[INFO] updating cached repository peterdelevoryas/io-state-machine-prototype4
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/peterdelevoryas/io-state-machine-prototype4
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/peterdelevoryas/io-state-machine-prototype4" "work/ex/beta-1.38-1/sources/1.37.0/gh/peterdelevoryas/io-state-machine-prototype4"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/peterdelevoryas/io-state-machine-prototype4'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/peterdelevoryas/io-state-machine-prototype4" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/peterdelevoryas/io-state-machine-prototype4"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/peterdelevoryas/io-state-machine-prototype4'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 59a8fe24ee6aff714d9dfac6abb54d62b80735f4
[INFO] sha for GitHub repo peterdelevoryas/io-state-machine-prototype4: 59a8fe24ee6aff714d9dfac6abb54d62b80735f4
[INFO] validating manifest of peterdelevoryas/io-state-machine-prototype4 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 peterdelevoryas/io-state-machine-prototype4 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 peterdelevoryas/io-state-machine-prototype4
[INFO] finished frobbing peterdelevoryas/io-state-machine-prototype4
[INFO] frobbed toml for peterdelevoryas/io-state-machine-prototype4 written to work/ex/beta-1.38-1/sources/1.37.0/gh/peterdelevoryas/io-state-machine-prototype4/Cargo.toml
[INFO] started frobbing peterdelevoryas/io-state-machine-prototype4
[INFO] finished frobbing peterdelevoryas/io-state-machine-prototype4
[INFO] frobbed toml for peterdelevoryas/io-state-machine-prototype4 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/peterdelevoryas/io-state-machine-prototype4/Cargo.toml
[INFO] crate peterdelevoryas/io-state-machine-prototype4 already has a lockfile, it will not be regenerated
[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 peterdelevoryas/io-state-machine-prototype4 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/gh/peterdelevoryas/io-state-machine-prototype4:/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] 4b1686993bf4f4fe3fb91257af9051e27ec583c7d5a2d4894c4c9eee1b9376c7
[INFO] running `"docker" "start" "-a" "4b1686993bf4f4fe3fb91257af9051e27ec583c7d5a2d4894c4c9eee1b9376c7"`
[INFO] [stderr]    Compiling net2 v0.2.26
[INFO] [stderr]    Compiling nix v0.7.0
[INFO] [stderr]    Compiling mio v0.6.2
[INFO] [stderr]    Compiling io-state-machine-prototype4 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:27:76
[INFO] [stderr]    |
[INFO] [stderr] 27 |            not_started: &mut VecDeque<usize>) -> TaskStatus<Result<(), Box<error::Error>>>
[INFO] [stderr]    |                                                                            ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:111:28
[INFO] [stderr]     |
[INFO] [stderr] 111 | fn run() -> Result<(), Box<error::Error>> {
[INFO] [stderr]     |                            ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/main.rs:187:5
[INFO] [stderr]     |
[INFO] [stderr] 187 |     return Ok(())
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unreachable_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/main.rs:140:47
[INFO] [stderr]     |
[INFO] [stderr] 140 |                 Task::Conn { conn_slab_index: i } => {
[INFO] [stderr]     |                                               ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `result`
[INFO] [stderr]    --> src/main.rs:148:34
[INFO] [stderr]     |
[INFO] [stderr] 148 |                 TaskStatus::Done(result) => {
[INFO] [stderr]     |                                  ^^^^^^ help: consider prefixing with an underscore: `_result`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/main.rs:167:47
[INFO] [stderr]     |
[INFO] [stderr] 167 |                 Task::Conn { conn_slab_index: i } => {
[INFO] [stderr]     |                                               ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `result`
[INFO] [stderr]    --> src/main.rs:175:34
[INFO] [stderr]     |
[INFO] [stderr] 175 |                 TaskStatus::Done(result) => {
[INFO] [stderr]     |                                  ^^^^^^ help: consider prefixing with an underscore: `_result`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ready`
[INFO] [stderr]   --> src/main.rs:23:12
[INFO] [stderr]    |
