[INFO] crate bitfields 0.2.0 is already in cache
[INFO] extracting crate bitfields 0.2.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/bitfields/0.2.0
[INFO] extracting crate bitfields 0.2.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/bitfields/0.2.0
[INFO] validating manifest of bitfields-0.2.0 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 bitfields-0.2.0 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 bitfields-0.2.0
[INFO] finished frobbing bitfields-0.2.0
[INFO] frobbed toml for bitfields-0.2.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/bitfields/0.2.0/Cargo.toml
[INFO] started frobbing bitfields-0.2.0
[INFO] finished frobbing bitfields-0.2.0
[INFO] frobbed toml for bitfields-0.2.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/bitfields/0.2.0/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] [stderr]     Blocking waiting for file lock on package cache
[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 bitfields-0.2.0 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/bitfields/0.2.0:/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] 30490fe6318de9d8813086422b0c3ed5e3ec00935b423bb7fdfd72f83d165cdb
[INFO] running `"docker" "start" "-a" "30490fe6318de9d8813086422b0c3ed5e3ec00935b423bb7fdfd72f83d165cdb"`
[INFO] [stderr]    Compiling bitfields v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `byte_bit_offset`
[INFO] [stderr]    --> src/lib.rs:105:5
[INFO] [stderr]     |
[INFO] [stderr] 105 |     pub fn byte_bit_offset(idx: usize) -> (usize, usize) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_bit`
[INFO] [stderr]    --> src/lib.rs:113:5
[INFO] [stderr]     |
[INFO] [stderr] 113 |     pub fn test_bit(target: &u8, pos: usize) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `set_bit`
[INFO] [stderr]    --> src/lib.rs:117:5
[INFO] [stderr]     |
[INFO] [stderr] 117 |     pub fn set_bit(target: &mut u8, pos: usize) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `unset_bit`
[INFO] [stderr]    --> src/lib.rs:125:5
[INFO] [stderr]     |
[INFO] [stderr] 125 |     pub fn unset_bit(target: &mut u8, pos: usize) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `toggle_bit`
[INFO] [stderr]    --> src/lib.rs:129:5
[INFO] [stderr]     |
[INFO] [stderr] 129 |     pub fn toggle_bit(target: &mut u8, pos: usize) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `"docker" "inspect" "30490fe6318de9d8813086422b0c3ed5e3ec00935b423bb7fdfd72f83d165cdb"`
[INFO] running `"docker" "rm" "-f" "30490fe6318de9d8813086422b0c3ed5e3ec00935b423bb7fdfd72f83d165cdb"`
[INFO] [stdout] 30490fe6318de9d8813086422b0c3ed5e3ec00935b423bb7fdfd72f83d165cdb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/bitfields/0.2.0:/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] e0aa82771585082dc1ec5207c690e3e301ba830a9bbca68f9aaa925166ec5575
[INFO] running `"docker" "start" "-a" "e0aa82771585082dc1ec5207c690e3e301ba830a9bbca68f9aaa925166ec5575"`
[INFO] [stderr]    Compiling bitfields v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:394:13
[INFO] [stderr]     |
[INFO] [stderr] 394 |         let mut storage = vec![0u8];
[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] warning: function is never used: `byte_bit_offset`
[INFO] [stderr]    --> src/lib.rs:105:5
[INFO] [stderr]     |
[INFO] [stderr] 105 |     pub fn byte_bit_offset(idx: usize) -> (usize, usize) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.07s
[INFO] running `"docker" "inspect" "e0aa82771585082dc1ec5207c690e3e301ba830a9bbca68f9aaa925166ec5575"`
[INFO] running `"docker" "rm" "-f" "e0aa82771585082dc1ec5207c690e3e301ba830a9bbca68f9aaa925166ec5575"`
[INFO] [stdout] e0aa82771585082dc1ec5207c690e3e301ba830a9bbca68f9aaa925166ec5575
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/bitfields/0.2.0:/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] 5c4ab2c233933f367f3eb8bfb28715fe5265e2c5bf3e34a7ffe8b0d50fcb146b
[INFO] running `"docker" "start" "-a" "5c4ab2c233933f367f3eb8bfb28715fe5265e2c5bf3e34a7ffe8b0d50fcb146b"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/bitfields-6cf51811827c94c9
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test bit_twiddles::twiddle_tests::toggle ... ok
[INFO] [stdout] test bit_twiddles::twiddle_tests::get ... ok
[INFO] [stdout] test bit_twiddles::twiddle_tests::set ... ok
[INFO] [stdout] test bit_twiddles::twiddle_tests::set_to ... ok
[INFO] [stdout] test bit_twiddles::twiddle_tests::test ... ok
[INFO] [stdout] test tests::corrupted_read ... ok
[INFO] [stdout] test tests::invalid_field ... ok
[INFO] [stdout] test bit_twiddles::twiddle_tests::unset ... ok
[INFO] [stdout] test tests::store_and_retrieve ... ok
[INFO] [stdout] test tests::store_too_wide ... ok
[INFO] [stdout] test tests::overwrite ... ok
[INFO] [stdout] test bit_twiddles::twiddle_tests::set_to_with_large_pos ... ok
[INFO] [stdout] test bit_twiddles::twiddle_tests::get_with_large_pos ... ok
[INFO] [stdout] test bit_twiddles::twiddle_tests::set_with_large_pos ... ok
[INFO] [stdout] test bit_twiddles::twiddle_tests::unset_with_large_pos ... ok
[INFO] [stdout] test bit_twiddles::twiddle_tests::toggle_with_large_pos ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests bitfields
[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" "5c4ab2c233933f367f3eb8bfb28715fe5265e2c5bf3e34a7ffe8b0d50fcb146b"`
[INFO] running `"docker" "rm" "-f" "5c4ab2c233933f367f3eb8bfb28715fe5265e2c5bf3e34a7ffe8b0d50fcb146b"`
[INFO] [stdout] 5c4ab2c233933f367f3eb8bfb28715fe5265e2c5bf3e34a7ffe8b0d50fcb146b