[INFO] fetching crate pi_link_list 0.1.9...
[INFO] testing pi_link_list-0.1.9 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-8
[INFO] extracting crate pi_link_list 0.1.9 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate pi_link_list 0.1.9
[INFO] finished tweaking crates.io crate pi_link_list 0.1.9
[INFO] tweaked toml for crates.io crate pi_link_list 0.1.9 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate pi_link_list 0.1.9 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 25 packages to latest compatible versions
[INFO] [stderr]       Adding getrandom v0.2.16 (available: v0.3.4)
[INFO] [stderr]       Adding pi_slotmap v0.1.17 (available: v0.2.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pi_key_alloter v0.5.2
[INFO] [stderr]   Downloaded pi_null v0.1.12
[INFO] [stderr]   Downloaded pi_print_any v0.1.2
[INFO] [stderr]   Downloaded pi_share v0.4.16
[INFO] [stderr]   Downloaded pi_slotmap v0.1.17
[INFO] [stderr]   Downloaded derive-deref-rs v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4eb3bbecdb9738c716a167eeb79fd735a1078998c057c848d3f6d05bbc871100
[INFO] running `Command { std: "docker" "start" "-a" "4eb3bbecdb9738c716a167eeb79fd735a1078998c057c848d3f6d05bbc871100", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4eb3bbecdb9738c716a167eeb79fd735a1078998c057c848d3f6d05bbc871100", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4eb3bbecdb9738c716a167eeb79fd735a1078998c057c848d3f6d05bbc871100", kill_on_drop: false }`
[INFO] [stdout] 4eb3bbecdb9738c716a167eeb79fd735a1078998c057c848d3f6d05bbc871100
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d075de655b3a2456865b2109e9d29cd1c4700891248bd626602ae835fda5ef7e
[INFO] running `Command { std: "docker" "start" "-a" "d075de655b3a2456865b2109e9d29cd1c4700891248bd626602ae835fda5ef7e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.177
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling pi_null v0.1.12
[INFO] [stderr]    Compiling pi_print_any v0.1.2
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling derive-deref-rs v0.1.1
[INFO] [stderr]    Compiling pi_link_list v0.1.9 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.79s
[INFO] running `Command { std: "docker" "inspect" "d075de655b3a2456865b2109e9d29cd1c4700891248bd626602ae835fda5ef7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d075de655b3a2456865b2109e9d29cd1c4700891248bd626602ae835fda5ef7e", kill_on_drop: false }`
[INFO] [stdout] d075de655b3a2456865b2109e9d29cd1c4700891248bd626602ae835fda5ef7e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 951a6c84d6b2b50fe9f806960c06961df53efaefcc0539c74adbdbf0cb626783
[INFO] running `Command { std: "docker" "start" "-a" "951a6c84d6b2b50fe9f806960c06961df53efaefcc0539c74adbdbf0cb626783", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling pi_slotmap v0.1.17
[INFO] [stderr]    Compiling pi_share v0.4.16
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling syn v2.0.110
[INFO] [stderr]    Compiling crossbeam-queue v0.3.12
[INFO] [stderr]    Compiling crossbeam-channel v0.5.15
[INFO] [stderr]    Compiling crossbeam-deque v0.8.6
[INFO] [stderr]    Compiling crossbeam v0.8.4
[INFO] [stderr]    Compiling pi_key_alloter v0.5.2
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling pi_link_list v0.1.9 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0782]: expected a type, found a trait
[INFO] [stdout]    --> src/lib.rs:520:29
[INFO] [stdout]     |
[INFO] [stdout] 520 |         link_list.link_before(k1, Key::null(), &mut map);
[INFO] [stdout]     |                                   ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: you can add the `dyn` keyword if you want a trait object
[INFO] [stdout]     |
[INFO] [stdout] 520 |         link_list.link_before(k1, <dyn Key>::null(), &mut map);
[INFO] [stdout]     |                                   ++++    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `null` found for struct `DefaultKey` in the current scope
[INFO] [stdout]    --> src/lib.rs:526:21
[INFO] [stdout]     |
[INFO] [stdout] 526 |             (k1, DefaultKey::null(), DefaultKey::null())
[INFO] [stdout]     |                              ^^^^ function or associated item not found in `DefaultKey`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Null` which provides `null` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]     |
[INFO] [stdout] 508 +     use pi_null::Null;
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `is_null` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 526 |             (k1, DefaultKey::is_null(), DefaultKey::null())
[INFO] [stdout]     |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `null` found for struct `DefaultKey` in the current scope
[INFO] [stdout]    --> src/lib.rs:526:41
