[INFO] crate suppositions 0.1.4 is already in cache
[INFO] extracting crate suppositions 0.1.4 into work/ex/beta-1.37-6/sources/1.36.0/reg/suppositions/0.1.4
[INFO] extracting crate suppositions 0.1.4 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/suppositions/0.1.4
[INFO] validating manifest of suppositions-0.1.4 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 suppositions-0.1.4 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 suppositions-0.1.4
[INFO] finished frobbing suppositions-0.1.4
[INFO] frobbed toml for suppositions-0.1.4 written to work/ex/beta-1.37-6/sources/1.36.0/reg/suppositions/0.1.4/Cargo.toml
[INFO] started frobbing suppositions-0.1.4
[INFO] finished frobbing suppositions-0.1.4
[INFO] frobbed toml for suppositions-0.1.4 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/suppositions/0.1.4/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 suppositions-0.1.4 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-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/suppositions/0.1.4:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 72fc8b50baaff819adcf3eea0e6b3ae2fa9524fb7c12f270dd31a9640a4612b8
[INFO] running `"docker" "start" "-a" "72fc8b50baaff819adcf3eea0e6b3ae2fa9524fb7c12f270dd31a9640a4612b8"`
[INFO] [stderr]    Compiling suppositions v0.1.4 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.41s
[INFO] running `"docker" "inspect" "72fc8b50baaff819adcf3eea0e6b3ae2fa9524fb7c12f270dd31a9640a4612b8"`
[INFO] running `"docker" "rm" "-f" "72fc8b50baaff819adcf3eea0e6b3ae2fa9524fb7c12f270dd31a9640a4612b8"`
[INFO] [stdout] 72fc8b50baaff819adcf3eea0e6b3ae2fa9524fb7c12f270dd31a9640a4612b8
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/suppositions/0.1.4:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 022acbd5326c8f623009c7a5cce2e407f123b250a0b7340a0a368ebc679745a5
[INFO] running `"docker" "start" "-a" "022acbd5326c8f623009c7a5cce2e407f123b250a0b7340a0a368ebc679745a5"`
[INFO] [stderr]    Compiling suppositions v0.1.4 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> tests/smoketest.rs:57:14
[INFO] [stderr]    |
[INFO] [stderr] 57 |     property((booleans())).check(|_| false)
[INFO] [stderr]    |              ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> tests/smoketest.rs:62:14
[INFO] [stderr]    |
[INFO] [stderr] 62 |     property((booleans())).check(|_| true)
[INFO] [stderr]    |              ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> tests/smoketest.rs:77:14
[INFO] [stderr]    |
[INFO] [stderr] 77 |     property((booleans())).check(|_| -> Result<(), ()> { Err(()) })
[INFO] [stderr]    |              ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> tests/smoketest.rs:83:14
[INFO] [stderr]    |
[INFO] [stderr] 83 |     property((booleans())).check(|_| -> Result<(), &'static str> { Err("horrible failure") })
[INFO] [stderr]    |              ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> tests/smoketest.rs:89:14
[INFO] [stderr]    |
[INFO] [stderr] 89 |     property((booleans())).check(|_| -> Result<(), ()> { Ok(()) })
[INFO] [stderr]    |              ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> tests/smoketest.rs:95:14
[INFO] [stderr]    |
[INFO] [stderr] 95 |     property((booleans())).check(|_| -> () { panic!("Big bad boom") })
[INFO] [stderr]    |              ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> tests/smoketest.rs:101:14
[INFO] [stderr]     |
[INFO] [stderr] 101 |     property((booleans())).check(|_| -> () { panic!("Big bad boom") })
[INFO] [stderr]     |              ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.59s
[INFO] running `"docker" "inspect" "022acbd5326c8f623009c7a5cce2e407f123b250a0b7340a0a368ebc679745a5"`
[INFO] running `"docker" "rm" "-f" "022acbd5326c8f623009c7a5cce2e407f123b250a0b7340a0a368ebc679745a5"`
[INFO] [stdout] 022acbd5326c8f623009c7a5cce2e407f123b250a0b7340a0a368ebc679745a5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/suppositions/0.1.4:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] d32a81dff57c44b50b9116c21c618c05a292e3475c24d386038ef86c08fcbc5a
