[INFO] crate middleman 0.3.1 is already in cache
[INFO] extracting crate middleman 0.3.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/middleman/0.3.1
[INFO] extracting crate middleman 0.3.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/middleman/0.3.1
[INFO] validating manifest of middleman-0.3.1 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 middleman-0.3.1 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 middleman-0.3.1
[INFO] finished frobbing middleman-0.3.1
[INFO] frobbed toml for middleman-0.3.1 written to work/ex/beta-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/reg/middleman/0.3.1/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 middleman-0.3.1 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-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 491bcbf9a40a6b8af9ee0f60ad1b8d0d580d097fea53e2972b4ece9b4e97bbb1
[INFO] running `"docker" "start" "-a" "491bcbf9a40a6b8af9ee0f60ad1b8d0d580d097fea53e2972b4ece9b4e97bbb1"`
[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 0.52s
[INFO] running `"docker" "inspect" "491bcbf9a40a6b8af9ee0f60ad1b8d0d580d097fea53e2972b4ece9b4e97bbb1"`
[INFO] running `"docker" "rm" "-f" "491bcbf9a40a6b8af9ee0f60ad1b8d0d580d097fea53e2972b4ece9b4e97bbb1"`
[INFO] [stdout] 491bcbf9a40a6b8af9ee0f60ad1b8d0d580d097fea53e2972b4ece9b4e97bbb1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 234e547eb44f8b05b909479db313b1ac0de800398278769a604304c274aecb9c
[INFO] running `"docker" "start" "-a" "234e547eb44f8b05b909479db313b1ac0de800398278769a604304c274aecb9c"`
[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]     Finished dev [unoptimized + debuginfo] target(s) in 2.50s
[INFO] running `"docker" "inspect" "234e547eb44f8b05b909479db313b1ac0de800398278769a604304c274aecb9c"`
[INFO] running `"docker" "rm" "-f" "234e547eb44f8b05b909479db313b1ac0de800398278769a604304c274aecb9c"`
[INFO] [stdout] 234e547eb44f8b05b909479db313b1ac0de800398278769a604304c274aecb9c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] b688b8e653045e8c04dae1e5161be962e842f1f194cbb76301032905760754a9
[INFO] running `"docker" "start" "-a" "b688b8e653045e8c04dae1e5161be962e842f1f194cbb76301032905760754a9"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/middleman-09acb507b8c7fce9
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test tests::echo_client_std ... ok
[INFO] [stdout] test tests::count_together ... ok
[INFO] [stdout] test tests::not_ready ... FAILED
[INFO] [stdout] test tests::recv_blocking ... 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::single_send_recv ... ok
[INFO] [stdout] test tests::send_a_lot ... ok
[INFO] [stderr] thread '<unnamed>' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 104, kind: ConnectionReset, message: "Connection reset by peer" }', src/libcore/result.rs:999:5
[INFO] [stderr] stack backtrace:
[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" "b688b8e653045e8c04dae1e5161be962e842f1f194cbb76301032905760754a9"`
[INFO] running `"docker" "rm" "-f" "b688b8e653045e8c04dae1e5161be962e842f1f194cbb76301032905760754a9"`
[INFO] [stdout] b688b8e653045e8c04dae1e5161be962e842f1f194cbb76301032905760754a9