[INFO] updating cached repository huwb/learningrust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/huwb/learningrust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/huwb/learningrust" "work/ex/beta-1.37-6/sources/1.36.0/gh/huwb/learningrust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/huwb/learningrust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/huwb/learningrust" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/huwb/learningrust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/huwb/learningrust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 419b6eacb02bba0520897cba8888fb5184f3a1b8
[INFO] sha for GitHub repo huwb/learningrust: 419b6eacb02bba0520897cba8888fb5184f3a1b8
[INFO] validating manifest of huwb/learningrust 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 huwb/learningrust 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 huwb/learningrust
[INFO] finished frobbing huwb/learningrust
[INFO] frobbed toml for huwb/learningrust written to work/ex/beta-1.37-6/sources/1.36.0/gh/huwb/learningrust/Cargo.toml
[INFO] started frobbing huwb/learningrust
[INFO] finished frobbing huwb/learningrust
[INFO] frobbed toml for huwb/learningrust written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/huwb/learningrust/Cargo.toml
[INFO] crate huwb/learningrust already has a lockfile, it will not be regenerated
[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 huwb/learningrust 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-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/huwb/learningrust:/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] ddfcbd95fe1b30052feff278b8bdf879f9cc48add06001709c215bd94887e935
[INFO] running `"docker" "start" "-a" "ddfcbd95fe1b30052feff278b8bdf879f9cc48add06001709c215bd94887e935"`
[INFO] [stderr]    Compiling time v0.1.39
[INFO] [stderr]    Compiling simple-stopwatch v0.1.4
[INFO] [stderr]    Compiling learningrust v0.0.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.70s
[INFO] running `"docker" "inspect" "ddfcbd95fe1b30052feff278b8bdf879f9cc48add06001709c215bd94887e935"`
[INFO] running `"docker" "rm" "-f" "ddfcbd95fe1b30052feff278b8bdf879f9cc48add06001709c215bd94887e935"`
[INFO] [stdout] ddfcbd95fe1b30052feff278b8bdf879f9cc48add06001709c215bd94887e935
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/huwb/learningrust:/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] 3ac29beb528ed5c6dcb417a0025d81edd8fa7d3e512e1d5d3db58ecca033554c
[INFO] running `"docker" "start" "-a" "3ac29beb528ed5c6dcb417a0025d81edd8fa7d3e512e1d5d3db58ecca033554c"`
[INFO] [stderr]    Compiling learningrust v0.0.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.14s
[INFO] running `"docker" "inspect" "3ac29beb528ed5c6dcb417a0025d81edd8fa7d3e512e1d5d3db58ecca033554c"`
[INFO] running `"docker" "rm" "-f" "3ac29beb528ed5c6dcb417a0025d81edd8fa7d3e512e1d5d3db58ecca033554c"`
[INFO] [stdout] 3ac29beb528ed5c6dcb417a0025d81edd8fa7d3e512e1d5d3db58ecca033554c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/huwb/learningrust:/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] b5f191a4028556486b73960e0dfc43ef1551f6c918359e09874e6d1c7160656d
[INFO] running `"docker" "start" "-a" "b5f191a4028556486b73960e0dfc43ef1551f6c918359e09874e6d1c7160656d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/learningrust-42bd5f3785608ef5
[INFO] [stdout] 
[INFO] [stdout] running 57 tests
[INFO] [stdout] test adv_traits::tests::dist_multiple_first_shortest ... ok
[INFO] [stdout] test adv_traits::tests::dist_no_edges ... ok
[INFO] [stdout] test adv_traits::tests::dist_one_edge_bad_node ... ok
[INFO] [stdout] test adv_traits::tests::dist_two_edges ... ok
[INFO] [stdout] test adv_traits::tests::dist_one_edge_switched_nodes ... ok
[INFO] [stdout] test adv_traits::tests::dist_one_edge ... ok
[INFO] [stdout] test adv_traits::tests::dist_multiple_second_shortest ... ok
[INFO] [stdout] test iterators::tests::counter_calling_next ... ok
[INFO] [stdout] test iterators::tests::iterator_adaptor_filter ... ok
[INFO] [stdout] test closures::tests::cacher_starts_empty ... ok
