[INFO] crate buf-read-ext 0.3.0 is already in cache
[INFO] extracting crate buf-read-ext 0.3.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/buf-read-ext/0.3.0
[INFO] extracting crate buf-read-ext 0.3.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/buf-read-ext/0.3.0
[INFO] validating manifest of buf-read-ext-0.3.0 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 buf-read-ext-0.3.0 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 buf-read-ext-0.3.0
[INFO] finished frobbing buf-read-ext-0.3.0
[INFO] frobbed toml for buf-read-ext-0.3.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/buf-read-ext/0.3.0/Cargo.toml
[INFO] started frobbing buf-read-ext-0.3.0
[INFO] finished frobbing buf-read-ext-0.3.0
[INFO] frobbed toml for buf-read-ext-0.3.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/buf-read-ext/0.3.0/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] testing buf-read-ext-0.3.0 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/buf-read-ext/0.3.0:/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] a212cbcdaf4639ab1a9b3f41811dbbf70d76e3e6c93bc48fba7704fee35a7eb1
[INFO] running `"docker" "start" "-a" "a212cbcdaf4639ab1a9b3f41811dbbf70d76e3e6c93bc48fba7704fee35a7eb1"`
[INFO] [stderr]    Compiling buf-read-ext v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:46:84
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn stream_until_token<R: BufRead + ?Sized, W: Write>(stream: &mut R, token: &[u8], mut out: &mut W)
[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 0.38s
[INFO] running `"docker" "inspect" "a212cbcdaf4639ab1a9b3f41811dbbf70d76e3e6c93bc48fba7704fee35a7eb1"`
[INFO] running `"docker" "rm" "-f" "a212cbcdaf4639ab1a9b3f41811dbbf70d76e3e6c93bc48fba7704fee35a7eb1"`
[INFO] [stdout] a212cbcdaf4639ab1a9b3f41811dbbf70d76e3e6c93bc48fba7704fee35a7eb1
[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/buf-read-ext/0.3.0:/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] aa211a21a67f8ad07b5ec8deead99b45bac2662128a0b8f28cbdfa068dce6523
[INFO] running `"docker" "start" "-a" "aa211a21a67f8ad07b5ec8deead99b45bac2662128a0b8f28cbdfa068dce6523"`
[INFO] [stderr]    Compiling buf-read-ext v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:46:84
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn stream_until_token<R: BufRead + ?Sized, W: Write>(stream: &mut R, token: &[u8], mut out: &mut W)
[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 1.06s
[INFO] running `"docker" "inspect" "aa211a21a67f8ad07b5ec8deead99b45bac2662128a0b8f28cbdfa068dce6523"`
[INFO] running `"docker" "rm" "-f" "aa211a21a67f8ad07b5ec8deead99b45bac2662128a0b8f28cbdfa068dce6523"`
[INFO] [stdout] aa211a21a67f8ad07b5ec8deead99b45bac2662128a0b8f28cbdfa068dce6523
[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/buf-read-ext/0.3.0:/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] 2e11281e6e450b4334828afb9c0551e675715ad8164e69552fe8d09c9706b05d
[INFO] running `"docker" "start" "-a" "2e11281e6e450b4334828afb9c0551e675715ad8164e69552fe8d09c9706b05d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/buf_read_ext-40ee4cbdd667daaa
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test tests::stream_until_token_complex_test ... ok
[INFO] [stdout] test tests::stream_until_token ... ok
[INFO] [stdout] test tests::stream_until_token_double_straddle_test ... ok
[INFO] [stdout] test tests::stream_until_token_large_token_test ... ok
[INFO] [stdout] test tests::stream_until_token_multiple_prefix_test ... ok
[INFO] [stdout] test tests::stream_until_token_straddle_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests buf-read-ext
[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" "2e11281e6e450b4334828afb9c0551e675715ad8164e69552fe8d09c9706b05d"`
[INFO] running `"docker" "rm" "-f" "2e11281e6e450b4334828afb9c0551e675715ad8164e69552fe8d09c9706b05d"`
[INFO] [stdout] 2e11281e6e450b4334828afb9c0551e675715ad8164e69552fe8d09c9706b05d