[INFO] fetching crate ternary-tree 0.1.1...
[INFO] testing ternary-tree-0.1.1 against master#1871252fc8bb672d40787e67404e6eaae7059369 for pr-125151
[INFO] extracting crate ternary-tree 0.1.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate ternary-tree 0.1.1 on toolchain 1871252fc8bb672d40787e67404e6eaae7059369
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ternary-tree 0.1.1
[INFO] finished tweaking crates.io crate ternary-tree 0.1.1
[INFO] tweaked toml for crates.io crate ternary-tree 0.1.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bac79fa4e33980abb671b2a6e8ca74cc3b29ef2c87fe323799e1208131ea2bbb
[INFO] running `Command { std: "docker" "start" "-a" "bac79fa4e33980abb671b2a6e8ca74cc3b29ef2c87fe323799e1208131ea2bbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bac79fa4e33980abb671b2a6e8ca74cc3b29ef2c87fe323799e1208131ea2bbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bac79fa4e33980abb671b2a6e8ca74cc3b29ef2c87fe323799e1208131ea2bbb", kill_on_drop: false }`
[INFO] [stdout] bac79fa4e33980abb671b2a6e8ca74cc3b29ef2c87fe323799e1208131ea2bbb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "RUSTDOCFLAGS=--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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a6451feeb6ac4a62d3da2c029807337a39b199aab934de4ea5f6f4e2fb7206b0
[INFO] running `Command { std: "docker" "start" "-a" "a6451feeb6ac4a62d3da2c029807337a39b199aab934de4ea5f6f4e2fb7206b0", kill_on_drop: false }`
[INFO] [stderr]    Compiling ternary-tree v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "a6451feeb6ac4a62d3da2c029807337a39b199aab934de4ea5f6f4e2fb7206b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6451feeb6ac4a62d3da2c029807337a39b199aab934de4ea5f6f4e2fb7206b0", kill_on_drop: false }`
[INFO] [stdout] a6451feeb6ac4a62d3da2c029807337a39b199aab934de4ea5f6f4e2fb7206b0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "RUSTDOCFLAGS=--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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 08cc22d36fb9cc80e36cbec73367a0dc1f6844aa73bc49e9276ae5685d16f76e
[INFO] running `Command { std: "docker" "start" "-a" "08cc22d36fb9cc80e36cbec73367a0dc1f6844aa73bc49e9276ae5685d16f76e", kill_on_drop: false }`
[INFO] [stderr]    Compiling ternary-tree v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:376:34
[INFO] [stdout]     |
[INFO] [stdout] 376 |     map.visit_values(|s| v.push(s.clone()));
[INFO] [stdout]     |                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:394:50
[INFO] [stdout]     |
[INFO] [stdout] 394 |     map.visit_complete_values("ab", |s| {v.push(s.clone())});
[INFO] [stdout]     |                                                  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:398:48
[INFO] [stdout]     |
[INFO] [stdout] 398 |     map.visit_complete_values("", |s| {v.push(s.clone())});
[INFO] [stdout]     |                                                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:415:54
[INFO] [stdout]     |
[INFO] [stdout] 415 |     map.visit_neighbor_values("abc", 1, |s| {v.push(s.clone())});
[INFO] [stdout]     |                                                      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:419:54
[INFO] [stdout]     |
[INFO] [stdout] 419 |     map.visit_neighbor_values("abc", 2, |s| {v.push(s.clone())});
[INFO] [stdout]     |                                                      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:423:54
[INFO] [stdout]     |
[INFO] [stdout] 423 |     map.visit_neighbor_values("abc", 3, |s| {v.push(s.clone())});
[INFO] [stdout]     |                                                      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:427:55
[INFO] [stdout]     |
[INFO] [stdout] 427 |     map.visit_neighbor_values("xxxx", 4, |s| {v.push(s.clone())});
[INFO] [stdout]     |                                                       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:431:51
[INFO] [stdout]     |
[INFO] [stdout] 431 |     map.visit_neighbor_values("", 0, |s| {v.push(s.clone())});
[INFO] [stdout]     |                                                   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:435:51
[INFO] [stdout]     |
[INFO] [stdout] 435 |     map.visit_neighbor_values("", 1, |s| {v.push(s.clone())});
[INFO] [stdout]     |                                                   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:439:51
[INFO] [stdout]     |
