[INFO] cloning repository https://github.com/jonakieling/realms
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jonakieling/realms" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonakieling%2Frealms", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonakieling%2Frealms'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6edfb497db7d4d7909d15f70f0337388534f1e86
[INFO] checking jonakieling/realms against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonakieling%2Frealms" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jonakieling/realms on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jonakieling/realms
[INFO] finished tweaking git repo https://github.com/jonakieling/realms
[INFO] tweaked toml for git repo https://github.com/jonakieling/realms written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/jonakieling/realms already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cfg-if v0.1.5
[INFO] [stderr]   Downloaded serde_derive v1.0.72
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[INFO] [stderr]   Downloaded quote v0.6.8
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[INFO] [stderr]   Downloaded proc-macro2 v0.4.13
[INFO] [stderr]   Downloaded tui v0.2.3
[INFO] [stderr]   Downloaded serde v1.0.72
[INFO] [stderr]   Downloaded itertools v0.7.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 901b2a817bfc2f3da51b809fc9f4f30378f75e2254de8330eb2a8f28b4ee8124
[INFO] running `Command { std: "docker" "start" "-a" "901b2a817bfc2f3da51b809fc9f4f30378f75e2254de8330eb2a8f28b4ee8124", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "901b2a817bfc2f3da51b809fc9f4f30378f75e2254de8330eb2a8f28b4ee8124", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "901b2a817bfc2f3da51b809fc9f4f30378f75e2254de8330eb2a8f28b4ee8124", kill_on_drop: false }`
[INFO] [stdout] 901b2a817bfc2f3da51b809fc9f4f30378f75e2254de8330eb2a8f28b4ee8124
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 25f62bc5969555249ff782ca9ba6092d9c6021e85e43f787771bf60602900322
[INFO] running `Command { std: "docker" "start" "-a" "25f62bc5969555249ff782ca9ba6092d9c6021e85e43f787771bf60602900322", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]    Compiling proc-macro2 v0.4.13
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling serde v1.0.72
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]     Checking cfg-if v0.1.5
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking cassowary v0.3.0
[INFO] [stderr]     Checking log v0.4.4
[INFO] [stderr]     Checking itertools v0.7.8
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking byteorder v1.2.4
[INFO] [stderr]     Checking unicode-segmentation v1.2.1
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking rand v0.4.3
[INFO] [stderr]     Checking termion v1.5.1
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking tui v0.2.3
[INFO] [stderr]     Checking chrono v0.4.5
[INFO] [stderr]    Compiling serde_derive v1.0.72
[INFO] [stderr]     Checking bincode v1.0.1
[INFO] [stderr]     Checking uuid v0.6.5
[INFO] [stderr]     Checking realms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/utility.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::cmp::{max, Ord};
[INFO] [stdout]   |                     ^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/utility.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::cmp::{max, Ord};
[INFO] [stdout]   |                     ^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/server.rs:65:11
[INFO] [stdout]    |
[INFO] [stdout] 65 |             let mut glimpse = Arc::clone(&universe);
[INFO] [stdout]    |                 ----^^^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/server.rs:156:14
[INFO] [stdout]     |
[INFO] [stdout] 156 |             let mut strategy = RealmStrategy::new(id, RealmVariant::Tutorial);
[INFO] [stdout]     |                 ----^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/server.rs:173:15
[INFO] [stdout]     |
[INFO] [stdout] 173 |                 let mut strategy = RealmStrategy::new(id, RealmVariant::Tutorial);
[INFO] [stdout]     |                     ----^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/server.rs:220:16
[INFO] [stdout]     |
[INFO] [stdout] 220 |             if let Some(mut region) = realm_strategies.get_mut(realm_id).region(region_id) {
[INFO] [stdout]     |                         ----^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]   --> src/tokens.rs:87:33
[INFO] [stdout]    |
[INFO] [stdout] 87 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]    |                                 ^^^^^^^ help: try ignoring the field: `variant: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `template`
[INFO] [stdout]   --> src/tokens.rs:87:49
[INFO] [stdout]    |
[INFO] [stdout] 87 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]    |                                                 ^^^^^^^^ help: try ignoring the field: `template: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]   --> src/tokens.rs:96:33
[INFO] [stdout]    |
[INFO] [stdout] 96 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]    |                                 ^^^^^^^ help: try ignoring the field: `variant: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `template`
[INFO] [stdout]   --> src/tokens.rs:96:49
[INFO] [stdout]    |
