[INFO] crate bitterlemon 0.2.2 is already in cache
[INFO] extracting crate bitterlemon 0.2.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/bitterlemon/0.2.2
[INFO] extracting crate bitterlemon 0.2.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/bitterlemon/0.2.2
[INFO] validating manifest of bitterlemon-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 bitterlemon-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 bitterlemon-0.2.2
[INFO] finished frobbing bitterlemon-0.2.2
[INFO] frobbed toml for bitterlemon-0.2.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/bitterlemon/0.2.2/Cargo.toml
[INFO] started frobbing bitterlemon-0.2.2
[INFO] finished frobbing bitterlemon-0.2.2
[INFO] frobbed toml for bitterlemon-0.2.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/bitterlemon/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] testing bitterlemon-0.2.2 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/bitterlemon/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 3e5ed11e2a60eb5c2d4ea360cde183a9f9f7869abde646abce25051c8ce0db6a
[INFO] running `"docker" "start" "-a" "3e5ed11e2a60eb5c2d4ea360cde183a9f9f7869abde646abce25051c8ce0db6a"`
[INFO] [stderr]    Compiling bitterlemon v0.2.2 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/encode.rs:307:7
[INFO] [stderr]     |
[INFO] [stderr] 307 |         let mut head_run = self.get_mut(*ptr as usize).unwrap();
[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 0.49s
[INFO] running `"docker" "inspect" "3e5ed11e2a60eb5c2d4ea360cde183a9f9f7869abde646abce25051c8ce0db6a"`
[INFO] running `"docker" "rm" "-f" "3e5ed11e2a60eb5c2d4ea360cde183a9f9f7869abde646abce25051c8ce0db6a"`
[INFO] [stdout] 3e5ed11e2a60eb5c2d4ea360cde183a9f9f7869abde646abce25051c8ce0db6a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/bitterlemon/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 0df26141d6a2f4c447919dd3398af117a55a85caed6acec8ab6bc03ec8f9aa59
[INFO] running `"docker" "start" "-a" "0df26141d6a2f4c447919dd3398af117a55a85caed6acec8ab6bc03ec8f9aa59"`
[INFO] [stderr]    Compiling random v0.12.2
[INFO] [stderr]    Compiling bitterlemon v0.2.2 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/encode.rs:307:7
[INFO] [stderr]     |
[INFO] [stderr] 307 |         let mut head_run = self.get_mut(*ptr as usize).unwrap();
[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 1.73s
[INFO] running `"docker" "inspect" "0df26141d6a2f4c447919dd3398af117a55a85caed6acec8ab6bc03ec8f9aa59"`
[INFO] running `"docker" "rm" "-f" "0df26141d6a2f4c447919dd3398af117a55a85caed6acec8ab6bc03ec8f9aa59"`
[INFO] [stdout] 0df26141d6a2f4c447919dd3398af117a55a85caed6acec8ab6bc03ec8f9aa59
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/bitterlemon/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 4c935f2a609143109d88ae496b545a128ef29d6d16fa1c11ee3a39bc0980aa97
[INFO] running `"docker" "start" "-a" "4c935f2a609143109d88ae496b545a128ef29d6d16fa1c11ee3a39bc0980aa97"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/bitterlemon-f13d7705b8e92c76
[INFO] [stdout] 
[INFO] [stdout] running 33 tests
[INFO] [stdout] test decode::test_decoder::single_run_clear ... ok
[INFO] [stdout] test decode::test_decoder::single_run_set ... ok
[INFO] [stdout] test decode::test_decoder::two_byte_frame ... ok
[INFO] [stdout] test decode::test_decoder::single_byte_frame ... ok
[INFO] [stdout] test decode::test_decoder::next_none_idempotence ... ok
[INFO] [stdout] test decode::test_decoder::full_byte_frame ... ok
[INFO] [stdout] test encode::run_holding_extensions::single_clear ... ok
[INFO] [stdout] test encode::run_holding_extensions::single_set ... ok
[INFO] [stdout] test encode::test_run_builder::runs ... ok
[INFO] [stdout] test decode::test_decoder::error_on_frame_cutoff ... ok
[INFO] [stdout] test decode::test_decoder::alternate_runs_frames ... ok
[INFO] [stdout] test encode::test_run_builder::next_none_idempotence ... ok
[INFO] [stdout] test decode::test_decoder::empty_input ... ok
[INFO] [stdout] test encode::test_runs::size ... ok
[INFO] [stdout] test encode::test_with_frames::avoid_frame_overflow ... ok
[INFO] [stdout] test encode::test_runs::size_mut ... ok
[INFO] [stdout] test encode::test_with_frames::abandon_frame_on_long_runs ... ok
[INFO] [stdout] test encode::test_with_frames::byte_nearly_filled ... ok
[INFO] [stdout] test encode::test_with_frames::empty_frame ... ok
[INFO] [stdout] test encode::test_with_frames::one_run ... ok
[INFO] [stdout] test encode::test_with_frames::never_create_frame_for_longer_runs ... ok
[INFO] [stdout] test encode::test_with_frames::next_none_idempotence ... ok
[INFO] [stdout] test encode::test_with_frames::one_byte_frame_filled ... ok
[INFO] [stdout] test encode::test_with_frames::two_bytes ... ok
[INFO] [stdout] test encode::test_with_frames::two_runs ... ok
[INFO] [stdout] test encode::test_with_frames::undo_single_byte_frame ... ok
[INFO] [stdout] test encode::test_with_frames::conditional_on_padding ... ok
[INFO] [stdout] test encode::run_holding_extensions::enough_to_overflow_a_frame_to_2_post_header_bytes ... ok
[INFO] [stdout] test encode::run_holding_extensions::empty ... ok
[INFO] [stdout] test encode::run_holding_extensions::can_pack_3_runs_into_a_single_frame_byte ... ok
[INFO] [stdout] test test_encode_round_trip::single_frame ... ok
[INFO] [stdout] test test_encode_round_trip::single_run ... ok
[INFO] [stdout] test test_encode_round_trip::random_kilobyte ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 33 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests bitterlemon
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs -  (line 5) ... 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" "4c935f2a609143109d88ae496b545a128ef29d6d16fa1c11ee3a39bc0980aa97"`
[INFO] running `"docker" "rm" "-f" "4c935f2a609143109d88ae496b545a128ef29d6d16fa1c11ee3a39bc0980aa97"`
[INFO] [stdout] 4c935f2a609143109d88ae496b545a128ef29d6d16fa1c11ee3a39bc0980aa97