[INFO] [stdout]     |
[INFO] [stdout] 526 |             (k1, DefaultKey::null(), DefaultKey::null())
[INFO] [stdout]     |                                                  ^^^^ function or associated item not found in `DefaultKey`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Null` which provides `null` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]     |
[INFO] [stdout] 508 +     use pi_null::Null;
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `is_null` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 526 |             (k1, DefaultKey::null(), DefaultKey::is_null())
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0782]: expected a type, found a trait
[INFO] [stdout]    --> src/lib.rs:533:29
[INFO] [stdout]     |
[INFO] [stdout] 533 |         link_list.link_before(k2, Key::null(), &mut map);
[INFO] [stdout]     |                                   ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: you can add the `dyn` keyword if you want a trait object
[INFO] [stdout]     |
[INFO] [stdout] 533 |         link_list.link_before(k2, <dyn Key>::null(), &mut map);
[INFO] [stdout]     |                                   ++++    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `null` found for struct `DefaultKey` in the current scope
[INFO] [stdout]    --> src/lib.rs:539:21
[INFO] [stdout]     |
[INFO] [stdout] 539 |             (k1, DefaultKey::null(), k2),
[INFO] [stdout]     |                              ^^^^ function or associated item not found in `DefaultKey`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Null` which provides `null` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]     |
[INFO] [stdout] 508 +     use pi_null::Null;
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `is_null` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 539 |             (k1, DefaultKey::is_null(), k2),
[INFO] [stdout]     |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `null` found for struct `DefaultKey` in the current scope
[INFO] [stdout]    --> src/lib.rs:540:25
[INFO] [stdout]     |
[INFO] [stdout] 540 |             (k2, k1, DefaultKey::null())
[INFO] [stdout]     |                                  ^^^^ function or associated item not found in `DefaultKey`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Null` which provides `null` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]     |
[INFO] [stdout] 508 +     use pi_null::Null;
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `is_null` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 540 |             (k2, k1, DefaultKey::is_null())
[INFO] [stdout]     |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `null` found for struct `DefaultKey` in the current scope
[INFO] [stdout]    --> src/lib.rs:552:21
[INFO] [stdout]     |
[INFO] [stdout] 552 |             (k1, DefaultKey::null(), k3),
[INFO] [stdout]     |                              ^^^^ function or associated item not found in `DefaultKey`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Null` which provides `null` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]     |
[INFO] [stdout] 508 +     use pi_null::Null;
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `is_null` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 552 |             (k1, DefaultKey::is_null(), k3),
[INFO] [stdout]     |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `null` found for struct `DefaultKey` in the current scope
[INFO] [stdout]    --> src/lib.rs:553:25
[INFO] [stdout]     |
[INFO] [stdout] 553 |             (k2, k3, DefaultKey::null()),
[INFO] [stdout]     |                                  ^^^^ function or associated item not found in `DefaultKey`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Null` which provides `null` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]     |
[INFO] [stdout] 508 +     use pi_null::Null;
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `is_null` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 553 |             (k2, k3, DefaultKey::is_null()),
[INFO] [stdout]     |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `null` found for struct `DefaultKey` in the current scope
[INFO] [stdout]    --> src/lib.rs:568:25
[INFO] [stdout]     |
[INFO] [stdout] 568 |             (k2, k3, DefaultKey::null()),
[INFO] [stdout]     |                                  ^^^^ function or associated item not found in `DefaultKey`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Null` which provides `null` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]     |
[INFO] [stdout] 508 +     use pi_null::Null;
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `is_null` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 568 |             (k2, k3, DefaultKey::is_null()),