[INFO] [stdout] 439 |     map.visit_neighbor_values("", 2, |s| {v.push(s.clone())});
[INFO] [stdout]     |                                                   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:443:51
[INFO] [stdout]     |
[INFO] [stdout] 443 |     map.visit_neighbor_values("", 3, |s| {v.push(s.clone())});
[INFO] [stdout]     |                                                   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:447:51
[INFO] [stdout]     |
[INFO] [stdout] 447 |     map.visit_neighbor_values("", 4, |s| {v.push(s.clone())});
[INFO] [stdout]     |                                                   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:460:53
[INFO] [stdout]     |
[INFO] [stdout] 460 |     map.visit_crossword_values("", '?', |s| v.push(s.clone()));
[INFO] [stdout]     |                                                     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:464:54
[INFO] [stdout]     |
[INFO] [stdout] 464 |     map.visit_crossword_values("?", '?', |s| v.push(s.clone()));
[INFO] [stdout]     |                                                      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:468:55
[INFO] [stdout]     |
[INFO] [stdout] 468 |     map.visit_crossword_values("a?", '?', |s| v.push(s.clone()));
[INFO] [stdout]     |                                                       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:472:56
[INFO] [stdout]     |
[INFO] [stdout] 472 |     map.visit_crossword_values("a?a", '?', |s| v.push(s.clone()));
[INFO] [stdout]     |                                                        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:476:56
[INFO] [stdout]     |
[INFO] [stdout] 476 |     map.visit_crossword_values("?a?", '?', |s| v.push(s.clone()));
[INFO] [stdout]     |                                                        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:480:56
[INFO] [stdout]     |
[INFO] [stdout] 480 |     map.visit_crossword_values("???", '?', |s| v.push(s.clone()));
[INFO] [stdout]     |                                                        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:484:57
[INFO] [stdout]     |
[INFO] [stdout] 484 |     map.visit_crossword_values("????", '?', |s| v.push(s.clone()));
[INFO] [stdout]     |                                                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]    --> tests/tests.rs:488:56
[INFO] [stdout]     |
[INFO] [stdout] 488 |     map.visit_crossword_values("aba", 'b', |s| v.push(s.clone()));
[INFO] [stdout]     |                                                        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]     --> tests/tests.rs:1762:34
[INFO] [stdout]      |
[INFO] [stdout] 1762 |     map.visit_values(|s| v.push(s.clone()));
[INFO] [stdout]      |                                  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 21 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `Command { std: "docker" "inspect" "08cc22d36fb9cc80e36cbec73367a0dc1f6844aa73bc49e9276ae5685d16f76e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08cc22d36fb9cc80e36cbec73367a0dc1f6844aa73bc49e9276ae5685d16f76e", kill_on_drop: false }`
[INFO] [stdout] 08cc22d36fb9cc80e36cbec73367a0dc1f6844aa73bc49e9276ae5685d16f76e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "RUSTDOCFLAGS=--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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0fca603a1e9681d40177acae24fed8bc01befc02b1ce56853f42f5982195648a
[INFO] running `Command { std: "docker" "start" "-a" "0fca603a1e9681d40177acae24fed8bc01befc02b1ce56853f42f5982195648a", kill_on_drop: false }`
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:376:34
[INFO] [stderr]     |
[INFO] [stderr] 376 |     map.visit_values(|s| v.push(s.clone()));
[INFO] [stderr]     |                                  ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:394:50
[INFO] [stderr]     |
[INFO] [stderr] 394 |     map.visit_complete_values("ab", |s| {v.push(s.clone())});
[INFO] [stderr]     |                                                  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:398:48
[INFO] [stderr]     |
[INFO] [stderr] 398 |     map.visit_complete_values("", |s| {v.push(s.clone())});
[INFO] [stderr]     |                                                ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:415:54
[INFO] [stderr]     |
