[INFO] crate df2 0.1.0 is already in cache
[INFO] extracting crate df2 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/df2/0.1.0
[INFO] extracting crate df2 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/df2/0.1.0
[INFO] validating manifest of df2-0.1.0 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 df2-0.1.0 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 df2-0.1.0
[INFO] finished frobbing df2-0.1.0
[INFO] frobbed toml for df2-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/df2/0.1.0/Cargo.toml
[INFO] started frobbing df2-0.1.0
[INFO] finished frobbing df2-0.1.0
[INFO] frobbed toml for df2-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/df2/0.1.0/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 df2-0.1.0 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/df2/0.1.0:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] dbe2c94981a5828809181213c919661f637479e798bb6ce0fe85bc5c859627e7
[INFO] running `"docker" "start" "-a" "dbe2c94981a5828809181213c919661f637479e798bb6ce0fe85bc5c859627e7"`
[INFO] [stderr]    Compiling df2 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:39:32
[INFO] [stderr]    |
[INFO] [stderr] 39 |     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]     Finished dev [unoptimized + debuginfo] target(s) in 2.40s
[INFO] running `"docker" "inspect" "dbe2c94981a5828809181213c919661f637479e798bb6ce0fe85bc5c859627e7"`
[INFO] running `"docker" "rm" "-f" "dbe2c94981a5828809181213c919661f637479e798bb6ce0fe85bc5c859627e7"`
[INFO] [stdout] dbe2c94981a5828809181213c919661f637479e798bb6ce0fe85bc5c859627e7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/df2/0.1.0:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] a9939dffbd2bcabae22397114db455ae98834c3b033b46e2d1b18f171418ad9b
[INFO] running `"docker" "start" "-a" "a9939dffbd2bcabae22397114db455ae98834c3b033b46e2d1b18f171418ad9b"`
[INFO] [stderr]    Compiling df2 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:39:32
[INFO] [stderr]    |
[INFO] [stderr] 39 |     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]     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `"docker" "inspect" "a9939dffbd2bcabae22397114db455ae98834c3b033b46e2d1b18f171418ad9b"`
[INFO] running `"docker" "rm" "-f" "a9939dffbd2bcabae22397114db455ae98834c3b033b46e2d1b18f171418ad9b"`
[INFO] [stdout] a9939dffbd2bcabae22397114db455ae98834c3b033b46e2d1b18f171418ad9b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/df2/0.1.0:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 1a0a226ac0a5887d18b1c9b2e2bef3948eb332dd4c2bcaa37f1bfb86b51e7e8e
[INFO] running `"docker" "start" "-a" "1a0a226ac0a5887d18b1c9b2e2bef3948eb332dd4c2bcaa37f1bfb86b51e7e8e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/df2-06815afdb685d4bf
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test tests::reader_from_path ... ok
[INFO] [stdout] test tests::reader_iterator ... ok
[INFO] [stdout] test tests::reader_read_one ... ok
[INFO] [stdout] test tests::reader_seek_identical ... ok
[INFO] [stdout] test tests::segment_len ... ok
[INFO] [stdout] test tests::reader_seek_skip_two ... ok
[INFO] [stdout] test tests::segment_from_path ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/df2-c51b0c7d2ee9ca08
[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 df2
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test src/lib.rs - Reader<BufReader<File>>::from_path (line 79) ... ok
[INFO] [stdout] test src/lib.rs - Reader<R>::seek (line 141) ... ok
[INFO] [stdout] test src/lib.rs - Segment::from_read (line 227) ... ok
[INFO] [stdout] test src/lib.rs - Segment::from_path (line 213) ... ok
[INFO] [stdout] test src/lib.rs - Segment::is_empty (line 263) ... ok
[INFO] [stdout] test src/lib.rs - Segment::len (line 250) ... ok
[INFO] [stdout] test src/lib.rs - Reader<R>::read_one (line 94) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "1a0a226ac0a5887d18b1c9b2e2bef3948eb332dd4c2bcaa37f1bfb86b51e7e8e"`
[INFO] running `"docker" "rm" "-f" "1a0a226ac0a5887d18b1c9b2e2bef3948eb332dd4c2bcaa37f1bfb86b51e7e8e"`
[INFO] [stdout] 1a0a226ac0a5887d18b1c9b2e2bef3948eb332dd4c2bcaa37f1bfb86b51e7e8e