[INFO] fetching crate superset_map 0.2.1...
[INFO] testing superset_map-0.2.1 against 1.76.0 for beta-1.77-1
[INFO] extracting crate superset_map 0.2.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate superset_map 0.2.1 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate superset_map 0.2.1
[INFO] finished tweaking crates.io crate superset_map 0.2.1
[INFO] tweaked toml for crates.io crate superset_map 0.2.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded zfc v0.3.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4979f5536bd2ec8f03a68a77b100017e5ebca6c4529a57baa8d07750282ebbff
[INFO] running `Command { std: "docker" "start" "-a" "4979f5536bd2ec8f03a68a77b100017e5ebca6c4529a57baa8d07750282ebbff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4979f5536bd2ec8f03a68a77b100017e5ebca6c4529a57baa8d07750282ebbff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4979f5536bd2ec8f03a68a77b100017e5ebca6c4529a57baa8d07750282ebbff", kill_on_drop: false }`
[INFO] [stdout] 4979f5536bd2ec8f03a68a77b100017e5ebca6c4529a57baa8d07750282ebbff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b9c7740b8ad5794fb596e8f45aa4936bb2ae126f51efc1f84a12f62af1aa5b0d
[INFO] running `Command { std: "docker" "start" "-a" "b9c7740b8ad5794fb596e8f45aa4936bb2ae126f51efc1f84a12f62af1aa5b0d", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling zfc v0.3.1
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling superset_map v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:137:12
[INFO] [stdout]     |
[INFO] [stdout] 137 | #![feature(btree_cursors)]
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `superset_map` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "b9c7740b8ad5794fb596e8f45aa4936bb2ae126f51efc1f84a12f62af1aa5b0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9c7740b8ad5794fb596e8f45aa4936bb2ae126f51efc1f84a12f62af1aa5b0d", kill_on_drop: false }`
[INFO] [stdout] b9c7740b8ad5794fb596e8f45aa4936bb2ae126f51efc1f84a12f62af1aa5b0d
[INFO] testing superset_map-0.2.1 against beta-2024-02-10 for beta-1.77-1
[INFO] extracting crate superset_map 0.2.1 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate superset_map 0.2.1 on toolchain beta-2024-02-10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate superset_map 0.2.1
[INFO] finished tweaking crates.io crate superset_map 0.2.1
[INFO] tweaked toml for crates.io crate superset_map 0.2.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-02-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 37b1e64f4bbadf1bc4e00291f8f85889d780af7e0f08039f85b5a702e77b1fce
[INFO] running `Command { std: "docker" "start" "-a" "37b1e64f4bbadf1bc4e00291f8f85889d780af7e0f08039f85b5a702e77b1fce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37b1e64f4bbadf1bc4e00291f8f85889d780af7e0f08039f85b5a702e77b1fce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37b1e64f4bbadf1bc4e00291f8f85889d780af7e0f08039f85b5a702e77b1fce", kill_on_drop: false }`
[INFO] [stdout] 37b1e64f4bbadf1bc4e00291f8f85889d780af7e0f08039f85b5a702e77b1fce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-02-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2fbab27bef408fb544b2f9a53ca7ed97dd3c5fd3087e1653c79a9ff4bbd605b8
[INFO] running `Command { std: "docker" "start" "-a" "2fbab27bef408fb544b2f9a53ca7ed97dd3c5fd3087e1653c79a9ff4bbd605b8", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling zfc v0.3.1
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling superset_map v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:137:12
[INFO] [stdout]     |
[INFO] [stdout] 137 | #![feature(btree_cursors)]
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `key_value` found for struct `superset_map::alloc::collections::btree_map::Cursor` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:324:14
[INFO] [stdout]     |
[INFO] [stdout] 322 | /         self.map
[INFO] [stdout] 323 | |             .upper_bound(Bound::Excluded(key))
[INFO] [stdout] 324 | |             .key_value()
[INFO] [stdout]     | |             -^^^^^^^^^ method not found in `Cursor<'_, K, V>`
[INFO] [stdout]     | |_____________|
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `key_value` found for struct `superset_map::alloc::collections::btree_map::Cursor` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:347:14
[INFO] [stdout]     |
[INFO] [stdout] 345 | /         self.map
[INFO] [stdout] 346 | |             .upper_bound(Bound::Included(key))
[INFO] [stdout] 347 | |             .key_value()
[INFO] [stdout]     | |             -^^^^^^^^^ method not found in `Cursor<'_, K, V>`
[INFO] [stdout]     | |_____________|
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `key_value` found for struct `superset_map::alloc::collections::btree_map::Cursor` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:371:14
[INFO] [stdout]     |
