[INFO] crate middleman 0.3.1 is already in cache
[INFO] extracting crate middleman 0.3.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/middleman/0.3.1
[INFO] extracting crate middleman 0.3.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/middleman/0.3.1
[INFO] validating manifest of middleman-0.3.1 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 middleman-0.3.1 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 middleman-0.3.1
[INFO] finished frobbing middleman-0.3.1
[INFO] frobbed toml for middleman-0.3.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/middleman/0.3.1/Cargo.toml
[INFO] started frobbing middleman-0.3.1
[INFO] finished frobbing middleman-0.3.1
[INFO] frobbed toml for middleman-0.3.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/middleman/0.3.1/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 middleman-0.3.1 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/middleman/0.3.1:/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] b6eb4729d7c30a341c1d13748b78f48567d9c2f2f54637a4df54f2d5acc770c8
[INFO] running `"docker" "start" "-a" "b6eb4729d7c30a341c1d13748b78f48567d9c2f2f54637a4df54f2d5acc770c8"`
[INFO] [stderr]    Compiling middleman v0.3.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/structs.rs:313:18
[INFO] [stderr]     |
[INFO] [stderr] 313 |                 let mut vec = self.buf.drain(0..buf_end)
[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 0.62s
[INFO] running `"docker" "inspect" "b6eb4729d7c30a341c1d13748b78f48567d9c2f2f54637a4df54f2d5acc770c8"`
[INFO] running `"docker" "rm" "-f" "b6eb4729d7c30a341c1d13748b78f48567d9c2f2f54637a4df54f2d5acc770c8"`
[INFO] [stdout] b6eb4729d7c30a341c1d13748b78f48567d9c2f2f54637a4df54f2d5acc770c8
[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/middleman/0.3.1:/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] 25ba14e6359ac398dfb52b2eb017d7f568faf8e80cc2e268cf56a6075263fce8
[INFO] running `"docker" "start" "-a" "25ba14e6359ac398dfb52b2eb017d7f568faf8e80cc2e268cf56a6075263fce8"`
[INFO] [stderr]    Compiling middleman v0.3.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/structs.rs:313:18
[INFO] [stderr]     |
[INFO] [stderr] 313 |                 let mut vec = self.buf.drain(0..buf_end)
[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/tests.rs:532:41
[INFO] [stderr]     |
[INFO] [stderr] 532 |                                     let mut stream = streams.get_mut(&token).unwrap();
[INFO] [stderr]     |                                         ----^^^^^^
[INFO] [stderr]     |                                         |
[INFO] [stderr]     |                                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` in tuple element 1 that must be used
[INFO] [stderr]    --> src/tests.rs:226:28
[INFO] [stderr]     |
[INFO] [stderr] 226 |                 TOK_A => { a.recv_all_map(&mut work); },
[INFO] [stderr]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` in tuple element 1 that must be used
[INFO] [stderr]    --> src/tests.rs:227:28
[INFO] [stderr]     |
[INFO] [stderr] 227 |                 TOK_B => { b.recv_all_map(&mut work); },
[INFO] [stderr]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` in tuple element 1 that must be used
[INFO] [stderr]    --> src/tests.rs:344:13
[INFO] [stderr]     |
[INFO] [stderr] 344 | /             a.recv_all_map::<_, Complex>(|_mm, msg| {
[INFO] [stderr] 345 | |                 assert_eq!(&msg, &struct_form);
[INFO] [stderr] 346 | |                 to_go -= 1;
[INFO] [stderr] 347 | |             });
[INFO] [stderr]     | |_______________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.20s
[INFO] running `"docker" "inspect" "25ba14e6359ac398dfb52b2eb017d7f568faf8e80cc2e268cf56a6075263fce8"`
[INFO] running `"docker" "rm" "-f" "25ba14e6359ac398dfb52b2eb017d7f568faf8e80cc2e268cf56a6075263fce8"`
[INFO] [stdout] 25ba14e6359ac398dfb52b2eb017d7f568faf8e80cc2e268cf56a6075263fce8
[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/middleman/0.3.1:/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] 12c165c29d11a6f0ce220b60cfe95e72679ad94e8f48d4c0d6728df6331f0845
[INFO] running `"docker" "start" "-a" "12c165c29d11a6f0ce220b60cfe95e72679ad94e8f48d4c0d6728df6331f0845"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/middleman-396fdd51b8957ae5
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test tests::count_together ... ok
[INFO] [stdout] test tests::not_ready ... FAILED
[INFO] [stdout] test tests::echo_client_std ... ok
[INFO] [stdout] test tests::recv_blocking ... ok
[INFO] [stdout] test tests::single_send_recv ... ok
[INFO] [stdout] test tests::simple_packed ... ok
[INFO] [stdout] test tests::safe_echo_client ... ok
[INFO] [stdout] test tests::is_ready ... ok
[INFO] [stdout] test tests::send_a_lot ... ok
[INFO] [stdout] test tests::packed_best_case ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     tests::not_ready
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 9 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--lib'
[INFO] running `"docker" "inspect" "12c165c29d11a6f0ce220b60cfe95e72679ad94e8f48d4c0d6728df6331f0845"`
[INFO] running `"docker" "rm" "-f" "12c165c29d11a6f0ce220b60cfe95e72679ad94e8f48d4c0d6728df6331f0845"`
[INFO] [stdout] 12c165c29d11a6f0ce220b60cfe95e72679ad94e8f48d4c0d6728df6331f0845