[INFO] cloning repository https://github.com/SpiderUnderUrBed/flashcard-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SpiderUnderUrBed/flashcard-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpiderUnderUrBed%2Fflashcard-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpiderUnderUrBed%2Fflashcard-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8b81e8fbd93683bee42b71b281390da0f248fbcb
[INFO] checking SpiderUnderUrBed/flashcard-rs against master#2aaa62b89d22b570e560731b03e3d2d6f5c3bbce for pr-139751-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpiderUnderUrBed%2Fflashcard-rs" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/SpiderUnderUrBed/flashcard-rs
[INFO] finished tweaking git repo https://github.com/SpiderUnderUrBed/flashcard-rs
[INFO] tweaked toml for git repo https://github.com/SpiderUnderUrBed/flashcard-rs written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/SpiderUnderUrBed/flashcard-rs on toolchain 2aaa62b89d22b570e560731b03e3d2d6f5c3bbce
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2aaa62b89d22b570e560731b03e3d2d6f5c3bbce" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/SpiderUnderUrBed/flashcard-rs 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" "+2aaa62b89d22b570e560731b03e3d2d6f5c3bbce" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2aaa62b89d22b570e560731b03e3d2d6f5c3bbce" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0e7286452927296eddc322d4d168b8a9b10a972b63a64b303eed979cc7725b69
[INFO] running `Command { std: "docker" "start" "-a" "0e7286452927296eddc322d4d168b8a9b10a972b63a64b303eed979cc7725b69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e7286452927296eddc322d4d168b8a9b10a972b63a64b303eed979cc7725b69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e7286452927296eddc322d4d168b8a9b10a972b63a64b303eed979cc7725b69", kill_on_drop: false }`
[INFO] [stdout] 0e7286452927296eddc322d4d168b8a9b10a972b63a64b303eed979cc7725b69
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2aaa62b89d22b570e560731b03e3d2d6f5c3bbce" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 192bdf9fc909298617dad8862bd68a5abb19274d32b26469e550ad745394fdbb
[INFO] running `Command { std: "docker" "start" "-a" "192bdf9fc909298617dad8862bd68a5abb19274d32b26469e550ad745394fdbb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
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[INFO] [stdout] warning: unused import: `FlashcardKey`
[INFO] [stdout]   --> src/main.rs:17:23
[INFO] [stdout]    |
[INFO] [stdout] 17 | use quiz::{Flashcard, FlashcardKey, Quiz, Topic, TopicKey, TopicTag, Study};
[INFO] [stdout]    |                       ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `slotmap::new_key_type`
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use slotmap::new_key_type;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `advanced::graphics::futures::backend::default`
[INFO] [stdout]  --> src/quiz.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | use iced::{advanced::graphics::futures::backend::default, Background};
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FlashcardKey`
[INFO] [stdout]   --> src/main.rs:17:23
[INFO] [stdout]    |
[INFO] [stdout] 17 | use quiz::{Flashcard, FlashcardKey, Quiz, Topic, TopicKey, TopicTag, Study};
[INFO] [stdout]    |                       ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `slotmap::new_key_type`
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use slotmap::new_key_type;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `advanced::graphics::futures::backend::default`
[INFO] [stdout]  --> src/quiz.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | use iced::{advanced::graphics::futures::backend::default, Background};
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_qna`
[INFO] [stdout]    --> src/quiz.rs:165:21
[INFO] [stdout]     |
[INFO] [stdout] 165 |                 let new_qna = Question {
[INFO] [stdout]     |                     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_qna`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/quiz.rs:270:13
[INFO] [stdout]     |
[INFO] [stdout] 270 |         let mut quiz_topic = Topic {
[INFO] [stdout]     |             ----^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `flashcard_key`
[INFO] [stdout]    --> src/quiz.rs:294:13
[INFO] [stdout]     |
[INFO] [stdout] 294 |         let flashcard_key = study.cards.insert(flashcard);
[INFO] [stdout]     |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_flashcard_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/main.rs:167:13
[INFO] [stdout]     |
[INFO] [stdout] 167 |             _ => {}
[INFO] [stdout]     |             ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/main.rs:167:13
[INFO] [stdout]     |
[INFO] [stdout]  99 |             Message::StartQuiz => {