[INFO] [stderr] 415 |     map.visit_neighbor_values("abc", 1, |s| {v.push(s.clone())});
[INFO] [stderr]     |                                                      ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:419:54
[INFO] [stderr]     |
[INFO] [stderr] 419 |     map.visit_neighbor_values("abc", 2, |s| {v.push(s.clone())});
[INFO] [stderr]     |                                                      ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:423:54
[INFO] [stderr]     |
[INFO] [stderr] 423 |     map.visit_neighbor_values("abc", 3, |s| {v.push(s.clone())});
[INFO] [stderr]     |                                                      ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:427:55
[INFO] [stderr]     |
[INFO] [stderr] 427 |     map.visit_neighbor_values("xxxx", 4, |s| {v.push(s.clone())});
[INFO] [stderr]     |                                                       ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:431:51
[INFO] [stderr]     |
[INFO] [stderr] 431 |     map.visit_neighbor_values("", 0, |s| {v.push(s.clone())});
[INFO] [stderr]     |                                                   ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:435:51
[INFO] [stderr]     |
[INFO] [stderr] 435 |     map.visit_neighbor_values("", 1, |s| {v.push(s.clone())});
[INFO] [stderr]     |                                                   ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:439:51
[INFO] [stderr]     |
[INFO] [stderr] 439 |     map.visit_neighbor_values("", 2, |s| {v.push(s.clone())});
[INFO] [stderr]     |                                                   ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:443:51
[INFO] [stderr]     |
[INFO] [stderr] 443 |     map.visit_neighbor_values("", 3, |s| {v.push(s.clone())});
[INFO] [stderr]     |                                                   ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:447:51
[INFO] [stderr]     |
[INFO] [stderr] 447 |     map.visit_neighbor_values("", 4, |s| {v.push(s.clone())});
[INFO] [stderr]     |                                                   ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:460:53
[INFO] [stderr]     |
[INFO] [stderr] 460 |     map.visit_crossword_values("", '?', |s| v.push(s.clone()));
[INFO] [stderr]     |                                                     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:464:54
[INFO] [stderr]     |
[INFO] [stderr] 464 |     map.visit_crossword_values("?", '?', |s| v.push(s.clone()));
[INFO] [stderr]     |                                                      ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:468:55
[INFO] [stderr]     |
[INFO] [stderr] 468 |     map.visit_crossword_values("a?", '?', |s| v.push(s.clone()));
[INFO] [stderr]     |                                                       ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:472:56
[INFO] [stderr]     |
[INFO] [stderr] 472 |     map.visit_crossword_values("a?a", '?', |s| v.push(s.clone()));
[INFO] [stderr]     |                                                        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:476:56
[INFO] [stderr]     |
[INFO] [stderr] 476 |     map.visit_crossword_values("?a?", '?', |s| v.push(s.clone()));
[INFO] [stderr]     |                                                        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:480:56
[INFO] [stderr]     |
[INFO] [stderr] 480 |     map.visit_crossword_values("???", '?', |s| v.push(s.clone()));
[INFO] [stderr]     |                                                        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:484:57
[INFO] [stderr]     |
[INFO] [stderr] 484 |     map.visit_crossword_values("????", '?', |s| v.push(s.clone()));
[INFO] [stderr]     |                                                         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]    --> tests/tests.rs:488:56
[INFO] [stderr]     |
[INFO] [stderr] 488 |     map.visit_crossword_values("aba", 'b', |s| v.push(s.clone()));
[INFO] [stderr]     |                                                        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stderr]     --> tests/tests.rs:1762:34
[INFO] [stderr]      |
[INFO] [stderr] 1762 |     map.visit_values(|s| v.push(s.clone()));
[INFO] [stderr]      |                                  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `ternary-tree` (test "tests") generated 21 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/ternary_tree-843d53b320b39845)
