[INFO] crate jobsteal 0.5.1 is already in cache
[INFO] extracting crate jobsteal 0.5.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/jobsteal/0.5.1
[INFO] extracting crate jobsteal 0.5.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/jobsteal/0.5.1
[INFO] validating manifest of jobsteal-0.5.1 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 jobsteal-0.5.1 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 jobsteal-0.5.1
[INFO] finished frobbing jobsteal-0.5.1
[INFO] frobbed toml for jobsteal-0.5.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/jobsteal/0.5.1/Cargo.toml
[INFO] started frobbing jobsteal-0.5.1
[INFO] finished frobbing jobsteal-0.5.1
[INFO] frobbed toml for jobsteal-0.5.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/jobsteal/0.5.1/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 jobsteal-0.5.1 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-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/jobsteal/0.5.1:/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] f47dfaa6244286c1a885efae11011c3259bcd40909126ea7d45e3247784500b8
[INFO] running `"docker" "start" "-a" "f47dfaa6244286c1a885efae11011c3259bcd40909126ea7d45e3247784500b8"`
[INFO] [stderr]    Compiling jobsteal v0.5.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/arena.rs:62:13
[INFO] [stderr]    |
[INFO] [stderr] 62 |         let mut buf = self.buf.get();
[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 1.83s
[INFO] running `"docker" "inspect" "f47dfaa6244286c1a885efae11011c3259bcd40909126ea7d45e3247784500b8"`
[INFO] running `"docker" "rm" "-f" "f47dfaa6244286c1a885efae11011c3259bcd40909126ea7d45e3247784500b8"`
[INFO] [stdout] f47dfaa6244286c1a885efae11011c3259bcd40909126ea7d45e3247784500b8
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/jobsteal/0.5.1:/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] a9f2212de5b3025b57e262bfbca5514a983699284c36487730efb6892481da48
[INFO] running `"docker" "start" "-a" "a9f2212de5b3025b57e262bfbca5514a983699284c36487730efb6892481da48"`
[INFO] [stderr]    Compiling jobsteal v0.5.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/arena.rs:62:13
[INFO] [stderr]    |
[INFO] [stderr] 62 |         let mut buf = self.buf.get();
[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 3.05s
[INFO] running `"docker" "inspect" "a9f2212de5b3025b57e262bfbca5514a983699284c36487730efb6892481da48"`
[INFO] running `"docker" "rm" "-f" "a9f2212de5b3025b57e262bfbca5514a983699284c36487730efb6892481da48"`
[INFO] [stdout] a9f2212de5b3025b57e262bfbca5514a983699284c36487730efb6892481da48
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/jobsteal/0.5.1:/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] 823cc7c3477b826809455424cf06b5954e56ad1bc7f81ed317ad2f189d6a9147
[INFO] running `"docker" "start" "-a" "823cc7c3477b826809455424cf06b5954e56ad1bc7f81ed317ad2f189d6a9147"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/jobsteal-b0436a0c6a126728
[INFO] [stdout] 
[INFO] [stdout] running 18 tests
[INFO] [stdout] test iter::filter::tests::filter_basics ... ok
[INFO] [stdout] test iter::fold::tests::fold_adding ... ok
[INFO] [stdout] test iter::vec::tests::it_works ... ok
[INFO] [stdout] test iter::tests::doubling ... ok
[INFO] [stdout] test iter::all_any::tests::all_even ... ok
[INFO] [stdout] test iter::all_any::tests::any_even ... ok
[INFO] [stdout] test iter::collect::tests::collect_basics ... ok
[INFO] [stdout] test tests::job_panic ... ok
[INFO] [stdout] test iter::flat_map::tests::flat_map_basics ... ok
[INFO] [stdout] test iter::enumerate::tests::enumerate_basics ... ok
[INFO] [stdout] test tests::join_scoping ... ok
[INFO] [stdout] test tests::creation_destruction ... ok
[INFO] [stdout] test tests::join ... ok
[INFO] [stdout] test tests::outlives_pool ... ok
[INFO] [stdout] test tests::scope_return ... ok
[INFO] [stdout] test tests::multilevel_scoping ... ok
[INFO] [stdout] test tests::submit_large_jobs ... ok
[INFO] [stdout] test tests::split_work ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 18 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests jobsteal
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test src/lib.rs - Spawner::submit (line 116) ... ok
[INFO] [stdout] test src/lib.rs - Spawner::scope (line 147) ... ok
[INFO] [stdout] test src/lib.rs - Spawner::recurse (line 59) ... ok
[INFO] [stdout] test src/iter/mod.rs - iter (line 13) ... ok
[INFO] [stdout] test src/lib.rs - Spawner::join (line 177) ... 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" "823cc7c3477b826809455424cf06b5954e56ad1bc7f81ed317ad2f189d6a9147"`
[INFO] running `"docker" "rm" "-f" "823cc7c3477b826809455424cf06b5954e56ad1bc7f81ed317ad2f189d6a9147"`
[INFO] [stdout] 823cc7c3477b826809455424cf06b5954e56ad1bc7f81ed317ad2f189d6a9147