[INFO] crate quickercheck 0.2.0 is already in cache
[INFO] extracting crate quickercheck 0.2.0 into work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/reg/quickercheck/0.2.0
[INFO] extracting crate quickercheck 0.2.0 into work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/quickercheck/0.2.0
[INFO] validating manifest of quickercheck-0.2.0 on toolchain master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of quickercheck-0.2.0 on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing quickercheck-0.2.0
[INFO] finished frobbing quickercheck-0.2.0
[INFO] frobbed toml for quickercheck-0.2.0 written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/reg/quickercheck/0.2.0/Cargo.toml
[INFO] started frobbing quickercheck-0.2.0
[INFO] finished frobbing quickercheck-0.2.0
[INFO] frobbed toml for quickercheck-0.2.0 written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/quickercheck/0.2.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing quickercheck-0.2.0 against try#7fea0229842e79db1159ea58ad9a653b288efee9 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-4/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/quickercheck/0.2.0:/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=forbid" "-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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "build" "--frozen"`
[INFO] [stdout] db8c866d39737331250bf56bedb10052782700964dd8a20064dba26e7ef2d800
[INFO] running `"docker" "start" "-a" "db8c866d39737331250bf56bedb10052782700964dd8a20064dba26e7ef2d800"`
[INFO] [stderr]    Compiling quickercheck v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/arbitrary.rs:108:48
[INFO] [stderr]     |
[INFO] [stderr] 108 |                       FromIteratorGenerator::new(($($placeholder::arbitrary()),*))
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] ...
[INFO] [stderr] 119 | / generic_impls! {
[INFO] [stderr] 120 | |     Vec<T>,
[INFO] [stderr] 121 | |     BTreeMap<K, V>,
[INFO] [stderr] 122 | |     BTreeSet<T>,
[INFO] [stderr] ...   |
[INFO] [stderr] 127 | |     VecDeque<T>
[INFO] [stderr] 128 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/arbitrary.rs:112:47
[INFO] [stderr]     |
[INFO] [stderr] 112 |                       FromIteratorShrinker::new(($($placeholder::shrink()),*))
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] ...
[INFO] [stderr] 119 | / generic_impls! {
[INFO] [stderr] 120 | |     Vec<T>,
[INFO] [stderr] 121 | |     BTreeMap<K, V>,
[INFO] [stderr] 122 | |     BTreeSet<T>,
[INFO] [stderr] ...   |
[INFO] [stderr] 127 | |     VecDeque<T>
[INFO] [stderr] 128 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/arbitrary.rs:108:48
[INFO] [stderr]     |
[INFO] [stderr] 108 |                       FromIteratorGenerator::new(($($placeholder::arbitrary()),*))
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] ...
[INFO] [stderr] 119 | / generic_impls! {
[INFO] [stderr] 120 | |     Vec<T>,
[INFO] [stderr] 121 | |     BTreeMap<K, V>,
[INFO] [stderr] 122 | |     BTreeSet<T>,
[INFO] [stderr] ...   |
[INFO] [stderr] 127 | |     VecDeque<T>
[INFO] [stderr] 128 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.94s
[INFO] running `"docker" "inspect" "db8c866d39737331250bf56bedb10052782700964dd8a20064dba26e7ef2d800"`
[INFO] running `"docker" "rm" "-f" "db8c866d39737331250bf56bedb10052782700964dd8a20064dba26e7ef2d800"`
[INFO] [stdout] db8c866d39737331250bf56bedb10052782700964dd8a20064dba26e7ef2d800
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-4/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/quickercheck/0.2.0:/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=forbid" "-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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] 13d5a207e16ec84a93de5d35ad4d2edc49dad83b99d5868279d24b4966d933d8
[INFO] running `"docker" "start" "-a" "13d5a207e16ec84a93de5d35ad4d2edc49dad83b99d5868279d24b4966d933d8"`
[INFO] [stderr]    Compiling quickercheck v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/arbitrary.rs:108:48
[INFO] [stderr]     |
[INFO] [stderr] 108 |                       FromIteratorGenerator::new(($($placeholder::arbitrary()),*))
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] ...
[INFO] [stderr] 119 | / generic_impls! {
[INFO] [stderr] 120 | |     Vec<T>,
[INFO] [stderr] 121 | |     BTreeMap<K, V>,
[INFO] [stderr] 122 | |     BTreeSet<T>,
[INFO] [stderr] ...   |
[INFO] [stderr] 127 | |     VecDeque<T>
[INFO] [stderr] 128 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/arbitrary.rs:112:47
[INFO] [stderr]     |
[INFO] [stderr] 112 |                       FromIteratorShrinker::new(($($placeholder::shrink()),*))
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] ...
