[INFO] crate mut_guard 0.1.0 is already in cache
[INFO] extracting crate mut_guard 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/mut_guard/0.1.0
[INFO] extracting crate mut_guard 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/mut_guard/0.1.0
[INFO] validating manifest of mut_guard-0.1.0 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 mut_guard-0.1.0 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 mut_guard-0.1.0
[INFO] finished frobbing mut_guard-0.1.0
[INFO] frobbed toml for mut_guard-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/mut_guard/0.1.0/Cargo.toml
[INFO] started frobbing mut_guard-0.1.0
[INFO] finished frobbing mut_guard-0.1.0
[INFO] frobbed toml for mut_guard-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/mut_guard/0.1.0/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing mut_guard-0.1.0 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/mut_guard/0.1.0:/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] e6ea2d47b04c2380fb02c21bf57940d098d79e37cee182f5b7efe1a6adf66cdb
[INFO] running `"docker" "start" "-a" "e6ea2d47b04c2380fb02c21bf57940d098d79e37cee182f5b7efe1a6adf66cdb"`
[INFO] [stderr]    Compiling mut_guard v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:211:12
[INFO] [stderr]     |
[INFO] [stderr] 211 |     f: Box<'a + FnMut(&mut T)>,
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn 'a + FnMut(&mut T)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `"docker" "inspect" "e6ea2d47b04c2380fb02c21bf57940d098d79e37cee182f5b7efe1a6adf66cdb"`
[INFO] running `"docker" "rm" "-f" "e6ea2d47b04c2380fb02c21bf57940d098d79e37cee182f5b7efe1a6adf66cdb"`
[INFO] [stdout] e6ea2d47b04c2380fb02c21bf57940d098d79e37cee182f5b7efe1a6adf66cdb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/mut_guard/0.1.0:/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] 9e16c8b5080935cb17a28f268068bdd9a564efcf42827543e6c3bf69070be627
[INFO] running `"docker" "start" "-a" "9e16c8b5080935cb17a28f268068bdd9a564efcf42827543e6c3bf69070be627"`
[INFO] [stderr]    Compiling mut_guard v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:211:12
[INFO] [stderr]     |
[INFO] [stderr] 211 |     f: Box<'a + FnMut(&mut T)>,
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn 'a + FnMut(&mut T)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `"docker" "inspect" "9e16c8b5080935cb17a28f268068bdd9a564efcf42827543e6c3bf69070be627"`
[INFO] running `"docker" "rm" "-f" "9e16c8b5080935cb17a28f268068bdd9a564efcf42827543e6c3bf69070be627"`
[INFO] [stdout] 9e16c8b5080935cb17a28f268068bdd9a564efcf42827543e6c3bf69070be627
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/mut_guard/0.1.0:/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] 5e3dfa6a5ba33e7053e96856e4e11daa844db64231b8b0fe9edd00428a99d8a6
[INFO] running `"docker" "start" "-a" "5e3dfa6a5ba33e7053e96856e4e11daa844db64231b8b0fe9edd00428a99d8a6"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mut_guard-d420601e5c2bef43
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test tests::count_access ... ok
[INFO] [stdout] test tests::bank ... ok
[INFO] [stdout] test tests::invariant_bank ... ok
[INFO] [stdout] test tests::less_than ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mut_guard
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs -  (line 57) ... ok
[INFO] [stdout] test src/lib.rs -  (line 17) ... ok
[INFO] [stdout] test src/lib.rs -  (line 85) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "5e3dfa6a5ba33e7053e96856e4e11daa844db64231b8b0fe9edd00428a99d8a6"`
[INFO] running `"docker" "rm" "-f" "5e3dfa6a5ba33e7053e96856e4e11daa844db64231b8b0fe9edd00428a99d8a6"`
[INFO] [stdout] 5e3dfa6a5ba33e7053e96856e4e11daa844db64231b8b0fe9edd00428a99d8a6