[INFO] [stdout] 96 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]    |                                                 ^^^^^^^^ help: try ignoring the field: `template: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]    --> src/tokens.rs:117:33
[INFO] [stdout]     |
[INFO] [stdout] 117 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]     |                                 ^^^^^^^ help: try ignoring the field: `variant: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `template`
[INFO] [stdout]    --> src/tokens.rs:117:49
[INFO] [stdout]     |
[INFO] [stdout] 117 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]     |                                                 ^^^^^^^^ help: try ignoring the field: `template: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]    --> src/tokens.rs:134:33
[INFO] [stdout]     |
[INFO] [stdout] 134 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]     |                                 ^^^^^^^ help: try ignoring the field: `variant: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `template`
[INFO] [stdout]    --> src/tokens.rs:134:49
[INFO] [stdout]     |
[INFO] [stdout] 134 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]     |                                                 ^^^^^^^^ help: try ignoring the field: `template: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/server.rs:65:11
[INFO] [stdout]    |
[INFO] [stdout] 65 |             let mut glimpse = Arc::clone(&universe);
[INFO] [stdout]    |                 ----^^^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/server.rs:156:14
[INFO] [stdout]     |
[INFO] [stdout] 156 |             let mut strategy = RealmStrategy::new(id, RealmVariant::Tutorial);
[INFO] [stdout]     |                 ----^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/server.rs:173:15
[INFO] [stdout]     |
[INFO] [stdout] 173 |                 let mut strategy = RealmStrategy::new(id, RealmVariant::Tutorial);
[INFO] [stdout]     |                     ----^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/server.rs:220:16
[INFO] [stdout]     |
[INFO] [stdout] 220 |             if let Some(mut region) = realm_strategies.get_mut(realm_id).region(region_id) {
[INFO] [stdout]     |                         ----^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/realms/tutorial.rs:253:18
[INFO] [stdout]     |
[INFO] [stdout] 253 |         for ((_, mut region), hex) in regions.iter_mut().zip(hexes.iter()) {
[INFO] [stdout]     |                  ----^^^^^^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]   --> src/tokens.rs:87:33
[INFO] [stdout]    |
[INFO] [stdout] 87 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]    |                                 ^^^^^^^ help: try ignoring the field: `variant: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `template`
[INFO] [stdout]   --> src/tokens.rs:87:49
[INFO] [stdout]    |
[INFO] [stdout] 87 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]    |                                                 ^^^^^^^^ help: try ignoring the field: `template: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]   --> src/tokens.rs:96:33
[INFO] [stdout]    |
[INFO] [stdout] 96 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]    |                                 ^^^^^^^ help: try ignoring the field: `variant: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `template`
[INFO] [stdout]   --> src/tokens.rs:96:49
[INFO] [stdout]    |
[INFO] [stdout] 96 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]    |                                                 ^^^^^^^^ help: try ignoring the field: `template: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]    --> src/tokens.rs:117:33
[INFO] [stdout]     |
[INFO] [stdout] 117 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]     |                                 ^^^^^^^ help: try ignoring the field: `variant: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `template`
[INFO] [stdout]    --> src/tokens.rs:117:49
[INFO] [stdout]     |
[INFO] [stdout] 117 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]     |                                                 ^^^^^^^^ help: try ignoring the field: `template: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]    --> src/tokens.rs:134:33
[INFO] [stdout]     |
[INFO] [stdout] 134 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]     |                                 ^^^^^^^ help: try ignoring the field: `variant: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `template`
[INFO] [stdout]    --> src/tokens.rs:134:49
[INFO] [stdout]     |
[INFO] [stdout] 134 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]     |                                                 ^^^^^^^^ help: try ignoring the field: `template: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `extract_current`, `iter_mut`, and `clear` are never used
[INFO] [stdout]    --> src/utility.rs:72:12
[INFO] [stdout]     |
[INFO] [stdout] 14  | impl<T: Clone> SelectionStorage<T> {
[INFO] [stdout]     | ---------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 72  |     pub fn extract_current(&mut self) -> Option<T> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 108 |     pub fn iter_mut(&mut self) -> slice::IterMut<T> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 120 |     pub fn clear(&mut self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `last` and `clear` are never used
[INFO] [stdout]    --> src/utility.rs:171:12
[INFO] [stdout]     |
