[INFO] crate funfun 0.2.4 is already in cache
[INFO] extracting crate funfun 0.2.4 into work/ex/beta-1.38-1/sources/1.37.0/reg/funfun/0.2.4
[INFO] extracting crate funfun 0.2.4 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/funfun/0.2.4
[INFO] validating manifest of funfun-0.2.4 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 funfun-0.2.4 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 funfun-0.2.4
[INFO] finished frobbing funfun-0.2.4
[INFO] frobbed toml for funfun-0.2.4 written to work/ex/beta-1.38-1/sources/1.37.0/reg/funfun/0.2.4/Cargo.toml
[INFO] started frobbing funfun-0.2.4
[INFO] finished frobbing funfun-0.2.4
[INFO] frobbed toml for funfun-0.2.4 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/funfun/0.2.4/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] testing funfun-0.2.4 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/funfun/0.2.4:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 036482ef875cc6ed9317221b7c9bb703ef3863f279cb9ff749b3d894454e5a9c
[INFO] running `"docker" "start" "-a" "036482ef875cc6ed9317221b7c9bb703ef3863f279cb9ff749b3d894454e5a9c"`
[INFO] [stderr]    Compiling funfun v0.2.4 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/lib.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `"docker" "inspect" "036482ef875cc6ed9317221b7c9bb703ef3863f279cb9ff749b3d894454e5a9c"`
[INFO] running `"docker" "rm" "-f" "036482ef875cc6ed9317221b7c9bb703ef3863f279cb9ff749b3d894454e5a9c"`
[INFO] [stdout] 036482ef875cc6ed9317221b7c9bb703ef3863f279cb9ff749b3d894454e5a9c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/funfun/0.2.4:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] a6bdd1e07b197b49e5ddc04d562638fd363e579cc55b86048442e4de959da399
[INFO] running `"docker" "start" "-a" "a6bdd1e07b197b49e5ddc04d562638fd363e579cc55b86048442e4de959da399"`
[INFO] [stderr]    Compiling funfun v0.2.4 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/lib.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:93:24
[INFO] [stderr]    |
[INFO] [stderr] 93 |         type T = BoxFn<Fn(&str) -> String>;
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&str) -> String`
[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/lib.rs:115:24
[INFO] [stderr]     |
[INFO] [stderr] 115 |         type T = ArcFn<Fn(&str) -> String>;
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&str) -> String`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]    --> src/lib.rs:104:14
[INFO] [stderr]     |
[INFO] [stderr] 104 |             |d: &str| -> String {"reassign once".to_string()}
[INFO] [stderr]     |              ^ help: consider prefixing with an underscore: `_d`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]    --> src/lib.rs:127:14
[INFO] [stderr]     |
[INFO] [stderr] 127 |             |d: &str| -> String {"reassign once".to_string()}
[INFO] [stderr]     |              ^ help: consider prefixing with an underscore: `_d`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:147:13
[INFO] [stderr]     |
[INFO] [stderr] 147 |             res.join();
[INFO] [stderr]     |             ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:165:13
[INFO] [stderr]     |
[INFO] [stderr] 165 |             res.join();
[INFO] [stderr]     |             ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.84s
[INFO] running `"docker" "inspect" "a6bdd1e07b197b49e5ddc04d562638fd363e579cc55b86048442e4de959da399"`
[INFO] running `"docker" "rm" "-f" "a6bdd1e07b197b49e5ddc04d562638fd363e579cc55b86048442e4de959da399"`
[INFO] [stdout] a6bdd1e07b197b49e5ddc04d562638fd363e579cc55b86048442e4de959da399
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/funfun/0.2.4:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 9a1d3ab950d2bd1a14af0a741c9c5bf1fb0f1b640bed22e0698aab9a2946fa1a
[INFO] running `"docker" "start" "-a" "9a1d3ab950d2bd1a14af0a741c9c5bf1fb0f1b640bed22e0698aab9a2946fa1a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/funfun-307445c9c8337989
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test tests::in_struct_arc_fn ... ok
[INFO] [stdout] test tests::in_struct_box_fn ... ok
[INFO] [stdout] test tests::one_arity_box_fn ... ok
[INFO] [stdout] test tests::pass_function_box_fn ... ok
[INFO] [stdout] test tests::pass_named_box_fn ... ok
[INFO] [stdout] test tests::zero_arity_box_fn ... ok
[INFO] [stdout] test tests::multithreading_box_fn ... ok
[INFO] [stdout] accepts closures to run in their own thread!
[INFO] [stdout] test tests::multithreading_spawn_fn ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests funfun
[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" "9a1d3ab950d2bd1a14af0a741c9c5bf1fb0f1b640bed22e0698aab9a2946fa1a"`
[INFO] running `"docker" "rm" "-f" "9a1d3ab950d2bd1a14af0a741c9c5bf1fb0f1b640bed22e0698aab9a2946fa1a"`
[INFO] [stdout] 9a1d3ab950d2bd1a14af0a741c9c5bf1fb0f1b640bed22e0698aab9a2946fa1a