[INFO] crate rbtree 0.1.5 is already in cache
[INFO] testing rbtree-0.1.5 against beta-2020-07-24 for beta-1.46-1
[INFO] extracting crate rbtree 0.1.5 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate rbtree 0.1.5 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rbtree 0.1.5
[INFO] finished tweaking crates.io crate rbtree 0.1.5
[INFO] tweaked toml for crates.io crate rbtree 0.1.5 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 32b9db835cadb8e8db00ace13ade45def5f85e124dfd4b16509aec384c912320
[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" "32b9db835cadb8e8db00ace13ade45def5f85e124dfd4b16509aec384c912320", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "32b9db835cadb8e8db00ace13ade45def5f85e124dfd4b16509aec384c912320", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32b9db835cadb8e8db00ace13ade45def5f85e124dfd4b16509aec384c912320", kill_on_drop: false }`
[INFO] [stdout] 32b9db835cadb8e8db00ace13ade45def5f85e124dfd4b16509aec384c912320
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--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] 25483faae134457ef2efbe44e8683627bb71630c9b1d3ac9bb91b34cebaa322d
[INFO] running `Command { std: "docker" "start" "-a" "25483faae134457ef2efbe44e8683627bb71630c9b1d3ac9bb91b34cebaa322d", kill_on_drop: false }`
[INFO] [stderr]    Compiling rbtree v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:491:34
[INFO] [stdout]     |
[INFO] [stdout] 491 |     fn next(&mut self) -> Option<(&'a K)> {
[INFO] [stdout]     |                                  ^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:535:34
[INFO] [stdout]     |
[INFO] [stdout] 535 |     fn next(&mut self) -> Option<(&'a V)> {
[INFO] [stdout]     |                                  ^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:581:34
[INFO] [stdout]     |
[INFO] [stdout] 581 |     fn next(&mut self) -> Option<(&'a mut V)> {
[INFO] [stdout]     |                                  ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::RBTree`
[INFO] [stdout]     --> src/lib.rs:1404:9
[INFO] [stdout]      |
[INFO] [stdout] 1404 |     use super::RBTree;
[INFO] [stdout]      |         ^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "25483faae134457ef2efbe44e8683627bb71630c9b1d3ac9bb91b34cebaa322d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25483faae134457ef2efbe44e8683627bb71630c9b1d3ac9bb91b34cebaa322d", kill_on_drop: false }`
[INFO] [stdout] 25483faae134457ef2efbe44e8683627bb71630c9b1d3ac9bb91b34cebaa322d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c2e085e0f2f6ba8ea7eb58f754a56bfb983835c4189940b66d181984601e1ff3
[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" "c2e085e0f2f6ba8ea7eb58f754a56bfb983835c4189940b66d181984601e1ff3", kill_on_drop: false }`
[INFO] [stderr]    Compiling rbtree v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:491:34
[INFO] [stdout]     |
[INFO] [stdout] 491 |     fn next(&mut self) -> Option<(&'a K)> {
[INFO] [stdout]     |                                  ^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:535:34
[INFO] [stdout]     |
[INFO] [stdout] 535 |     fn next(&mut self) -> Option<(&'a V)> {
[INFO] [stdout]     |                                  ^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:581:34
[INFO] [stdout]     |
[INFO] [stdout] 581 |     fn next(&mut self) -> Option<(&'a mut V)> {
[INFO] [stdout]     |                                  ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::RBTree`
[INFO] [stdout]     --> src/lib.rs:1404:9
[INFO] [stdout]      |
[INFO] [stdout] 1404 |     use super::RBTree;
[INFO] [stdout]      |         ^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:491:34
[INFO] [stdout]     |
[INFO] [stdout] 491 |     fn next(&mut self) -> Option<(&'a K)> {
[INFO] [stdout]     |                                  ^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:535:34
[INFO] [stdout]     |
[INFO] [stdout] 535 |     fn next(&mut self) -> Option<(&'a V)> {
[INFO] [stdout]     |                                  ^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:581:34
[INFO] [stdout]     |
[INFO] [stdout] 581 |     fn next(&mut self) -> Option<(&'a mut V)> {
[INFO] [stdout]     |                                  ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.59s
[INFO] running `Command { std: "docker" "inspect" "c2e085e0f2f6ba8ea7eb58f754a56bfb983835c4189940b66d181984601e1ff3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2e085e0f2f6ba8ea7eb58f754a56bfb983835c4189940b66d181984601e1ff3", kill_on_drop: false }`