[INFO] [stdout] 131 | impl<T: Clone + Ord> SelectionHashMap<T> {
[INFO] [stdout]     | ---------------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 171 |     pub fn last(&mut self) -> Option<&T> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 211 |     pub fn clear(&mut self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021
[INFO] [stdout]   --> src/server_dashboard.rs:56:44
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 ["cId", "request", "time"].into_iter(),
[INFO] [stdout]    |                                            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 ["cId", "request", "time"].iter(),
[INFO] [stdout]    |                                            ~~~~
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 IntoIterator::into_iter(["cId", "request", "time"]),
[INFO] [stdout]    |                 ++++++++++++++++++++++++                          ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021
[INFO] [stdout]   --> src/server_dashboard.rs:78:51
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 ["cId", "uuid", "realms", "time"].into_iter(),
[INFO] [stdout]    |                                                   ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 ["cId", "uuid", "realms", "time"].iter(),
[INFO] [stdout]    |                                                   ~~~~
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 IntoIterator::into_iter(["cId", "uuid", "realms", "time"]),
[INFO] [stdout]    |                 ++++++++++++++++++++++++                                 ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021
[INFO] [stdout]    --> src/server_dashboard.rs:105:41
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 ["rId", "age", "title"].into_iter(),
[INFO] [stdout]     |                                         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 ["rId", "age", "title"].iter(),
[INFO] [stdout]     |                                         ~~~~
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 IntoIterator::into_iter(["rId", "age", "title"]),
[INFO] [stdout]     |                 ++++++++++++++++++++++++                       ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/realms/tutorial.rs:253:18
[INFO] [stdout]     |
[INFO] [stdout] 253 |         for ((_, mut region), hex) in regions.iter_mut().zip(hexes.iter()) {
[INFO] [stdout]     |                  ----^^^^^^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `extract_current`, `iter_mut`, and `clear` are never used
[INFO] [stdout]    --> src/utility.rs:72:12
[INFO] [stdout]     |
[INFO] [stdout] 14  | impl<T: Clone> SelectionStorage<T> {
[INFO] [stdout]     | ---------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 72  |     pub fn extract_current(&mut self) -> Option<T> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 108 |     pub fn iter_mut(&mut self) -> slice::IterMut<T> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 120 |     pub fn clear(&mut self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `last` and `clear` are never used
[INFO] [stdout]    --> src/utility.rs:171:12
[INFO] [stdout]     |
[INFO] [stdout] 131 | impl<T: Clone + Ord> SelectionHashMap<T> {
[INFO] [stdout]     | ---------------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 171 |     pub fn last(&mut self) -> Option<&T> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 211 |     pub fn clear(&mut self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021
[INFO] [stdout]   --> src/server_dashboard.rs:56:44
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 ["cId", "request", "time"].into_iter(),
[INFO] [stdout]    |                                            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 ["cId", "request", "time"].iter(),
[INFO] [stdout]    |                                            ~~~~
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 IntoIterator::into_iter(["cId", "request", "time"]),
[INFO] [stdout]    |                 ++++++++++++++++++++++++                          ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021
[INFO] [stdout]   --> src/server_dashboard.rs:78:51
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 ["cId", "uuid", "realms", "time"].into_iter(),
[INFO] [stdout]    |                                                   ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 ["cId", "uuid", "realms", "time"].iter(),
[INFO] [stdout]    |                                                   ~~~~
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 IntoIterator::into_iter(["cId", "uuid", "realms", "time"]),
[INFO] [stdout]    |                 ++++++++++++++++++++++++                                 ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021
[INFO] [stdout]    --> src/server_dashboard.rs:105:41
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 ["rId", "age", "title"].into_iter(),
[INFO] [stdout]     |                                         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 ["rId", "age", "title"].iter(),
[INFO] [stdout]     |                                         ~~~~
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 IntoIterator::into_iter(["rId", "age", "title"]),
[INFO] [stdout]     |                 ++++++++++++++++++++++++                       ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.76s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.14.9