[INFO] [stderr]      Running tests/tests.rs (/opt/rustwide/target/debug/deps/tests-ddf02ad3b21ec1c3)
[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] [stdout] 
[INFO] [stdout] running 35 tests
[INFO] [stdout] test tst_clear_some_map ... ok
[INFO] [stdout] test tst_fix_unicode_chars_in_key_bug ... ok
[INFO] [stdout] test tst_insert_and_remove_more_key_value ... ok
[INFO] [stdout] test tst_insert_and_remove_some_key_value ... ok
[INFO] [stdout] test tst_insert_some_key_value ... ok
[INFO] [stdout] test tst_create_with_macro ... ok
[INFO] [stdout] test tst_iterate_and_read_current_key ... ok
[INFO] [stdout] test tst_iterate_and_read_current_key_back ... ok
[INFO] [stdout] test tst_iterate_over_empty_tree ... ok
[INFO] [stdout] test tst_insert_and_get_more_key_value ... ok
[INFO] [stdout] test tst_iterate_over_values ... ok
[INFO] [stdout] test tst_iterate_over_values_backward ... ok
[INFO] [stdout] test tst_get_some_value_by_key ... ok
[INFO] [stdout] test tst_iterate_over_values_backward_with_rev ... ok
[INFO] [stdout] test tst_iterate_over_values_with_peek_and_co ... ok
[INFO] [stdout] test tst_iterate_with_complete ... ok
[INFO] [stdout] test tst_iterate_over_values_with_for_loop ... ok
[INFO] [stdout] test tst_iterate_with_crossword ... ok
[INFO] [stdout] test tst_iterate_over_values_from_both_end ... ok
[INFO] [stdout] test tst_iterate_with_crossword_backward ... ok
[INFO] [stdout] test tst_current_key_iterators ... ok
[INFO] [stdout] test tst_get_value_back_on_empty_key ... ok
[INFO] [stdout] test tst_iterate_with_crossword_from_both_end ... ok
[INFO] [stdout] test tst_replace_some_value ... ok
[INFO] [stdout] test tst_update_some_values ... ok
[INFO] [stdout] test tst_create_empty_map ... ok
[INFO] [stdout] test tst_visit_crossword_values ... ok
[INFO] [stdout] test tst_visit_complete_values ... ok
[INFO] [stdout] test tst_visit_neighbor_values ... ok
[INFO] [stdout] test tst_iterate_with_neighbor ... ok
[INFO] [stdout] test tst_iterate_with_neighbor_backward ... ok
[INFO] [stdout] test tst_stats_on_insert_and_remove ... ok
[INFO] [stdout] test tst_pretty_print ... ok
[INFO] [stdout] test tst_iterate_with_neighbor_from_both_end ... ok
[INFO] [stdout] test tst_visit_values ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 35 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests ternary_tree
[INFO] [stdout] 
[INFO] [stdout] running 23 tests
[INFO] [stdout] test src/lib.rs - Tst<T>::get (line 930) ... ok
[INFO] [stdout] test src/lib.rs - Tst<T>::insert (line 878) ... ok
[INFO] [stdout] test src/lib.rs - Tst<T>::clear (line 1066) ... ok
[INFO] [stdout] test src/lib.rs - Tst<T>::get_mut (line 953) ... ok
[INFO] [stdout] test src/lib.rs - Tst<T>::insert (line 891) ... ok
[INFO] [stdout] test src/lib.rs - Tst<T>::iter (line 1336) ... ok
[INFO] [stdout] test src/lib.rs - (line 57) ... FAILED
[INFO] [stdout] test src/lib.rs - Tst<T>::iter_complete (line 1370) ... ok
[INFO] [stdout] test src/lib.rs - Tst<T>::len (line 1019) ... ok
[INFO] [stdout] test src/lib.rs - Tst<T>::new (line 862) ... ok
[INFO] [stdout] test src/lib.rs - Tst<T>::iter_neighbor (line 1407) ... ok
[INFO] [stdout] test src/lib.rs - Tst<T>::new (line 856) ... ok
[INFO] [stdout] test src/lib.rs - Tst<T>::remove (line 981) ... ok
[INFO] [stdout] test src/lib.rs - Tst<T>::iter_crossword (line 1443) ... ok
[INFO] [stdout] test src/lib.rs - Tst<T>::stat (line 1037) ... ok
[INFO] [stdout] test src/lib.rs - Tst<T>::visit_complete_values (line 1121) ... ok
[INFO] [stdout] test src/lib.rs - Tst<T>::visit_complete_values (line 1134) ... ok
[INFO] [stdout] test src/lib.rs - Tst<T>::visit_neighbor_values (line 1206) ... ok
[INFO] [stdout] test src/lib.rs - Tst<T>::visit_crossword_values (line 1263) ... ok
[INFO] [stdout] test src/lib.rs - Tst<T>::visit_crossword_values (line 1251) ... ok
[INFO] [stdout] test src/lib.rs - Tst<T>::visit_neighbor_values (line 1192) ... ok
[INFO] [stdout] test src/lib.rs - tst (line 1470) ... ok
[INFO] [stdout] test src/lib.rs - Tst<T>::visit_values (line 1088) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 57) stdout ----
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]   --> src/lib.rs:87:52
[INFO] [stdout]    |
[INFO] [stdout] 32 | map.visit_crossword_values("a?a", '?', |s| v.push(s.clone()));
[INFO] [stdout]    |                                                    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] Test executable failed (exit status: 101).
