFO] extracting crate python-launcher 0.7.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/python-launcher/0.7.2
[INFO] extracting crate python-launcher 0.7.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/python-launcher/0.7.2
[INFO] validating manifest of python-launcher-0.7.2 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 python-launcher-0.7.2 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 python-launcher-0.7.2
[INFO] finished frobbing python-launcher-0.7.2
[INFO] frobbed toml for python-launcher-0.7.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/python-launcher/0.7.2/Cargo.toml
[INFO] started frobbing python-launcher-0.7.2
[INFO] finished frobbing python-launcher-0.7.2
[INFO] frobbed toml for python-launcher-0.7.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/python-launcher/0.7.2/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 python-launcher-0.7.2 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/reg/python-launcher/0.7.2:/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] 9cc5589a8a63d1c56309c0ac244b2c85973105156318015222af4202c473b4a0
[INFO] running `"docker" "start" "-a" "9cc5589a8a63d1c56309c0ac244b2c85973105156318015222af4202c473b4a0"`
[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:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 |     let mut chosen_path: Option<path::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 2.28s
[INFO] running `"docker" "inspect" "9cc5589a8a63d1c56309c0ac244b2c85973105156318015222af4202c473b4a0"`
[INFO] running `"docker" "rm" "-f" "9cc5589a8a63d1c56309c0ac244b2c85973105156318015222af4202c473b4a0"`
[INFO] [stdout] 9cc5589a8a63d1c56309c0ac244b2c85973105156318015222af4202c473b4a0
[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/reg/python-launcher/0.7.2:/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] 2f73c1b430e92963a39ad007fc499e471c70359da9b03cbaad88b21ae8b31ac8
[INFO] running `"docker" "start" "-a" "2f73c1b430e92963a39ad007fc499e471c70359da9b03cbaad88b21ae8b31ac8"`
[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:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 |     let mut chosen_path: Option<path::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 2.07s
[INFO] running `"docker" "inspect" "2f73c1b430e92963a39ad007fc499e471c70359da9b03cbaad88b21ae8b31ac8"`
[INFO] running `"docker" "rm" "-f" "2f73c1b430e92963a39ad007fc499e471c70359da9b03cbaad88b21ae8b31ac8"`
[INFO] [stdout] 2f73c1b430e92963a39ad007fc499e471c70359da9b03cbaad88b21ae8b31ac8
[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/reg/python-launcher/0.7.2:/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] a2de187878402ebf36945bb9cc2eb873b338c05def0b24317ef1b4442162d3c6
[INFO] running `"docker" "start" "-a" "a2de187878402ebf36945bb9cc2eb873b338c05def0b24317ef1b4442162d3c6"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/python_launcher-9dc23c0cc9487b55
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test tests::test_split_shebang ... ok
[INFO] [stdout] test tests::test_requested_version_env_var ... ok
[INFO] [stdout] test tests::test_find_shebang ... ok
[INFO] [stdout] test tests::test_choose_executable ... ok
[INFO] [stdout] test tests::test_version_from_flag ... ok
[INFO] [stdout] test tests::test_version_matches ... ok
[INFO] [stdout] test tests::test_action_from_args ... ok
[INFO] [stdout] test tests::test_virtual_env ... ok
[INFO] [stdout] test tests::unit_test_path_entries ... ok
[INFO] [stdout] test tests::system_test_path_entries ... ok
[INFO] [stdout] test tests::test_filter_python_executables ... ok
[INFO] [stdout] test tests::test_RequestedVersion_from_string ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/py-640eb5e2e916921a
[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]    Doc-tests python-launcher
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - action_from_args (line 148) ... 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" "a2de187878402ebf36945bb9cc2eb873b338c05def0b24317ef1b4442162d3c6"`
[INFO] running `"docker" "rm" "-f" "a2de187878402ebf36945bb9cc2eb873b338c05def0b24317ef1b4442162d3c6"`
[INFO] [stdout] a2de187878402ebf36945bb9cc2eb873b338c05def0b24317ef1b4442162d3c6