[INFO] [stdout] test closures::tests::cacher_first_call_populates ... ok
[INFO] [stdout] test iterators::tests::counter_other_iterator_traits ... ok
[INFO] [stdout] test limit_tracker::tests::less_than_100pc ... ok
[INFO] [stdout] test limit_tracker::tests::less_than_70pc ... ok
[INFO] [stdout] test limit_tracker::tests::more_than_100pc ... ok
[INFO] [stdout] test longest_string::tests::longest_empty_strings ... ok
[INFO] [stdout] test generic_fn::tests::largest_in_list_returns_largest_value ... ok
[INFO] [stdout] test iterators::tests::iterator_adaptor_map ... ok
[INFO] [stdout] test closures::tests::cacher_second_call_uses_cache ... ok
[INFO] [stdout] test iterators::tests::iterator_sum ... ok
[INFO] [stdout] test new_type_pattern::tests::empty_vector ... ok
[INFO] [stdout] test new_type_pattern::tests::int_vector_1 ... ok
[INFO] [stdout] test new_type_pattern::tests::string_vector_3 ... ok
[INFO] [stdout] test points::tests::add_points ... ok
[INFO] [stdout] test prime::tests::factors_of_two_is_one_and_two ... ok
[INFO] [stdout] test prime::tests::factors_of_zero_are_none ... ok
[INFO] [stdout] test new_type_pattern::tests::int_vector_2 ... ok
[INFO] [stdout] test points::tests::copy_constructor ... ok
[INFO] [stdout] test prime::tests::factors_of_one_is_one ... ok
[INFO] [stdout] test prime::tests::prime_examples ... ok
[INFO] [stdout] test prime::tests::nonprime_examples ... ok
[INFO] [stdout] test prime::tests::factors_three_to_six ... ok
[INFO] [stdout] test prime::tests::one_not_prime ... ok
[INFO] [stdout] test smart_pointers::tests::mylist_add ... ok
[INFO] [stdout] test smart_pointers::tests::mylist_constructors ... ok
[INFO] [stdout] test rc_refcell::tests::runtime_mutable_borrow ... ok
[INFO] [stdout] test smart_pointers::tests::mylist_push ... ok
[INFO] [stdout] test ref_cycles::tests::check_weak_and_strong_counts ... ok
[INFO] [stdout] test smart_pointers::tests::ref_count ... ok
[INFO] [stdout] test spring::tests::default_values ... ok
[INFO] [stdout] test spring::tests::nonpositive_timestep_doesnt_change ... ok
[INFO] [stdout] test state_pattern::tests::approve_publishes_text ... ok
[INFO] [stdout] test prime::tests::zero_not_prime ... ok
[INFO] [stdout] test spring::tests::update_default_vals ... ok
[INFO] [stdout] test state_pattern::tests::multiple_add_texts_append ... ok
[INFO] [stdout] test state_pattern::tests::draft_text_not_published ... ok
[INFO] [stdout] test spring::tests::update_stiff ... ok
[INFO] [stdout] test state_pattern::tests::requested_review_text_not_published ... ok
[INFO] [stdout] test state_pattern::tests::new_post_empty ... ok
[INFO] [stdout] test state_pattern_rust::tests::post_workflow ... ok
[INFO] [stdout] test threadpool::tests::create_then_join ... ok
[INFO] [stdout] test threadpool::tests::run_trivial_job ... ok
[INFO] [stdout] test generic_fn::tests::largest_in_empty_list_panics ... ok
[INFO] [stdout] test limit_tracker::tests::decreasing_value_panics ... ok
[INFO] [stdout] test rc_refcell::tests::runtime_two_mutable_borrows_panics ... ok
[INFO] [stdout] test threadpool::tests::zero_thread_count_panics ... ok
[INFO] [stdout] test prime::tests::compute_primes_st_vs_mt ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 57 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/learningrust-07461464d36739e0
[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] [stderr]      Running /opt/crater/target/debug/deps/integration_test-001fa6d79dc2405c
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test longest_string_works ... ok
[INFO] [stdout] test check_thread_pool ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests learningrust
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/longest_string.rs - longest_string::longest (line 23) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "b5f191a4028556486b73960e0dfc43ef1551f6c918359e09874e6d1c7160656d"`
[INFO] running `"docker" "rm" "-f" "b5f191a4028556486b73960e0dfc43ef1551f6c918359e09874e6d1c7160656d"`
[INFO] [stdout] b5f191a4028556486b73960e0dfc43ef1551f6c918359e09874e6d1c7160656d