[INFO] crate thread_io 0.2.0 is already in cache
[INFO] testing thread_io-0.2.0 against beta-2019-09-28 for beta-1.39-1
[INFO] extracting crate thread_io 0.2.0 into work/builds/worker-9/source
[INFO] validating manifest of crates.io crate thread_io 0.2.0 on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate thread_io 0.2.0
[INFO] finished tweaking crates.io crate thread_io 0.2.0
[INFO] tweaked toml for crates.io crate thread_io 0.2.0 written to work/builds/worker-9/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] fc2e4bf5a5eab9adef12534e4cd14589702e565847d71a2443370f28bf2aa003
[INFO] running `"docker" "start" "-a" "fc2e4bf5a5eab9adef12534e4cd14589702e565847d71a2443370f28bf2aa003"`
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling crossbeam-deque v0.6.3
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling crossbeam v0.6.0
[INFO] [stderr]    Compiling thread_io v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.33s
[INFO] running `"docker" "inspect" "fc2e4bf5a5eab9adef12534e4cd14589702e565847d71a2443370f28bf2aa003"`
[INFO] running `"docker" "rm" "-f" "fc2e4bf5a5eab9adef12534e4cd14589702e565847d71a2443370f28bf2aa003"`
[INFO] [stdout] fc2e4bf5a5eab9adef12534e4cd14589702e565847d71a2443370f28bf2aa003
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] 45287543a277441aad1951a11a2212e5d3c74bff0a166222bf03c2553a24d895
[INFO] running `"docker" "start" "-a" "45287543a277441aad1951a11a2212e5d3c74bff0a166222bf03c2553a24d895"`
[INFO] [stderr]    Compiling thread_io v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/read.rs:64:25
[INFO] [stderr]    |
[INFO] [stderr] 64 |                     let mut rdr = Reader::new(text, rdr_block_size, ::std::usize::MAX);
[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]   --> tests/read.rs:68:25
[INFO] [stderr]    |
[INFO] [stderr] 68 |                     let mut rdr = Reader::new(text, rdr_block_size, ::std::usize::MAX);
[INFO] [stderr]    |                         ----^^^
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/read.rs:94:17
[INFO] [stderr]    |
[INFO] [stderr] 94 |             let mut rdr = Reader::new(text, channel_bufsize, len / channel_bufsize);
[INFO] [stderr]    |                 ----^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/write.rs:61:21
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 let mut w = writer_init_finish(
[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 1.10s
[INFO] running `"docker" "inspect" "45287543a277441aad1951a11a2212e5d3c74bff0a166222bf03c2553a24d895"`
[INFO] running `"docker" "rm" "-f" "45287543a277441aad1951a11a2212e5d3c74bff0a166222bf03c2553a24d895"`
[INFO] [stdout] 45287543a277441aad1951a11a2212e5d3c74bff0a166222bf03c2553a24d895
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen"`
[INFO] [stdout] 3318488eb17dabf378edd39c434798b373307e5392fc472790851ab8cae6a92a
[INFO] running `"docker" "start" "-a" "3318488eb17dabf378edd39c434798b373307e5392fc472790851ab8cae6a92a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/thread_io-e1a65e6d0588bd77
[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]      Running /opt/rustwide/target/debug/deps/read-ee0395235ac8d760
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test reader_init_fail ... ok
[INFO] [stdout] test read_fail ... ok
[INFO] [stdout] test read ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/write-e069c85e3cf855bd
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test writer_init_fail ... ok
[INFO] [stdout] test write_fail ... ok
[INFO] [stdout] test write_thread ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests thread_io
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test src/write.rs - write::writer_finish (line 226) ... ok
[INFO] [stdout] test src/read.rs - read::reader_init (line 216) ... ok
[INFO] [stdout] test src/write.rs - write::writer_init (line 188) ... ok
[INFO] [stdout] test src/write.rs - write::writer (line 161) ... ok
[INFO] [stdout] test src/read.rs - read::reader (line 189) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "3318488eb17dabf378edd39c434798b373307e5392fc472790851ab8cae6a92a"`
[INFO] running `"docker" "rm" "-f" "3318488eb17dabf378edd39c434798b373307e5392fc472790851ab8cae6a92a"`
[INFO] [stdout] 3318488eb17dabf378edd39c434798b373307e5392fc472790851ab8cae6a92a