[INFO] fetching crate flat-tree 5.0.0...
[INFO] testing flat-tree-5.0.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate flat-tree 5.0.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate flat-tree 5.0.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flat-tree 5.0.0
[INFO] finished tweaking crates.io crate flat-tree 5.0.0
[INFO] tweaked toml for crates.io crate flat-tree 5.0.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", 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] 4abcd81ad1a7aa3902a6e794ef64e7df6afa175369902d8605dca466b8047697
[INFO] running `Command { std: "docker" "start" "-a" "4abcd81ad1a7aa3902a6e794ef64e7df6afa175369902d8605dca466b8047697", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4abcd81ad1a7aa3902a6e794ef64e7df6afa175369902d8605dca466b8047697", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4abcd81ad1a7aa3902a6e794ef64e7df6afa175369902d8605dca466b8047697", kill_on_drop: false }`
[INFO] [stdout] 4abcd81ad1a7aa3902a6e794ef64e7df6afa175369902d8605dca466b8047697
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=warn" "-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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2376ec1dc52251cf5e5dc3eca8340081bc94ced7093de08e5245e36a2ea248d4
[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" "2376ec1dc52251cf5e5dc3eca8340081bc94ced7093de08e5245e36a2ea248d4", kill_on_drop: false }`
[INFO] [stderr]    Compiling flat-tree v5.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/iterator.rs:262:5
[INFO] [stdout]     |
[INFO] [stdout] 262 |     ((1 << 30) * (1 << (n - 30)))
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `Command { std: "docker" "inspect" "2376ec1dc52251cf5e5dc3eca8340081bc94ced7093de08e5245e36a2ea248d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2376ec1dc52251cf5e5dc3eca8340081bc94ced7093de08e5245e36a2ea248d4", kill_on_drop: false }`
[INFO] [stdout] 2376ec1dc52251cf5e5dc3eca8340081bc94ced7093de08e5245e36a2ea248d4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=warn" "-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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", 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] ef2d91973761324c7ca20e1ab3bfc3f8b0e5522353f7312bf5410ee283fdc025
[INFO] running `Command { std: "docker" "start" "-a" "ef2d91973761324c7ca20e1ab3bfc3f8b0e5522353f7312bf5410ee283fdc025", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/iterator.rs:262:5
[INFO] [stdout]     |
[INFO] [stdout] 262 |     ((1 << 30) * (1 << (n - 30)))
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling bstr v0.2.14
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling csv v1.1.5
[INFO] [stderr]    Compiling criterion v0.3.3
[INFO] [stderr]    Compiling flat-tree v5.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/iterator.rs:262:5
[INFO] [stdout]     |
[INFO] [stdout] 262 |     ((1 << 30) * (1 << (n - 30)))
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 29.54s
[INFO] running `Command { std: "docker" "inspect" "ef2d91973761324c7ca20e1ab3bfc3f8b0e5522353f7312bf5410ee283fdc025", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef2d91973761324c7ca20e1ab3bfc3f8b0e5522353f7312bf5410ee283fdc025", kill_on_drop: false }`
[INFO] [stdout] ef2d91973761324c7ca20e1ab3bfc3f8b0e5522353f7312bf5410ee283fdc025
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=warn" "-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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] efcee2eb52d8231c58e8f9d28dd12334a8252d443d74e2dfbdc82d079fce8f26
[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" "efcee2eb52d8231c58e8f9d28dd12334a8252d443d74e2dfbdc82d079fce8f26", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/iterator.rs:262:5
[INFO] [stderr]     |
[INFO] [stderr] 262 |     ((1 << 30) * (1 << (n - 30)))
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/iterator.rs:262:5
[INFO] [stderr]     |
[INFO] [stderr] 262 |     ((1 << 30) * (1 << (n - 30)))
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/flat_tree-614c7651274adca1
[INFO] [stdout] running 6 tests
[INFO] [stdout] test iterator::tests::test_two_pow ... ok
[INFO] [stdout] test iterator::tests::test_two_pow_64bit ... ok
[INFO] [stdout] test tests::test_child_to_parent_to_child ... ok
[INFO] [stdout] test tests::test_is_even ... ok
[INFO] [stdout] test tests::test_is_odd ... ok
[INFO] [stdout] test tests::test_parent_gt_int32 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/iterator-08a314a4276a3cc9
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test iterator ... ok
[INFO] [stdout] test non_leaf_start ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/iterator_regression-2450514ece40af89
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]    Doc-tests flat-tree
[INFO] [stdout] test parent_and_odd_offset ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> /opt/rustwide/workdir/src/iterator.rs:262:5
[INFO] [stderr]     |
[INFO] [stderr] 262 |     ((1 << 30) * (1 << (n - 30)))
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 26 tests
[INFO] [stdout] test src/iterator.rs - iterator::Iterator::sibling (line 129) ... ok
[INFO] [stdout] test src/iterator.rs - iterator::Iterator::is_left (line 84) ... ok
[INFO] [stdout] test src/iterator.rs - iterator::Iterator::is_right (line 97) ... ok
[INFO] [stdout] test src/iterator.rs - iterator::Iterator::left_child (line 203) ... ok
[INFO] [stdout] test src/iterator.rs - iterator::Iterator::parent (line 146) ... ok
[INFO] [stdout] test src/iterator.rs - iterator::Iterator::left_span (line 167) ... ok
[INFO] [stdout] test src/iterator.rs - iterator::Iterator::right_child (line 222) ... ok
[INFO] [stdout] test src/lib.rs - children (line 113) ... ok
[INFO] [stdout] test src/iterator.rs - iterator (line 2) ... ok
[INFO] [stdout] test src/lib.rs - count (line 231) ... ok
[INFO] [stdout] test src/iterator.rs - iterator::Iterator::prev (line 110) ... ok
[INFO] [stdout] test src/iterator.rs - iterator::Iterator::seek (line 62) ... ok
[INFO] [stdout] test src/iterator.rs - iterator::Iterator::new (line 25) ... ok
[INFO] [stdout] test src/iterator.rs - iterator::Iterator::right_span (line 185) ... ok
[INFO] [stdout] test src/lib.rs - depth (line 31) ... ok
[INFO] [stdout] test src/lib.rs - left_span (line 196) ... ok
[INFO] [stdout] test src/lib.rs - left_child (line 135) ... ok
[INFO] [stdout] test src/lib.rs - parent (line 67) ... ok
[INFO] [stdout] test src/lib.rs - offset (line 47) ... ok
[INFO] [stdout] test src/lib.rs - right_child (line 155) ... ok
[INFO] [stdout] test src/lib.rs - index (line 12) ... ok
[INFO] [stdout] test src/lib.rs - full_roots (line 256) ... ok
[INFO] [stdout] test src/lib.rs - sibling (line 83) ... ok
[INFO] [stdout] test src/lib.rs - spans (line 216) ... ok
[INFO] [stdout] test src/lib.rs - uncle (line 98) ... ok
[INFO] [stdout] test src/lib.rs - right_span (line 176) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 26 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "efcee2eb52d8231c58e8f9d28dd12334a8252d443d74e2dfbdc82d079fce8f26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efcee2eb52d8231c58e8f9d28dd12334a8252d443d74e2dfbdc82d079fce8f26", kill_on_drop: false }`
[INFO] [stdout] efcee2eb52d8231c58e8f9d28dd12334a8252d443d74e2dfbdc82d079fce8f26