[INFO] fetching crate buf_redux 0.8.2...
[INFO] extracting crate buf_redux 0.8.2 into work/ex/beta-1.37-6/sources/1.36.0/reg/buf_redux/0.8.2
[INFO] extracting crate buf_redux 0.8.2 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/buf_redux/0.8.2
[INFO] validating manifest of buf_redux-0.8.2 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of buf_redux-0.8.2 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing buf_redux-0.8.2
[INFO] finished frobbing buf_redux-0.8.2
[INFO] frobbed toml for buf_redux-0.8.2 written to work/ex/beta-1.37-6/sources/1.36.0/reg/buf_redux/0.8.2/Cargo.toml
[INFO] started frobbing buf_redux-0.8.2
[INFO] finished frobbing buf_redux-0.8.2
[INFO] frobbed toml for buf_redux-0.8.2 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/buf_redux/0.8.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing buf_redux-0.8.2 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/buf_redux/0.8.2:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 07ef37426190bc3bb6e08bb6982fd70e5ddfb663981add64647a0cb7d31176e1
[INFO] running `"docker" "start" "-a" "07ef37426190bc3bb6e08bb6982fd70e5ddfb663981add64647a0cb7d31176e1"`
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling safemem v0.2.0
[INFO] [stderr]    Compiling slice-deque v0.2.4
[INFO] [stderr]    Compiling buf_redux v0.8.2 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/lib.rs:1049:17
[INFO] [stderr]      |
[INFO] [stderr] 1049 |             let mut buf = unsafe { self.buf.write_buf() };
[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: variable does not need to be mutable
[INFO] [stderr]     --> src/lib.rs:1067:17
[INFO] [stderr]      |
[INFO] [stderr] 1067 |             let mut buf = self.buf.write_buf();
[INFO] [stderr]      |                 ----^^^
[INFO] [stderr]      |                 |
[INFO] [stderr]      |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.61s
[INFO] running `"docker" "inspect" "07ef37426190bc3bb6e08bb6982fd70e5ddfb663981add64647a0cb7d31176e1"`
[INFO] running `"docker" "rm" "-f" "07ef37426190bc3bb6e08bb6982fd70e5ddfb663981add64647a0cb7d31176e1"`
[INFO] [stdout] 07ef37426190bc3bb6e08bb6982fd70e5ddfb663981add64647a0cb7d31176e1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/buf_redux/0.8.2:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 048f780199f3a8180834cdf657b6da105f9463cd0f7b8b356f55114fdb7b9803
[INFO] running `"docker" "start" "-a" "048f780199f3a8180834cdf657b6da105f9463cd0f7b8b356f55114fdb7b9803"`
[INFO] [stderr]    Compiling buf_redux v0.8.2 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/lib.rs:1049:17
[INFO] [stderr]      |
[INFO] [stderr] 1049 |             let mut buf = unsafe { self.buf.write_buf() };
[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: variable does not need to be mutable
[INFO] [stderr]     --> src/lib.rs:1067:17
[INFO] [stderr]      |
[INFO] [stderr] 1067 |             let mut buf = self.buf.write_buf();
[INFO] [stderr]      |                 ----^^^
[INFO] [stderr]      |                 |
[INFO] [stderr]      |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.92s
[INFO] running `"docker" "inspect" "048f780199f3a8180834cdf657b6da105f9463cd0f7b8b356f55114fdb7b9803"`
[INFO] running `"docker" "rm" "-f" "048f780199f3a8180834cdf657b6da105f9463cd0f7b8b356f55114fdb7b9803"`
[INFO] [stdout] 048f780199f3a8180834cdf657b6da105f9463cd0f7b8b356f55114fdb7b9803
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/buf_redux/0.8.2:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] bf1fdf72513f09c392e9ee4aa4a936189f96300a44db1aa402efd4faa77aea6d
[INFO] running `"docker" "start" "-a" "bf1fdf72513f09c392e9ee4aa4a936189f96300a44db1aa402efd4faa77aea6d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/buf_redux-8c7ab9f724b98af4
[INFO] [stdout] 
[INFO] [stdout] running 29 tests
[INFO] [stdout] test buffer::std_buf::read_into_full ... ok
[INFO] [stdout] test policy::test::test_min_buffered ... ok
[INFO] [stdout] test policy::test::test_flush_exact ... ok
[INFO] [stdout] test policy::test::test_flush_on_newline ... ok
[INFO] [stdout] test policy::test::test_flush_on ... ok
[INFO] [stdout] test ringbuf_tests::test_buffer_new ... ok
[INFO] [stdout] test ringbuf_tests::issue_8 ... ok
[INFO] [stdout] test ringbuf_tests::test_buffer_with_cap ... ok
[INFO] [stdout] test ringbuf_tests::test_buffered_reader ... ok
[INFO] [stdout] test ringbuf_tests::test_lines ... ok
[INFO] [stdout] test ringbuf_tests::test_read_until ... ok
[INFO] [stdout] test ringbuf_tests::test_read_line ... ok
[INFO] [stdout] test ringbuf_tests::test_mirror_boundary ... ok
[INFO] [stdout] test ringbuf_tests::test_buffered_reader_seek_underflow ... ok
[INFO] [stdout] test ringbuf_tests::test_short_reads ... ok
[INFO] [stdout] test std_tests::test_buf_writer_drops_once ... ok
[INFO] [stdout] test ringbuf_tests::test_buffered_reader_seek ... ok
[INFO] [stdout] test std_tests::test_buffered_reader ... ok
[INFO] [stdout] test std_tests::test_buffered_reader_seek ... ok
[INFO] [stdout] test std_tests::test_buffered_reader_seek_underflow ... ok
[INFO] [stdout] test std_tests::test_buffered_writer ... ok
[INFO] [stdout] test std_tests::test_buffered_writer_inner_flushes ... ok
[INFO] [stdout] test std_tests::test_buffered_writer_seek ... ok
[INFO] [stdout] test std_tests::test_line_buffer ... ok
[INFO] [stdout] test std_tests::test_lines ... ok
[INFO] [stdout] test std_tests::test_read_line ... ok
[INFO] [stdout] test std_tests::test_read_until ... ok
[INFO] [stdout] test std_tests::test_short_reads ... ok
[INFO] [stdout] test policy::test::test_flush_at_least ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 29 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests buf_redux
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/policy.rs - policy::MinBuffered (line 78) ... 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" "bf1fdf72513f09c392e9ee4aa4a936189f96300a44db1aa402efd4faa77aea6d"`
[INFO] running `"docker" "rm" "-f" "bf1fdf72513f09c392e9ee4aa4a936189f96300a44db1aa402efd4faa77aea6d"`
[INFO] [stdout] bf1fdf72513f09c392e9ee4aa4a936189f96300a44db1aa402efd4faa77aea6d