[INFO] running `"docker" "start" "-a" "d32a81dff57c44b50b9116c21c618c05a292e3475c24d386038ef86c08fcbc5a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/suppositions-172a066c62e44c95
[INFO] [stdout] 
[INFO] [stdout] running 61 tests
[INFO] [stdout] test data::tests::minimiser_should_minimise_scalar_values_accounting_for_overflow ... ok
[INFO] [stdout] test data::tests::minimiser_should_minimise_scalar_values_to_empty ... ok
[INFO] [stdout] test data::tests::minimiser_should_minimise_to_empty ... ok
[INFO] [stdout] test data::tests::minimiser_should_minimise_to_minimum_given_size ... ok
[INFO] [stdout] test data::tests::replay_can_act_as_iterator ... ok
[INFO] [stdout] test data::tests::should_generate_random_data ... ok
[INFO] [stdout] test data::tests::should_allow_restarting_read ... ok
[INFO] [stdout] test data::tests::should_allow_borrowing_buffer ... ok
[INFO] [stdout] test data::tests::minimiser_should_minimise_scalar_values_by_search ... ok
[INFO] [stdout] test data::tests::minimiser_should_minimise_scalar_values ... ok
[INFO] [stdout] test data::tests::should_take_each_item_in_pool ... ok
[INFO] [stdout] test data::tests::tap_can_act_as_iterator ... ok
[INFO] [stdout] test generators::tests::biased_coin ... ok
[INFO] [stdout] test generators::tests::bools_minimize_to_false ... ok
[INFO] [stdout] test generators::tests::bools_should_generate_true_booleans_from_saturated_values ... ok
[INFO] [stdout] test generators::tests::bools_should_generate_false_booleans_from_zeros ... ok
[INFO] [stdout] test generators::tests::bools_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test generators::tests::collections_u64s_minimize_to_empty ... ok
[INFO] [stdout] test generators::tests::consts_should_generate_same_values ... ok
[INFO] [stdout] test generators::tests::filter_map_should_pass_through_when_ok ... ok
[INFO] [stdout] test generators::tests::filter_map_should_skip_when_err ... ok
[INFO] [stdout] test generators::tests::filter_should_pass_through_when_true ... ok
[INFO] [stdout] test generators::tests::filter_should_skip_when_false ... ok
[INFO] [stdout] test generators::tests::i64s_minimize_to_zero ... ok
[INFO] [stdout] test generators::tests::i64s_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test generators::tests::collection_lengths::mean_length_can_be_set_as_7 ... ok
[INFO] [stdout] test generators::tests::bools_usually_generates_different_output_for_different_inputs ... ok
[INFO] [stdout] test generators::tests::info_pools_minimize_to_empty ... ok
[INFO] [stdout] test generators::tests::bools_should_partially_order_same_as_source ... ok
[INFO] [stdout] test generators::tests::collection_lengths::mean_length_can_be_set_as_3 ... ok
[INFO] [stdout] test generators::tests::collection_lengths::mean_length_can_be_set_as_5 ... ok
[INFO] [stdout] test generators::tests::optional_u64s_minimize_to_none ... ok
[INFO] [stdout] test generators::tests::collection_lengths::mean_length_can_be_set_as_10 ... ok
[INFO] [stdout] test generators::tests::collection_lengths::mean_length_can_be_set_as_23 ... ok
[INFO] [stdout] test generators::tests::tuple_u8s_u8s_minimize_to_zero ... ok
[INFO] [stdout] test generators::tests::info_pools_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test generators::tests::result_u8_u64s_minimize_to_ok ... ok
[INFO] [stdout] test generators::tests::info_pools_usually_generates_different_output_for_different_inputs ... ok
[INFO] [stdout] test generators::tests::u64s_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test generators::tests::tuple_u8s_u8s_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test generators::tests::u64s_minimize_to_zero ... ok
[INFO] [stdout] test generators::tests::u8s_minimize_to_zero ... ok
[INFO] [stdout] test generators::tests::one_of_should_pick_choices_relativey_evenly ... ok
[INFO] [stdout] test generators::tests::i64s_usually_generates_different_output_for_different_inputs ... ok
[INFO] [stdout] test generators::tests::u8s_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test generators::tests::vec_bools_can_minimise_with_predicate ... ok