[INFO] [stdout]     |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `null` found for struct `DefaultKey` in the current scope
[INFO] [stdout]    --> src/lib.rs:570:21
[INFO] [stdout]     |
[INFO] [stdout] 570 |             (k4, DefaultKey::null(), k1),
[INFO] [stdout]     |                              ^^^^ function or associated item not found in `DefaultKey`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Null` which provides `null` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]     |
[INFO] [stdout] 508 +     use pi_null::Null;
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `is_null` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 570 |             (k4, DefaultKey::is_null(), k1),
[INFO] [stdout]     |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `null` found for struct `DefaultKey` in the current scope
[INFO] [stdout]    --> src/lib.rs:585:25
[INFO] [stdout]     |
[INFO] [stdout] 585 |             (k2, k1, DefaultKey::null()),
[INFO] [stdout]     |                                  ^^^^ function or associated item not found in `DefaultKey`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Null` which provides `null` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]     |
[INFO] [stdout] 508 +     use pi_null::Null;
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `is_null` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 585 |             (k2, k1, DefaultKey::is_null()),
[INFO] [stdout]     |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `null` found for struct `DefaultKey` in the current scope
[INFO] [stdout]    --> src/lib.rs:586:21
[INFO] [stdout]     |
[INFO] [stdout] 586 |             (k4, DefaultKey::null(), k1),
[INFO] [stdout]     |                              ^^^^ function or associated item not found in `DefaultKey`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Null` which provides `null` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]     |
[INFO] [stdout] 508 +     use pi_null::Null;
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `is_null` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 586 |             (k4, DefaultKey::is_null(), k1),
[INFO] [stdout]     |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `null` found for struct `DefaultKey` in the current scope
[INFO] [stdout]    --> src/lib.rs:598:21
[INFO] [stdout]     |
[INFO] [stdout] 598 |             (k1, DefaultKey::null(), k2),
[INFO] [stdout]     |                              ^^^^ function or associated item not found in `DefaultKey`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Null` which provides `null` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]     |
[INFO] [stdout] 508 +     use pi_null::Null;
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `is_null` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 598 |             (k1, DefaultKey::is_null(), k2),
[INFO] [stdout]     |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `null` found for struct `DefaultKey` in the current scope
[INFO] [stdout]    --> src/lib.rs:599:25
[INFO] [stdout]     |
[INFO] [stdout] 599 |             (k2, k1, DefaultKey::null()),
[INFO] [stdout]     |                                  ^^^^ function or associated item not found in `DefaultKey`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Null` which provides `null` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]     |
[INFO] [stdout] 508 +     use pi_null::Null;
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `is_null` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 599 |             (k2, k1, DefaultKey::is_null()),
[INFO] [stdout]     |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `null` found for struct `DefaultKey` in the current scope
[INFO] [stdout]    --> src/lib.rs:611:21
[INFO] [stdout]     |
[INFO] [stdout] 611 |             (k1, DefaultKey::null(), DefaultKey::null())
[INFO] [stdout]     |                              ^^^^ function or associated item not found in `DefaultKey`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Null` which provides `null` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]     |
[INFO] [stdout] 508 +     use pi_null::Null;
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `is_null` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 611 |             (k1, DefaultKey::is_null(), DefaultKey::null())
[INFO] [stdout]     |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `null` found for struct `DefaultKey` in the current scope
[INFO] [stdout]    --> src/lib.rs:611:41
[INFO] [stdout]     |
[INFO] [stdout] 611 |             (k1, DefaultKey::null(), DefaultKey::null())
