[INFO] cloning repository https://github.com/FuGangqiang/RustPractices
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/FuGangqiang/RustPractices" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFuGangqiang%2FRustPractices", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFuGangqiang%2FRustPractices'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1070eb7e8aae9e6b1169a56192248a14086a5bdb
[INFO] testing FuGangqiang/RustPractices against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFuGangqiang%2FRustPractices" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/FuGangqiang/RustPractices on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/FuGangqiang/RustPractices
[INFO] finished tweaking git repo https://github.com/FuGangqiang/RustPractices
[INFO] tweaked toml for git repo https://github.com/FuGangqiang/RustPractices written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/FuGangqiang/RustPractices already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0df3e4ff2bd4af6dd67c7ec5ee8f0c1365967c312fe3dad73ce9d29f73c6e4f2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0df3e4ff2bd4af6dd67c7ec5ee8f0c1365967c312fe3dad73ce9d29f73c6e4f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0df3e4ff2bd4af6dd67c7ec5ee8f0c1365967c312fe3dad73ce9d29f73c6e4f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0df3e4ff2bd4af6dd67c7ec5ee8f0c1365967c312fe3dad73ce9d29f73c6e4f2", kill_on_drop: false }`
[INFO] [stdout] 0df3e4ff2bd4af6dd67c7ec5ee8f0c1365967c312fe3dad73ce9d29f73c6e4f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 99ebc05637d503ad8d4e097d4ac023e5ba799fabfe6b4d1a4bd097698c5e8059
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "99ebc05637d503ad8d4e097d4ac023e5ba799fabfe6b4d1a4bd097698c5e8059", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling practices v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.56s
[INFO] running `Command { std: "docker" "inspect" "99ebc05637d503ad8d4e097d4ac023e5ba799fabfe6b4d1a4bd097698c5e8059", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99ebc05637d503ad8d4e097d4ac023e5ba799fabfe6b4d1a4bd097698c5e8059", kill_on_drop: false }`
[INFO] [stdout] 99ebc05637d503ad8d4e097d4ac023e5ba799fabfe6b4d1a4bd097698c5e8059
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cd5f73ba0cacfad07da315a345f1bf7898f82a9079cbc68f2ce075abee80fa2f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "cd5f73ba0cacfad07da315a345f1bf7898f82a9079cbc68f2ce075abee80fa2f", kill_on_drop: false }`
[INFO] [stderr]    Compiling practices v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.13s
[INFO] running `Command { std: "docker" "inspect" "cd5f73ba0cacfad07da315a345f1bf7898f82a9079cbc68f2ce075abee80fa2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd5f73ba0cacfad07da315a345f1bf7898f82a9079cbc68f2ce075abee80fa2f", kill_on_drop: false }`
[INFO] [stdout] cd5f73ba0cacfad07da315a345f1bf7898f82a9079cbc68f2ce075abee80fa2f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 31a44c34c13df82be877d154ea6aca822e8d0a7ab9581a29ec5cd42ff623973d
[INFO] running `Command { std: "docker" "start" "-a" "31a44c34c13df82be877d154ea6aca822e8d0a7ab9581a29ec5cd42ff623973d", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] running 50 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/practices-9fec6dc1bd6b9aaa)
[INFO] [stdout] test clrs::max_subarray::tests::test_find_max_subarray_recursive ... ok
[INFO] [stdout] test clrs::two_sum::tests::test_two_sum ... ok
[INFO] [stdout] test sorting::bubble_sort::tests::test_empty ... ok
[INFO] [stdout] test sorting::bucket_sort::tests::test_empty ... ok