[INFO] [stderr] 119 | / generic_impls! {
[INFO] [stderr] 120 | |     Vec<T>,
[INFO] [stderr] 121 | |     BTreeMap<K, V>,
[INFO] [stderr] 122 | |     BTreeSet<T>,
[INFO] [stderr] ...   |
[INFO] [stderr] 127 | |     VecDeque<T>
[INFO] [stderr] 128 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/arbitrary.rs:108:48
[INFO] [stderr]     |
[INFO] [stderr] 108 |                       FromIteratorGenerator::new(($($placeholder::arbitrary()),*))
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] ...
[INFO] [stderr] 119 | / generic_impls! {
[INFO] [stderr] 120 | |     Vec<T>,
[INFO] [stderr] 121 | |     BTreeMap<K, V>,
[INFO] [stderr] 122 | |     BTreeSet<T>,
[INFO] [stderr] ...   |
[INFO] [stderr] 127 | |     VecDeque<T>
[INFO] [stderr] 128 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.71s
[INFO] running `"docker" "inspect" "13d5a207e16ec84a93de5d35ad4d2edc49dad83b99d5868279d24b4966d933d8"`
[INFO] running `"docker" "rm" "-f" "13d5a207e16ec84a93de5d35ad4d2edc49dad83b99d5868279d24b4966d933d8"`
[INFO] [stdout] 13d5a207e16ec84a93de5d35ad4d2edc49dad83b99d5868279d24b4966d933d8
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-4/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/quickercheck/0.2.0:/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=forbid" "-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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen"`
[INFO] [stdout] ca953e5d9ab9e5ea7018108ca2c8927d9a5d0362cd987fe3ce6bd1602c078456
[INFO] running `"docker" "start" "-a" "ca953e5d9ab9e5ea7018108ca2c8927d9a5d0362cd987fe3ce6bd1602c078456"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/quickercheck-75b74c94e1055816
[INFO] [stdout] 
[INFO] [stdout] running 30 tests
[INFO] [stdout] test property::tests::test_for_all_property ... ok
[INFO] [stdout] test property::tests::test_generic_property ... ok
[INFO] [stdout] test property::tests::test_when_property ... ok
[INFO] [stdout] test generate::tests::gen_unit ... ok
[INFO] [stdout] test generate::tests::gen_i8 ... ok
[INFO] [stdout] test property::tests::test_simple_property ... ok
[INFO] [stdout] test testable::tests::for_all_is_testable ... ok
[INFO] [stdout] test testable::tests::property_is_testable_by_reference ... ok
[INFO] [stdout] test generate::tests::gen_u8 ... ok
[INFO] [stdout] test testable::tests::cast_fn_is_testable2 ... ok
[INFO] [stdout] test testable::tests::property_returning_non_test_result_is_testable ... ok
[INFO] [stdout] test testable::tests::cast_fn_is_testable ... ok
[INFO] [stdout] test testable::tests::property_is_testable ... ok
[INFO] [stdout] test testable::tests::for_all_with_two_arguments_is_testable ... ok
[INFO] [stdout] test tests::failing_reverse_combine ... ok
[INFO] [stdout] test testable::tests::property_with_args_is_testable ... ok
[INFO] [stdout] test testable::tests::when_property_is_testable ... ok
[INFO] [stdout] test tests::prop_reverse_reverse ... ok
[INFO] [stdout] test tests::sieve_not_all_primes ... ok
[INFO] [stdout] test tests::max ... ok
[INFO] [stdout] test tests::reverse_app ... ok
[INFO] [stdout] test tests::sieve_not_prime ... ok
[INFO] [stdout] test tests::testable_result_err2 ... ok
[INFO] [stdout] test tests::testable_result ... ok
[INFO] [stdout] test tests::sort ... ok
[INFO] [stdout] test tests::testable_unit ... ok
[INFO] [stdout] test tests::prop_oob ... ok
[INFO] [stdout] test tests::failing_property ... ok
[INFO] [stdout] test tests::testable_result_err ... ok
[INFO] [stdout] test tests::reverse_single ... ok
[INFO] [stderr]    Doc-tests quickercheck
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 30 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" "ca953e5d9ab9e5ea7018108ca2c8927d9a5d0362cd987fe3ce6bd1602c078456"`
[INFO] running `"docker" "rm" "-f" "ca953e5d9ab9e5ea7018108ca2c8927d9a5d0362cd987fe3ce6bd1602c078456"`
[INFO] [stdout] ca953e5d9ab9e5ea7018108ca2c8927d9a5d0362cd987fe3ce6bd1602c078456