[INFO] [stdout]     |                                                  ^^^^ function or associated item not found in `DefaultKey`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Null` which provides `null` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]     |
[INFO] [stdout] 508 +     use pi_null::Null;
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `is_null` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 611 |             (k1, DefaultKey::null(), DefaultKey::is_null())
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `null` found for struct `DefaultKey` in the current scope
[INFO] [stdout]    --> src/lib.rs:618:26
[INFO] [stdout]     |
[INFO] [stdout] 618 |         assert_eq!(DefaultKey::null(), link_list.head());
[INFO] [stdout]     |                                ^^^^ function or associated item not found in `DefaultKey`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Null` which provides `null` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]     |
[INFO] [stdout] 508 +     use pi_null::Null;
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `is_null` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 618 |         assert_eq!(DefaultKey::is_null(), link_list.head());
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `null` found for struct `DefaultKey` in the current scope
[INFO] [stdout]    --> src/lib.rs:619:26
[INFO] [stdout]     |
[INFO] [stdout] 619 |         assert_eq!(DefaultKey::null(), link_list.tail());
[INFO] [stdout]     |                                ^^^^ function or associated item not found in `DefaultKey`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Null` which provides `null` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]     |
[INFO] [stdout] 508 +     use pi_null::Null;
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `is_null` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 619 |         assert_eq!(DefaultKey::is_null(), link_list.tail());
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0782]: expected a type, found a trait
[INFO] [stdout]    --> src/lib.rs:630:30
[INFO] [stdout]     |
[INFO] [stdout] 630 |         link_list1.link_before(k1, Key::null(), &mut map);
[INFO] [stdout]     |                                    ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: you can add the `dyn` keyword if you want a trait object
[INFO] [stdout]     |
[INFO] [stdout] 630 |         link_list1.link_before(k1, <dyn Key>::null(), &mut map);
[INFO] [stdout]     |                                    ++++    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0782]: expected a type, found a trait
[INFO] [stdout]    --> src/lib.rs:632:30
[INFO] [stdout]     |
[INFO] [stdout] 632 |         link_list1.link_before(k2, Key::null(), &mut map);
[INFO] [stdout]     |                                    ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: you can add the `dyn` keyword if you want a trait object
[INFO] [stdout]     |
[INFO] [stdout] 632 |         link_list1.link_before(k2, <dyn Key>::null(), &mut map);
[INFO] [stdout]     |                                    ++++    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0782]: expected a type, found a trait
[INFO] [stdout]    --> src/lib.rs:637:30
[INFO] [stdout]     |
[INFO] [stdout] 637 |         link_list2.link_before(k3, Key::null(), &mut map);
[INFO] [stdout]     |                                    ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: you can add the `dyn` keyword if you want a trait object
[INFO] [stdout]     |
[INFO] [stdout] 637 |         link_list2.link_before(k3, <dyn Key>::null(), &mut map);
[INFO] [stdout]     |                                    ++++    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0782]: expected a type, found a trait
[INFO] [stdout]    --> src/lib.rs:639:30
[INFO] [stdout]     |
[INFO] [stdout] 639 |         link_list2.link_before(k4, Key::null(), &mut map);
[INFO] [stdout]     |                                    ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: you can add the `dyn` keyword if you want a trait object
[INFO] [stdout]     |
[INFO] [stdout] 639 |         link_list2.link_before(k4, <dyn Key>::null(), &mut map);
[INFO] [stdout]     |                                    ++++    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0599, E0782.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pi_link_list` (lib test) due to 22 previous errors
[INFO] running `Command { std: "docker" "inspect" "951a6c84d6b2b50fe9f806960c06961df53efaefcc0539c74adbdbf0cb626783", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "951a6c84d6b2b50fe9f806960c06961df53efaefcc0539c74adbdbf0cb626783", kill_on_drop: false }`
[INFO] [stdout] 951a6c84d6b2b50fe9f806960c06961df53efaefcc0539c74adbdbf0cb626783