[INFO] [stdout] 
[INFO] [stdout] stderr:
[INFO] [stdout] thread 'main' panicked at src/lib.rs:26:40:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5555ef65ec65 - std::backtrace_rs::backtrace::libunwind::trace::h59d96bdb08384354
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
[INFO] [stdout]    1:     0x5555ef65ec65 - std::backtrace_rs::backtrace::trace_unsynchronized::h9cf5becacfc93fba
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x5555ef65ec65 - std::sys_common::backtrace::_print_fmt::h10b76d10405dbd48
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x5555ef65ec65 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h6ed9e62a156d84e4
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x5555ef67c17b - core::fmt::rt::Argument::fmt::h645c680983f03c9f
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/fmt/rt.rs:165:63
[INFO] [stdout]    5:     0x5555ef67c17b - core::fmt::write::h8bcd80919a02be29
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/fmt/mod.rs:1169:21
[INFO] [stdout]    6:     0x5555ef65ceef - std::io::Write::write_fmt::hed769ca6c29434ec
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/io/mod.rs:1835:15
[INFO] [stdout]    7:     0x5555ef65ea3e - std::sys_common::backtrace::_print::h6306f131a28d62b0
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x5555ef65ea3e - std::sys_common::backtrace::print::h7079288e0a26dfcc
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x5555ef65fda9 - std::panicking::default_hook::{{closure}}::hb063ecec81a736ba
[INFO] [stdout]   10:     0x5555ef65faed - std::panicking::default_hook::hd56ee406bf547b5c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:298:9
[INFO] [stdout]   11:     0x5555ef660243 - std::panicking::rust_panic_with_hook::h624aa3ca42ebb8f2
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:795:13
[INFO] [stdout]   12:     0x5555ef660124 - std::panicking::begin_panic_handler::{{closure}}::hbc4e76194a5e287c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:664:13
[INFO] [stdout]   13:     0x5555ef65f129 - std::sys_common::backtrace::__rust_end_short_backtrace::h847fedc9d1ff7b6d
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   14:     0x5555ef65fe57 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:652:5
[INFO] [stdout]   15:     0x5555ef63bb63 - core::panicking::panic_fmt::hec11a924b87ce965
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panicking.rs:72:14
[INFO] [stdout]   16:     0x5555ef63c056 - core::result::unwrap_failed::h382691b96ca8c13a
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/result.rs:1654:5
[INFO] [stdout]   17:     0x5555ef644e1a - rust_out::main::_doctest_main_src_lib_rs_57_0::h28072ae71530f0d5
[INFO] [stdout]   18:     0x5555ef644cc6 - rust_out::main::h696a342f0ae7cd72
[INFO] [stdout]   19:     0x5555ef641153 - core::ops::function::FnOnce::call_once::hacff659aa20c7b40
[INFO] [stdout]   20:     0x5555ef63f536 - std::sys_common::backtrace::__rust_begin_short_backtrace::hcc6b8bea3112e884
[INFO] [stdout]   21:     0x5555ef640529 - std::rt::lang_start::{{closure}}::h4db0ca8543e29a47
[INFO] [stdout]   22:     0x5555ef65abbd - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h239f0051f1e18680
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:284:13
[INFO] [stdout]   23:     0x5555ef65abbd - std::panicking::try::do_call::hf7072797cbfea7fa
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:559:40
[INFO] [stdout]   24:     0x5555ef65abbd - std::panicking::try::h3a37e38691a5244b
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:523:19
[INFO] [stdout]   25:     0x5555ef65abbd - std::panic::catch_unwind::hc7cc1460e4236209
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panic.rs:149:14
[INFO] [stdout]   26:     0x5555ef65abbd - std::rt::lang_start_internal::{{closure}}::hce632608b277cffc
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/rt.rs:141:48
[INFO] [stdout]   27:     0x5555ef65abbd - std::panicking::try::do_call::hafc0f13e6abd9d79
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:559:40
[INFO] [stdout]   28:     0x5555ef65abbd - std::panicking::try::h67b8f1800ef15799
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:523:19
[INFO] [stdout]   29:     0x5555ef65abbd - std::panic::catch_unwind::he5b260dc522c68be
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panic.rs:149:14
[INFO] [stdout]   30:     0x5555ef65abbd - std::rt::lang_start_internal::hf119eb75d1ffe221
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/rt.rs:141:20
[INFO] [stdout]   31:     0x5555ef640507 - std::rt::lang_start::ha9360cc92730957e
[INFO] [stdout]   32:     0x5555ef645335 - main
[INFO] [stdout]   33:     0x7f8cb250ed90 - <unknown>
[INFO] [stdout]   34:     0x7f8cb250ee40 - __libc_start_main
[INFO] [stdout]   35:     0x5555ef63c2b5 - _start
[INFO] [stdout]   36:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 57)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 22 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.48s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "0fca603a1e9681d40177acae24fed8bc01befc02b1ce56853f42f5982195648a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fca603a1e9681d40177acae24fed8bc01befc02b1ce56853f42f5982195648a", kill_on_drop: false }`
[INFO] [stdout] 0fca603a1e9681d40177acae24fed8bc01befc02b1ce56853f42f5982195648a
