[INFO] crate mime-detective 0.2.2 is already in cache
[INFO] extracting crate mime-detective 0.2.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/mime-detective/0.2.2
[INFO] extracting crate mime-detective 0.2.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/mime-detective/0.2.2
[INFO] validating manifest of mime-detective-0.2.2 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 mime-detective-0.2.2 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 mime-detective-0.2.2
[INFO] finished frobbing mime-detective-0.2.2
[INFO] frobbed toml for mime-detective-0.2.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/mime-detective/0.2.2/Cargo.toml
[INFO] started frobbing mime-detective-0.2.2
[INFO] finished frobbing mime-detective-0.2.2
[INFO] frobbed toml for mime-detective-0.2.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/mime-detective/0.2.2/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing mime-detective-0.2.2 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-6/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/mime-detective/0.2.2:/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] 0a5d1bb511d7219480ef506552db7f4d59db4c65e980ca390583d69cc9d47486
[INFO] running `"docker" "start" "-a" "0a5d1bb511d7219480ef506552db7f4d59db4c65e980ca390583d69cc9d47486"`
[INFO] [stderr]    Compiling magic-sys v0.2.0
[INFO] [stderr]    Compiling magic v0.12.2
[INFO] [stderr]    Compiling mime-detective v0.2.2 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:84:32
[INFO] [stderr]    |
[INFO] [stderr] 84 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/lib.rs:86:51
[INFO] [stderr]    |
[INFO] [stderr] 86 |             DetectiveError::Magic(ref err) => err.cause(),
[INFO] [stderr]    |                                                   ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/lib.rs:87:51
[INFO] [stderr]    |
[INFO] [stderr] 87 |             DetectiveError::Parse(ref err) => err.cause(),
[INFO] [stderr]    |                                                   ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/lib.rs:88:48
[INFO] [stderr]    |
[INFO] [stderr] 88 |             DetectiveError::IO(ref err) => err.cause(),
[INFO] [stderr]    |                                                ^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `"docker" "inspect" "0a5d1bb511d7219480ef506552db7f4d59db4c65e980ca390583d69cc9d47486"`
[INFO] running `"docker" "rm" "-f" "0a5d1bb511d7219480ef506552db7f4d59db4c65e980ca390583d69cc9d47486"`
[INFO] [stdout] 0a5d1bb511d7219480ef506552db7f4d59db4c65e980ca390583d69cc9d47486
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/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/mime-detective/0.2.2:/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] 6d2a75900306e4acedcd8508a2b5972e2b60a13efcf21f9b4ded2c3011b5b011
[INFO] running `"docker" "start" "-a" "6d2a75900306e4acedcd8508a2b5972e2b60a13efcf21f9b4ded2c3011b5b011"`
[INFO] [stderr]    Compiling mime-detective v0.2.2 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:84:32
[INFO] [stderr]    |
[INFO] [stderr] 84 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/lib.rs:86:51
[INFO] [stderr]    |
[INFO] [stderr] 86 |             DetectiveError::Magic(ref err) => err.cause(),
[INFO] [stderr]    |                                                   ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/lib.rs:87:51
[INFO] [stderr]    |
[INFO] [stderr] 87 |             DetectiveError::Parse(ref err) => err.cause(),
[INFO] [stderr]    |                                                   ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/lib.rs:88:48
[INFO] [stderr]    |
[INFO] [stderr] 88 |             DetectiveError::IO(ref err) => err.cause(),
[INFO] [stderr]    |                                                ^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `"docker" "inspect" "6d2a75900306e4acedcd8508a2b5972e2b60a13efcf21f9b4ded2c3011b5b011"`
[INFO] running `"docker" "rm" "-f" "6d2a75900306e4acedcd8508a2b5972e2b60a13efcf21f9b4ded2c3011b5b011"`
[INFO] [stdout] 6d2a75900306e4acedcd8508a2b5972e2b60a13efcf21f9b4ded2c3011b5b011
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/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/mime-detective/0.2.2:/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] 55b44f512d29bdd810933d53ba16ccb3cd0cf0a3f52f20e0ef43a85e3e07f3fb
[INFO] running `"docker" "start" "-a" "55b44f512d29bdd810933d53ba16ccb3cd0cf0a3f52f20e0ef43a85e3e07f3fb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mime_detective-ee08ddaa6b70f7d5
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::detect_buffer ... ok
[INFO] [stdout] test tests::detect_file ... ok
[INFO] [stdout] test tests::detect_filepath ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mime-detective
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs -  (line 6) ... 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" "55b44f512d29bdd810933d53ba16ccb3cd0cf0a3f52f20e0ef43a85e3e07f3fb"`
[INFO] running `"docker" "rm" "-f" "55b44f512d29bdd810933d53ba16ccb3cd0cf0a3f52f20e0ef43a85e3e07f3fb"`
[INFO] [stdout] 55b44f512d29bdd810933d53ba16ccb3cd0cf0a3f52f20e0ef43a85e3e07f3fb