[INFO] [stdout] test generators::tests::vec_bools_minimize_to_empty ... ok
[INFO] [stdout] test generators::tests::u64s_should_partially_order_same_as_source ... ok
[INFO] [stdout] test generators::tests::i64s_should_partially_order_same_as_source ... ok
[INFO] [stdout] test generators::tests::vecs_usually_generates_different_output_for_different_inputs ... ok
[INFO] [stdout] test generators::tests::u8s_usually_generates_different_output_for_different_inputs ... ok
[INFO] [stdout] test generators::tests::u64s_usually_generates_different_output_for_different_inputs ... ok
[INFO] [stdout] test generators::tests::tuple_u8s_u8s_usually_generates_different_output_for_different_inputs ... ok
[INFO] [stdout] test generators::tests::vecs_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test generators::tests::vector_lengths::mean_length_can_be_set_as_23 ... ok
[INFO] [stdout] test generators::tests::vector_lengths::mean_length_can_be_set_as_3 ... ok
[INFO] [stdout] test generators::tests::vector_lengths::mean_length_can_be_set_as_10 ... ok
[INFO] [stdout] test generators::tests::vector_lengths::mean_length_can_be_set_as_7 ... ok
[INFO] [stdout] test generators::tests::vector_lengths::mean_length_can_be_set_as_5 ... ok
[INFO] [stdout] test generators::tests::tuple_u8s_u8s_should_partially_order_same_as_source ... ok
[INFO] [stdout] test generators::tests::u8s_should_partially_order_same_as_source ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 61 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/generators-ab6794f47b2da836
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test boxed_generator_yields_same_as_inner_value ... ok
[INFO] [stdout] test generator_map_should_trivially_preserve_invariants ... ok
[INFO] [stdout] test f64s_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test lazy_generator_yields_same_as_inner_value ... ok
[INFO] [stdout] test uniform_f64s_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test generator_of_2_tuple ... ok
[INFO] [stdout] test generator_of_3_tuple ... ok
[INFO] [stdout] test one_of_should_pick_a_single_sample ... ok
[INFO] [stdout] test i64s_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test uniform_f64s_should_generate_values_between_0_and_1 ... ok
[INFO] [stdout] test f64s_should_partially_order_same_as_source ... ok
[INFO] [stdout] test weighted_coin_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test one_of_should_partially_order_same_as_source ... ok
[INFO] [stdout] test i64s_should_partially_order_same_as_source ... ok
[INFO] [stdout] test weighted_coin_should_partially_order_same_as_source ... ok
[INFO] [stdout] test uniform_f64s_should_partially_order_same_as_source ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/recursive-2a6c99051521b02f
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test add_adds ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/smoketest-f6cb4275c4623405
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test some_approximation_of_usage ... ok
[INFO] [stdout] test trivial_pass ... ok
[INFO] [stdout] test trivial_result_pass ... ok
[INFO] [stdout] test trivial_result_failure ... ok
[INFO] [stdout] test trivial_panic_failure ... ok
[INFO] [stdout] test mersenne_conjecture ... ok
[INFO] [stdout] test some_approximation_of_failing_example ... ok
[INFO] [stdout] test trivial_result_includes_failing_result ... ok
[INFO] [stdout] test trivial_failure ... ok
[INFO] [stdout] test panic_includes_failure_message ... ok
[INFO] [stdout] test value_dependent ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests suppositions
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs -  (line 25) ... ok
[INFO] [stdout] test src/generators.rs - generators::one_of (line 618) ... ok
[INFO] [stdout] test src/generators.rs - generators::collections (line 246) ... 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" "d32a81dff57c44b50b9116c21c618c05a292e3475c24d386038ef86c08fcbc5a"`
[INFO] running `"docker" "rm" "-f" "d32a81dff57c44b50b9116c21c618c05a292e3475c24d386038ef86c08fcbc5a"`
[INFO] [stdout] d32a81dff57c44b50b9116c21c618c05a292e3475c24d386038ef86c08fcbc5a