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "25f62bc5969555249ff782ca9ba6092d9c6021e85e43f787771bf60602900322", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25f62bc5969555249ff782ca9ba6092d9c6021e85e43f787771bf60602900322", kill_on_drop: false }`
[INFO] [stdout] 25f62bc5969555249ff782ca9ba6092d9c6021e85e43f787771bf60602900322
[INFO] checking jonakieling/realms against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonakieling%2Frealms" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jonakieling/realms on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jonakieling/realms
[INFO] finished tweaking git repo https://github.com/jonakieling/realms
[INFO] tweaked toml for git repo https://github.com/jonakieling/realms written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/jonakieling/realms already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e7ed12635bfa5c52dffb55d04ef8339e3c67417f3d47fb409f0f47d4ab0d54b5
[INFO] running `Command { std: "docker" "start" "-a" "e7ed12635bfa5c52dffb55d04ef8339e3c67417f3d47fb409f0f47d4ab0d54b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e7ed12635bfa5c52dffb55d04ef8339e3c67417f3d47fb409f0f47d4ab0d54b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7ed12635bfa5c52dffb55d04ef8339e3c67417f3d47fb409f0f47d4ab0d54b5", kill_on_drop: false }`
[INFO] [stdout] e7ed12635bfa5c52dffb55d04ef8339e3c67417f3d47fb409f0f47d4ab0d54b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 867424d0b506b2b98e407d4c06381b9c7d9e8af2003345bcd6587f519ac45b02
[INFO] running `Command { std: "docker" "start" "-a" "867424d0b506b2b98e407d4c06381b9c7d9e8af2003345bcd6587f519ac45b02", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]    Compiling proc-macro2 v0.4.13
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling serde v1.0.72
[INFO] [stderr]     Checking cfg-if v0.1.5
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking log v0.4.4
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking itertools v0.7.8
[INFO] [stderr]     Checking cassowary v0.3.0
[INFO] [stderr]     Checking byteorder v1.2.4
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking unicode-segmentation v1.2.1
[INFO] [stderr]     Checking termion v1.5.1
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking rand v0.4.3
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]     Checking tui v0.2.3
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking chrono v0.4.5
[INFO] [stderr]    Compiling serde_derive v1.0.72
[INFO] [stderr]     Checking bincode v1.0.1
[INFO] [stderr]     Checking uuid v0.6.5
[INFO] [stderr]     Checking realms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/utility.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::cmp::{max, Ord};
[INFO] [stdout]   |                     ^^^
[INFO] [stdout]  --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/utility.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::cmp::{max, Ord};
[INFO] [stdout]   |                     ^^^
[INFO] [stdout]  --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/server.rs:65:11
[INFO] [stdout]    |
[INFO] [stdout] 65 |             let mut glimpse = Arc::clone(&universe);
[INFO] [stdout]    |                 ----^^^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/server.rs:156:14
[INFO] [stdout]     |
[INFO] [stdout] 156 |             let mut strategy = RealmStrategy::new(id, RealmVariant::Tutorial);
[INFO] [stdout]     |                 ----^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/server.rs:173:15
[INFO] [stdout]     |
[INFO] [stdout] 173 |                 let mut strategy = RealmStrategy::new(id, RealmVariant::Tutorial);
[INFO] [stdout]     |                     ----^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/server.rs:220:16
[INFO] [stdout]     |
[INFO] [stdout] 220 |             if let Some(mut region) = realm_strategies.get_mut(realm_id).region(region_id) {
[INFO] [stdout]     |                         ----^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]   --> src/tokens.rs:87:33
[INFO] [stdout]    |
[INFO] [stdout] 87 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]    |                                 ^^^^^^^ help: try ignoring the field: `variant: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `template`
[INFO] [stdout]   --> src/tokens.rs:87:49
[INFO] [stdout]    |
[INFO] [stdout] 87 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]    |                                                 ^^^^^^^^ help: try ignoring the field: `template: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]   --> src/tokens.rs:96:33
[INFO] [stdout]    |
[INFO] [stdout] 96 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]    |                                 ^^^^^^^ help: try ignoring the field: `variant: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `template`
[INFO] [stdout]   --> src/tokens.rs:96:49
[INFO] [stdout]    |
[INFO] [stdout] 96 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]    |                                                 ^^^^^^^^ help: try ignoring the field: `template: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]    --> src/tokens.rs:117:33
[INFO] [stdout]     |
[INFO] [stdout] 117 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]     |                                 ^^^^^^^ help: try ignoring the field: `variant: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `template`