[INFO] [stdout] 369 | /         self.map
[INFO] [stdout] 370 | |             .lower_bound(Bound::Excluded(key))
[INFO] [stdout] 371 | |             .key_value()
[INFO] [stdout]     | |             -^^^^^^^^^ method not found in `Cursor<'_, K, V>`
[INFO] [stdout]     | |_____________|
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `key_value` found for struct `superset_map::alloc::collections::btree_map::Cursor` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:394:14
[INFO] [stdout]     |
[INFO] [stdout] 392 | /         self.map
[INFO] [stdout] 393 | |             .lower_bound(Bound::Included(key))
[INFO] [stdout] 394 | |             .key_value()
[INFO] [stdout]     | |             -^^^^^^^^^ method not found in `Cursor<'_, K, V>`
[INFO] [stdout]     | |_____________|
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `key` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:415:34
[INFO] [stdout]     |
[INFO] [stdout] 415 |         if let Some(ge) = cursor.key() {
[INFO] [stdout]     |                                  ^^^ method not found in `CursorMut<'_, K, V>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `move_prev` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:420:16
[INFO] [stdout]     |
[INFO] [stdout] 420 |         cursor.move_prev();
[INFO] [stdout]     |                ^^^^^^^^^ help: there is a method with a similar name: `remove_prev`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `key` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:421:37
[INFO] [stdout]     |
[INFO] [stdout] 421 |         while let Some(lt) = cursor.key() {
[INFO] [stdout]     |                                     ^^^ method not found in `CursorMut<'_, K, V>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_current_and_move_back` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:423:24
[INFO] [stdout]     |
[INFO] [stdout] 423 |                 cursor.remove_current_and_move_back();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method not found in `CursorMut<'_, K, V>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `key` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:463:34
[INFO] [stdout]     |
[INFO] [stdout] 463 |         if let Some(lt) = cursor.key() {
[INFO] [stdout]     |                                  ^^^ method not found in `CursorMut<'_, K, V>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_current` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:465:31
[INFO] [stdout]     |
[INFO] [stdout] 465 |                 return cursor.remove_current();
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^ help: there is a method with a similar name: `remove_next`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `key` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:479:34
[INFO] [stdout]     |
[INFO] [stdout] 479 |         if let Some(le) = cursor.key() {
[INFO] [stdout]     |                                  ^^^ method not found in `CursorMut<'_, K, V>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_current` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:481:31
[INFO] [stdout]     |
[INFO] [stdout] 481 |                 return cursor.remove_current();
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^ help: there is a method with a similar name: `remove_next`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `key` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:495:34
[INFO] [stdout]     |
[INFO] [stdout] 495 |         if let Some(gt) = cursor.key() {
[INFO] [stdout]     |                                  ^^^ method not found in `CursorMut<'_, K, V>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_current` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:497:31
[INFO] [stdout]     |
[INFO] [stdout] 497 |                 return cursor.remove_current();
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^ help: there is a method with a similar name: `remove_next`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `key` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:511:34
[INFO] [stdout]     |
[INFO] [stdout] 511 |         if let Some(ge) = cursor.key() {
[INFO] [stdout]     |                                  ^^^ method not found in `CursorMut<'_, K, V>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_current` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:513:31
[INFO] [stdout]     |
[INFO] [stdout] 513 |                 return cursor.remove_current();
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^ help: there is a method with a similar name: `remove_next`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `key` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:535:37
[INFO] [stdout]     |
[INFO] [stdout] 535 |         while let Some(lt) = cursor.key() {