[INFO] [stdout] c2e085e0f2f6ba8ea7eb58f754a56bfb983835c4189940b66d181984601e1ff3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 144941b7ec8a7a58e6cdee47f317f9a1463ba2b169c63338a506479bf47897d7
[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" "144941b7ec8a7a58e6cdee47f317f9a1463ba2b169c63338a506479bf47897d7", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:491:34
[INFO] [stderr]     |
[INFO] [stderr] 491 |     fn next(&mut self) -> Option<(&'a K)> {
[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 type
[INFO] [stderr]    --> src/lib.rs:535:34
[INFO] [stderr]     |
[INFO] [stderr] 535 |     fn next(&mut self) -> Option<(&'a V)> {
[INFO] [stderr]     |                                  ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:581:34
[INFO] [stderr]     |
[INFO] [stderr] 581 |     fn next(&mut self) -> Option<(&'a mut V)> {
[INFO] [stderr]     |                                  ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::RBTree`
[INFO] [stderr]     --> src/lib.rs:1404:9
[INFO] [stderr]      |
[INFO] [stderr] 1404 |     use super::RBTree;
[INFO] [stderr]      |         ^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:491:34
[INFO] [stderr]     |
[INFO] [stderr] 491 |     fn next(&mut self) -> Option<(&'a K)> {
[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 type
[INFO] [stderr]    --> src/lib.rs:535:34
[INFO] [stderr]     |
[INFO] [stderr] 535 |     fn next(&mut self) -> Option<(&'a V)> {
[INFO] [stderr]     |                                  ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:581:34
[INFO] [stderr]     |
[INFO] [stderr] 581 |     fn next(&mut self) -> Option<(&'a mut V)> {
[INFO] [stderr]     |                                  ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rbtree-b12948e9660a74bb
[INFO] [stdout] 
[INFO] [stdout] running 25 tests
[INFO] [stdout] test tests::test_iter_mut_len ... ok
[INFO] [stdout] test tests::test_iterate ... ok
[INFO] [stdout] test tests::test_keys ... ok
[INFO] [stdout] test tests::test_find_mut ... ok
[INFO] [stdout] test tests::test_mut_size_hint ... ok
[INFO] [stdout] test tests::test_iter_len ... ok
[INFO] [stdout] test tests::test_empty_iter ... ok
[INFO] [stdout] test tests::test_remove ... ok
[INFO] [stdout] test tests::test_replace ... ok
[INFO] [stdout] test tests::test_show ... ok
[INFO] [stdout] test tests::test_size_hint ... ok
[INFO] [stdout] test tests::test_values ... ok
[INFO] [stdout] test tests::test_is_empty ... ok
[INFO] [stdout] test tests::test_from_iter ... ok
[INFO] [stdout] test tests::test_values_mut ... ok
[INFO] [stdout] test tests::test_extend_iter ... ok
[INFO] [stdout] test tests::test_pop ... ok
[INFO] [stdout] test tests::test_find ... ok
[INFO] [stdout] test tests::test_index ... ok
[INFO] [stdout] test tests::test_empty_remove ... ok
[INFO] [stdout] test tests::test_insert ... ok
[INFO] [stdout] test tests::test_eq ... ok
[INFO] [stdout] test tests::test_clone ... ok
[INFO] [stdout] test tests::test_lots_of_insertions ... ok
[INFO] [stdout] test tests::test_index_nonexistent ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 25 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rbtree
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> /opt/rustwide/workdir/src/lib.rs:491:34
[INFO] [stderr]     |
[INFO] [stderr] 491 |     fn next(&mut self) -> Option<(&'a K)> {
[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 type
[INFO] [stderr]    --> /opt/rustwide/workdir/src/lib.rs:535:34
[INFO] [stderr]     |
[INFO] [stderr] 535 |     fn next(&mut self) -> Option<(&'a V)> {
[INFO] [stderr]     |                                  ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> /opt/rustwide/workdir/src/lib.rs:581:34
[INFO] [stderr]     |
[INFO] [stderr] 581 |     fn next(&mut self) -> Option<(&'a mut V)> {
[INFO] [stderr]     |                                  ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test src/lib.rs - RBTree (line 282) ... ok
[INFO] [stdout] test src/lib.rs - Iter (line 653) ... ok
[INFO] [stdout] test src/lib.rs - Values (line 503) ... ok
[INFO] [stdout] test src/lib.rs - IterMut (line 729) ... ok
[INFO] [stdout] test src/lib.rs - ValuesMut (line 547) ... ok
[INFO] [stdout] test src/lib.rs - RBTree<K, V>::replace_or_insert (line 921) ... ok
[INFO] [stdout] test src/lib.rs - RBTree (line 324) ... ok
[INFO] [stdout] test src/lib.rs - Keys (line 461) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "144941b7ec8a7a58e6cdee47f317f9a1463ba2b169c63338a506479bf47897d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "144941b7ec8a7a58e6cdee47f317f9a1463ba2b169c63338a506479bf47897d7", kill_on_drop: false }`
[INFO] [stdout] 144941b7ec8a7a58e6cdee47f317f9a1463ba2b169c63338a506479bf47897d7