[INFO] [stdout]    --> src/tokens.rs:117:49
[INFO] [stdout]     |
[INFO] [stdout] 117 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]     |                                                 ^^^^^^^^ help: try ignoring the field: `template: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]    --> src/tokens.rs:134:33
[INFO] [stdout]     |
[INFO] [stdout] 134 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]     |                                 ^^^^^^^ help: try ignoring the field: `variant: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `template`
[INFO] [stdout]    --> src/tokens.rs:134:49
[INFO] [stdout]     |
[INFO] [stdout] 134 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]     |                                                 ^^^^^^^^ help: try ignoring the field: `template: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/server.rs:65:11
[INFO] [stdout]    |
[INFO] [stdout] 65 |             let mut glimpse = Arc::clone(&universe);
[INFO] [stdout]    |                 ----^^^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/server.rs:156:14
[INFO] [stdout]     |
[INFO] [stdout] 156 |             let mut strategy = RealmStrategy::new(id, RealmVariant::Tutorial);
[INFO] [stdout]     |                 ----^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/server.rs:173:15
[INFO] [stdout]     |
[INFO] [stdout] 173 |                 let mut strategy = RealmStrategy::new(id, RealmVariant::Tutorial);
[INFO] [stdout]     |                     ----^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/server.rs:220:16
[INFO] [stdout]     |
[INFO] [stdout] 220 |             if let Some(mut region) = realm_strategies.get_mut(realm_id).region(region_id) {
[INFO] [stdout]     |                         ----^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/realms/tutorial.rs:253:18
[INFO] [stdout]     |
[INFO] [stdout] 253 |         for ((_, mut region), hex) in regions.iter_mut().zip(hexes.iter()) {
[INFO] [stdout]     |                  ----^^^^^^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]   --> src/tokens.rs:87:33
[INFO] [stdout]    |
[INFO] [stdout] 87 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]    |                                 ^^^^^^^ help: try ignoring the field: `variant: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `template`
[INFO] [stdout]   --> src/tokens.rs:87:49
[INFO] [stdout]    |
[INFO] [stdout] 87 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]    |                                                 ^^^^^^^^ help: try ignoring the field: `template: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]   --> src/tokens.rs:96:33
[INFO] [stdout]    |
[INFO] [stdout] 96 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]    |                                 ^^^^^^^ help: try ignoring the field: `variant: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `template`
[INFO] [stdout]   --> src/tokens.rs:96:49
[INFO] [stdout]    |
[INFO] [stdout] 96 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]    |                                                 ^^^^^^^^ help: try ignoring the field: `template: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]    --> src/tokens.rs:117:33
[INFO] [stdout]     |
[INFO] [stdout] 117 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]     |                                 ^^^^^^^ help: try ignoring the field: `variant: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `template`
[INFO] [stdout]    --> src/tokens.rs:117:49
[INFO] [stdout]     |
[INFO] [stdout] 117 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]     |                                                 ^^^^^^^^ help: try ignoring the field: `template: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant`
[INFO] [stdout]    --> src/tokens.rs:134:33
[INFO] [stdout]     |
[INFO] [stdout] 134 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]     |                                 ^^^^^^^ help: try ignoring the field: `variant: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `template`
[INFO] [stdout]    --> src/tokens.rs:134:49
[INFO] [stdout]     |
[INFO] [stdout] 134 |             Some(RealmStrategy {variant, realm, template}) => {
[INFO] [stdout]     |                                                 ^^^^^^^^ help: try ignoring the field: `template: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `extract_current`, `iter_mut`, and `clear` are never used
[INFO] [stdout]    --> src/utility.rs:72:12
[INFO] [stdout]     |
[INFO] [stdout] 14  | impl<T: Clone> SelectionStorage<T> {
[INFO] [stdout]     | ---------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 72  |     pub fn extract_current(&mut self) -> Option<T> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 108 |     pub fn iter_mut(&mut self) -> slice::IterMut<T> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 120 |     pub fn clear(&mut self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `last` and `clear` are never used
[INFO] [stdout]    --> src/utility.rs:171:12
[INFO] [stdout]     |
[INFO] [stdout] 131 | impl<T: Clone + Ord> SelectionHashMap<T> {
[INFO] [stdout]     | ---------------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 171 |     pub fn last(&mut self) -> Option<&T> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 211 |     pub fn clear(&mut self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021
[INFO] [stdout]   --> src/server_dashboard.rs:56:44