[INFO] [stderr] 23 |            ready: mio::Ready,
[INFO] [stderr]    |            ^^^^^ help: consider prefixing with an underscore: `_ready`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `KineticRequest`
[INFO] [stderr]    --> src/main.rs:108:5
[INFO] [stderr]     |
[INFO] [stderr] 108 |     KineticRequest,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.48s
[INFO] running `"docker" "inspect" "4b1686993bf4f4fe3fb91257af9051e27ec583c7d5a2d4894c4c9eee1b9376c7"`
[INFO] running `"docker" "rm" "-f" "4b1686993bf4f4fe3fb91257af9051e27ec583c7d5a2d4894c4c9eee1b9376c7"`
[INFO] [stdout] 4b1686993bf4f4fe3fb91257af9051e27ec583c7d5a2d4894c4c9eee1b9376c7
[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/gh/peterdelevoryas/io-state-machine-prototype4:/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] 4bc9c99dfc4eaea05f554bd9109b649db59d53c87c65a58a04e358a13c6d4ddd
[INFO] running `"docker" "start" "-a" "4bc9c99dfc4eaea05f554bd9109b649db59d53c87c65a58a04e358a13c6d4ddd"`
[INFO] [stderr]    Compiling io-state-machine-prototype4 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:27:76
[INFO] [stderr]    |
[INFO] [stderr] 27 |            not_started: &mut VecDeque<usize>) -> TaskStatus<Result<(), Box<error::Error>>>
[INFO] [stderr]    |                                                                            ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:111:28
[INFO] [stderr]     |
[INFO] [stderr] 111 | fn run() -> Result<(), Box<error::Error>> {
[INFO] [stderr]     |                            ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/main.rs:187:5
[INFO] [stderr]     |
[INFO] [stderr] 187 |     return Ok(())
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unreachable_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/main.rs:140:47
[INFO] [stderr]     |
[INFO] [stderr] 140 |                 Task::Conn { conn_slab_index: i } => {
[INFO] [stderr]     |                                               ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `result`
[INFO] [stderr]    --> src/main.rs:148:34
[INFO] [stderr]     |
[INFO] [stderr] 148 |                 TaskStatus::Done(result) => {
[INFO] [stderr]     |                                  ^^^^^^ help: consider prefixing with an underscore: `_result`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/main.rs:167:47
[INFO] [stderr]     |
[INFO] [stderr] 167 |                 Task::Conn { conn_slab_index: i } => {
[INFO] [stderr]     |                                               ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `result`
[INFO] [stderr]    --> src/main.rs:175:34
[INFO] [stderr]     |
[INFO] [stderr] 175 |                 TaskStatus::Done(result) => {
[INFO] [stderr]     |                                  ^^^^^^ help: consider prefixing with an underscore: `_result`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ready`
[INFO] [stderr]   --> src/main.rs:23:12
[INFO] [stderr]    |
[INFO] [stderr] 23 |            ready: mio::Ready,
[INFO] [stderr]    |            ^^^^^ help: consider prefixing with an underscore: `_ready`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `KineticRequest`
[INFO] [stderr]    --> src/main.rs:108:5
[INFO] [stderr]     |
[INFO] [stderr] 108 |     KineticRequest,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
[INFO] running `"docker" "inspect" "4bc9c99dfc4eaea05f554bd9109b649db59d53c87c65a58a04e358a13c6d4ddd"`
[INFO] running `"docker" "rm" "-f" "4bc9c99dfc4eaea05f554bd9109b649db59d53c87c65a58a04e358a13c6d4ddd"`
[INFO] [stdout] 4bc9c99dfc4eaea05f554bd9109b649db59d53c87c65a58a04e358a13c6d4ddd
[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/gh/peterdelevoryas/io-state-machine-prototype4:/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] f7b87acfef5b8e06c07593a2338365133b032819995286bfa29f1be0e4605cd9
[INFO] running `"docker" "start" "-a" "f7b87acfef5b8e06c07593a2338365133b032819995286bfa29f1be0e4605cd9"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.20s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/io_state_machine_prototype4-bc3a5e5edc872ea0
[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" "f7b87acfef5b8e06c07593a2338365133b032819995286bfa29f1be0e4605cd9"`
[INFO] running `"docker" "rm" "-f" "f7b87acfef5b8e06c07593a2338365133b032819995286bfa29f1be0e4605cd9"`
[INFO] [stdout] f7b87acfef5b8e06c07593a2338365133b032819995286bfa29f1be0e4605cd9