[INFO] crate pubsub 0.2.3 is already in cache
[INFO] extracting crate pubsub 0.2.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/pubsub/0.2.3
[INFO] extracting crate pubsub 0.2.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/pubsub/0.2.3
[INFO] validating manifest of pubsub-0.2.3 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 pubsub-0.2.3 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 pubsub-0.2.3
[INFO] finished frobbing pubsub-0.2.3
[INFO] frobbed toml for pubsub-0.2.3 written to work/ex/beta-1.38-1/sources/1.37.0/reg/pubsub/0.2.3/Cargo.toml
[INFO] started frobbing pubsub-0.2.3
[INFO] finished frobbing pubsub-0.2.3
[INFO] frobbed toml for pubsub-0.2.3 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/pubsub/0.2.3/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing pubsub-0.2.3 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/pubsub/0.2.3:/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] 79befd43b705f77239ac419d6ffc520fa8ee95de5ecd29ff939d9059ba896c7d
[INFO] running `"docker" "start" "-a" "79befd43b705f77239ac419d6ffc520fa8ee95de5ecd29ff939d9059ba896c7d"`
[INFO] [stderr]    Compiling threadpool v0.1.4
[INFO] [stderr]    Compiling pubsub v0.2.3 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:52:29
[INFO] [stderr]    |
[INFO] [stderr] 52 |     func: Option<Arc<Mutex<Box<FnMut(String) + Send>>>>
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(String) + Send`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:192:10
[INFO] [stderr]     |
[INFO] [stderr] 192 |                     let mut func = guard.deref_mut();
[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 1.18s
[INFO] running `"docker" "inspect" "79befd43b705f77239ac419d6ffc520fa8ee95de5ecd29ff939d9059ba896c7d"`
[INFO] running `"docker" "rm" "-f" "79befd43b705f77239ac419d6ffc520fa8ee95de5ecd29ff939d9059ba896c7d"`
[INFO] [stdout] 79befd43b705f77239ac419d6ffc520fa8ee95de5ecd29ff939d9059ba896c7d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/pubsub/0.2.3:/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] 275ceb69be102bd71e92be070dd8a37d5bd4d2ce16629f08988ae90fffe1cb1c
[INFO] running `"docker" "start" "-a" "275ceb69be102bd71e92be070dd8a37d5bd4d2ce16629f08988ae90fffe1cb1c"`
[INFO] [stderr]    Compiling pubsub v0.2.3 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:52:29
[INFO] [stderr]    |
[INFO] [stderr] 52 |     func: Option<Arc<Mutex<Box<FnMut(String) + Send>>>>
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(String) + Send`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:192:10
[INFO] [stderr]     |
[INFO] [stderr] 192 |                     let mut func = guard.deref_mut();
[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 1.37s
[INFO] running `"docker" "inspect" "275ceb69be102bd71e92be070dd8a37d5bd4d2ce16629f08988ae90fffe1cb1c"`
[INFO] running `"docker" "rm" "-f" "275ceb69be102bd71e92be070dd8a37d5bd4d2ce16629f08988ae90fffe1cb1c"`
[INFO] [stdout] 275ceb69be102bd71e92be070dd8a37d5bd4d2ce16629f08988ae90fffe1cb1c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/pubsub/0.2.3:/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] 41cc6a2713f212930e5f363df9cc6308e8f932ab73e28f428c672d7916b99e8a
[INFO] running `"docker" "start" "-a" "41cc6a2713f212930e5f363df9cc6308e8f932ab73e28f428c672d7916b99e8a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/pubsub-22579c18c06f4360
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test test::lazy_subscribe ... ok
[INFO] [stdout] test test::notify_exception ... ok
[INFO] [stderr]    Doc-tests pubsub
[INFO] [stdout] test test::basic_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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] running `"docker" "inspect" "41cc6a2713f212930e5f363df9cc6308e8f932ab73e28f428c672d7916b99e8a"`
[INFO] running `"docker" "rm" "-f" "41cc6a2713f212930e5f363df9cc6308e8f932ab73e28f428c672d7916b99e8a"`
[INFO] [stdout] 41cc6a2713f212930e5f363df9cc6308e8f932ab73e28f428c672d7916b99e8a