[INFO] [stdout] test sorting::bucket_sort::tests::test_one_element ... ok
[INFO] [stdout] test sorting::bubble_sort::tests::test_sort ... ok
[INFO] [stdout] test sorting::bucket_sort::tests::test_sort ... ok
[INFO] [stdout] test sorting::counting_sort::tests::test_empty ... ok
[INFO] [stdout] test sorting::counting_sort::tests::test_one_element ... ok
[INFO] [stdout] test sorting::insert_sort::tests::test_empty ... ok
[INFO] [stdout] test sorting::merge_sort::tests::test_empty ... ok
[INFO] [stdout] test clrs::max_subarray::tests::test_find_max_subarray_iterative ... ok
[INFO] [stdout] test sorting::merge_sort::tests::test_odd_sort ... ok
[INFO] [stdout] test sorting::selection_sort::tests::test_empty ... ok
[INFO] [stdout] test sorting::radix_sort::tests::test_empty ... ok
[INFO] [stdout] test sorting::selection_sort::tests::test_sort ... ok
[INFO] [stdout] test sorting::insert_sort::tests::test_one_element ... ok
[INFO] [stdout] test sorting::insert_sort::tests::test_sort ... ok
[INFO] [stdout] test sorting::shell_sort::tests::test_empty ... ok
[INFO] [stdout] test sorting::merge_sort::tests::test_even_sort ... ok
[INFO] [stdout] test structure::deque::test::into_iter ... ok
[INFO] [stdout] test sorting::shell_sort::tests::test_sort ... ok
[INFO] [stdout] test sorting::shell_sort::tests::test_one_element ... ok
[INFO] [stdout] test structure::deque::test::peek ... ok
[INFO] [stdout] test structure::list::test::basics ... ok
[INFO] [stdout] test structure::list::test::iter ... ok
[INFO] [stdout] test structure::max_heap::tests::test_new ... ok
[INFO] [stdout] test structure::max_heap::tests::test_push_pop ... ok
[INFO] [stdout] test structure::min_heap::tests::test_new ... ok
[INFO] [stdout] test structure::min_heap::tests::test_push_pop ... ok
[INFO] [stdout] test structure::unsafe_deque::test::basics ... ok
[INFO] [stdout] test structure::unsafe_deque::test::into_iter ... ok
[INFO] [stdout] test structure::unsafe_deque::test::peek ... ok
[INFO] [stdout] test structure::unsafe_red_black_tree::tests::test_get ... ok
[INFO] [stdout] test structure::unsafe_red_black_tree::tests::test_inorder_tree_walk_1 ... ok
[INFO] [stdout] test structure::unsafe_red_black_tree::tests::test_inorder_tree_walk_2 ... ok
[INFO] [stdout] test structure::unsafe_stack::test::basics ... ok
[INFO] [stderr]    Doc-tests practices
[INFO] [stdout] test sorting::quick_sort::tests::test_empty ... ok
[INFO] [stdout] test sorting::bubble_sort::tests::test_one_element ... ok
[INFO] [stdout] test sorting::counting_sort::tests::test_sort ... ok
[INFO] [stdout] test sorting::heap_sort::tests::test_sort ... ok
[INFO] [stdout] test sorting::merge_sort::tests::test_one_element ... ok
[INFO] [stdout] test sorting::quick_sort::tests::test_sort ... ok
[INFO] [stdout] test sorting::quick_sort::tests::test_one_element ... ok
[INFO] [stdout] test sorting::radix_sort::tests::test_one_element ... ok
[INFO] [stdout] test sorting::heap_sort::tests::test_empty ... ok
[INFO] [stdout] test sorting::selection_sort::tests::test_one_element ... ok
[INFO] [stdout] test sorting::heap_sort::tests::test_one_element ... ok
[INFO] [stdout] test structure::deque::test::basics ... ok
[INFO] [stdout] test sorting::radix_sort::tests::test_sort ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 50 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "31a44c34c13df82be877d154ea6aca822e8d0a7ab9581a29ec5cd42ff623973d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31a44c34c13df82be877d154ea6aca822e8d0a7ab9581a29ec5cd42ff623973d", kill_on_drop: false }`
[INFO] [stdout] 31a44c34c13df82be877d154ea6aca822e8d0a7ab9581a29ec5cd42ff623973d