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 ["cId", "request", "time"].into_iter(),
[INFO] [stdout]    |                                            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 ["cId", "request", "time"].iter(),
[INFO] [stdout]    |                                            ~~~~
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 IntoIterator::into_iter(["cId", "request", "time"]),
[INFO] [stdout]    |                 ++++++++++++++++++++++++                          ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021
[INFO] [stdout]   --> src/server_dashboard.rs:78:51
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 ["cId", "uuid", "realms", "time"].into_iter(),
[INFO] [stdout]    |                                                   ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 ["cId", "uuid", "realms", "time"].iter(),
[INFO] [stdout]    |                                                   ~~~~
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 IntoIterator::into_iter(["cId", "uuid", "realms", "time"]),
[INFO] [stdout]    |                 ++++++++++++++++++++++++                                 ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021
[INFO] [stdout]    --> src/server_dashboard.rs:105:41
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 ["rId", "age", "title"].into_iter(),
[INFO] [stdout]     |                                         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 ["rId", "age", "title"].iter(),
[INFO] [stdout]     |                                         ~~~~
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 IntoIterator::into_iter(["rId", "age", "title"]),
[INFO] [stdout]     |                 ++++++++++++++++++++++++                       ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/realms/tutorial.rs:253:18
[INFO] [stdout]     |
[INFO] [stdout] 253 |         for ((_, mut region), hex) in regions.iter_mut().zip(hexes.iter()) {
[INFO] [stdout]     |                  ----^^^^^^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `extract_current`, `iter_mut`, and `clear` are never used
[INFO] [stdout]    --> src/utility.rs:72:12
[INFO] [stdout]     |
[INFO] [stdout] 14  | impl<T: Clone> SelectionStorage<T> {
[INFO] [stdout]     | ---------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 72  |     pub fn extract_current(&mut self) -> Option<T> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 108 |     pub fn iter_mut(&mut self) -> slice::IterMut<T> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 120 |     pub fn clear(&mut self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `last` and `clear` are never used
[INFO] [stdout]    --> src/utility.rs:171:12
[INFO] [stdout]     |
[INFO] [stdout] 131 | impl<T: Clone + Ord> SelectionHashMap<T> {
[INFO] [stdout]     | ---------------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 171 |     pub fn last(&mut self) -> Option<&T> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 211 |     pub fn clear(&mut self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021
[INFO] [stdout]   --> src/server_dashboard.rs:56:44
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 ["cId", "request", "time"].into_iter(),
[INFO] [stdout]    |                                            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 ["cId", "request", "time"].iter(),
[INFO] [stdout]    |                                            ~~~~
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 IntoIterator::into_iter(["cId", "request", "time"]),
[INFO] [stdout]    |                 ++++++++++++++++++++++++                          ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021
[INFO] [stdout]   --> src/server_dashboard.rs:78:51
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 ["cId", "uuid", "realms", "time"].into_iter(),
[INFO] [stdout]    |                                                   ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 ["cId", "uuid", "realms", "time"].iter(),
[INFO] [stdout]    |                                                   ~~~~
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 78 |                 IntoIterator::into_iter(["cId", "uuid", "realms", "time"]),
[INFO] [stdout]    |                 ++++++++++++++++++++++++                                 ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021
[INFO] [stdout]    --> src/server_dashboard.rs:105:41
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 ["rId", "age", "title"].into_iter(),
[INFO] [stdout]     |                                         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 ["rId", "age", "title"].iter(),
[INFO] [stdout]     |                                         ~~~~
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 IntoIterator::into_iter(["rId", "age", "title"]),
[INFO] [stdout]     |                 ++++++++++++++++++++++++                       ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.14s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.14.9
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "867424d0b506b2b98e407d4c06381b9c7d9e8af2003345bcd6587f519ac45b02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "867424d0b506b2b98e407d4c06381b9c7d9e8af2003345bcd6587f519ac45b02", kill_on_drop: false }`
[INFO] [stdout] 867424d0b506b2b98e407d4c06381b9c7d9e8af2003345bcd6587f519ac45b02