[INFO] [stdout]     |                                     ^^^ method not found in `CursorMut<'_, K, V>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_current_and_move_back` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:537:24
[INFO] [stdout]     |
[INFO] [stdout] 537 |                 cursor.remove_current_and_move_back();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method not found in `CursorMut<'_, K, V>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `key` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:562:37
[INFO] [stdout]     |
[INFO] [stdout] 562 |         while let Some(gt) = cursor.key() {
[INFO] [stdout]     |                                     ^^^ method not found in `CursorMut<'_, K, V>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_current` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:564:24
[INFO] [stdout]     |
[INFO] [stdout] 564 |                 cursor.remove_current();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^ help: there is a method with a similar name: `remove_next`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `key` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:592:34
[INFO] [stdout]     |
[INFO] [stdout] 592 |         if let Some(le) = cursor.key() {
[INFO] [stdout]     |                                  ^^^ method not found in `CursorMut<'_, K, V>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_current_and_move_back` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:594:24
[INFO] [stdout]     |
[INFO] [stdout] 594 |                 cursor.remove_current_and_move_back();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method not found in `CursorMut<'_, K, V>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `key` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:596:45
[INFO] [stdout]     |
[INFO] [stdout] 596 |                 while let Some(lt) = cursor.key() {
[INFO] [stdout]     |                                             ^^^ method not found in `CursorMut<'_, K, V>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_current_and_move_back` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:598:32
[INFO] [stdout]     |
[INFO] [stdout] 598 |                         cursor.remove_current_and_move_back();
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method not found in `CursorMut<'_, K, V>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `key` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:630:34
[INFO] [stdout]     |
[INFO] [stdout] 630 |         if let Some(ge) = cursor.key() {
[INFO] [stdout]     |                                  ^^^ method not found in `CursorMut<'_, K, V>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_current` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:632:24
[INFO] [stdout]     |
[INFO] [stdout] 632 |                 cursor.remove_current();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^ help: there is a method with a similar name: `remove_next`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `key` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:634:45
[INFO] [stdout]     |
[INFO] [stdout] 634 |                 while let Some(gt) = cursor.key() {
[INFO] [stdout]     |                                             ^^^ method not found in `CursorMut<'_, K, V>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_current` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_map.rs:636:32
[INFO] [stdout]     |
[INFO] [stdout] 636 |                         cursor.remove_current();
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^ help: there is a method with a similar name: `remove_next`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `key` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_set.rs:590:38
[INFO] [stdout]     |
[INFO] [stdout] 590 |             if let Some(ge) = cursor.key() {
[INFO] [stdout]     |                                      ^^^ method not found in `CursorMut<'_, T, ()>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_current` found for struct `superset_map::alloc::collections::btree_map::CursorMut` in the current scope
[INFO] [stdout]    --> src/superset_set.rs:592:28
[INFO] [stdout]     |
[INFO] [stdout] 592 |                     cursor.remove_current().map(|(key, ())| key)
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^ help: there is a method with a similar name: `remove_next`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 31 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `superset_map` (lib) due to 32 previous errors
[INFO] running `Command { std: "docker" "inspect" "2fbab27bef408fb544b2f9a53ca7ed97dd3c5fd3087e1653c79a9ff4bbd605b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fbab27bef408fb544b2f9a53ca7ed97dd3c5fd3087e1653c79a9ff4bbd605b8", kill_on_drop: false }`
[INFO] [stdout] 2fbab27bef408fb544b2f9a53ca7ed97dd3c5fd3087e1653c79a9ff4bbd605b8