[INFO] [stdout]     |             ------------------ matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 104 |             Message::SelectTopic(topic_key) => {
[INFO] [stdout]     |             ------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 108 |             Message::SelectQuiz(topic_key) => {
[INFO] [stdout]     |             ------------------------------ matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 112 |             Message::SubmitCard(card) => {
[INFO] [stdout]     |             ------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 167 |             _ => {}
[INFO] [stdout]     |             ^ ...and 18 other patterns collectively make this unreachable
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `current_topics` is never read
[INFO] [stdout]   --> src/quiz.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub struct Study {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub current_topics: Vec<TopicKey>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Study` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `change_namespace` and `operation_for_namespace` are never used
[INFO] [stdout]    --> src/quiz.rs:244:12
[INFO] [stdout]     |
[INFO] [stdout]  72 | impl Quiz {
[INFO] [stdout]     | --------- associated functions in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 244 |     pub fn change_namespace(){
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 247 |     pub fn operation_for_namespace(){
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `App` is never constructed
[INFO] [stdout]    --> src/quiz.rs:257:12
[INFO] [stdout]     |
[INFO] [stdout] 257 |     struct App {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/main.rs:171:13
[INFO] [stdout]     |
[INFO] [stdout] 171 |     fn view(&self) -> Container<Message> {
[INFO] [stdout]     |             ^^^^^     ^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |             |
[INFO] [stdout]     |             the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 171 |     fn view(&self) -> Container<'_, Message> {
[INFO] [stdout]     |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_qna`
[INFO] [stdout]    --> src/quiz.rs:165:21
[INFO] [stdout]     |
[INFO] [stdout] 165 |                 let new_qna = Question {
[INFO] [stdout]     |                     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_qna`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/main.rs:167:13
[INFO] [stdout]     |
[INFO] [stdout] 167 |             _ => {}
[INFO] [stdout]     |             ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/main.rs:167:13
[INFO] [stdout]     |
[INFO] [stdout]  99 |             Message::StartQuiz => {
[INFO] [stdout]     |             ------------------ matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 104 |             Message::SelectTopic(topic_key) => {
[INFO] [stdout]     |             ------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 108 |             Message::SelectQuiz(topic_key) => {
[INFO] [stdout]     |             ------------------------------ matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 112 |             Message::SubmitCard(card) => {
[INFO] [stdout]     |             ------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 167 |             _ => {}
[INFO] [stdout]     |             ^ ...and 18 other patterns collectively make this unreachable
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `current_topics` is never read
[INFO] [stdout]   --> src/quiz.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub struct Study {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub current_topics: Vec<TopicKey>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Study` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `answer_current`, `change_namespace`, and `operation_for_namespace` are never used
[INFO] [stdout]    --> src/quiz.rs:196:12
[INFO] [stdout]     |
[INFO] [stdout]  72 | impl Quiz {
[INFO] [stdout]     | --------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 196 |     pub fn answer_current(&mut self, user_answer: String) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 244 |     pub fn change_namespace(){
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 247 |     pub fn operation_for_namespace(){
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/main.rs:171:13
[INFO] [stdout]     |
[INFO] [stdout] 171 |     fn view(&self) -> Container<Message> {
[INFO] [stdout]     |             ^^^^^     ^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |             |
[INFO] [stdout]     |             the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 171 |     fn view(&self) -> Container<'_, Message> {
[INFO] [stdout]     |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3m 26s
[INFO] running `Command { std: "docker" "inspect" "192bdf9fc909298617dad8862bd68a5abb19274d32b26469e550ad745394fdbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "192bdf9fc909298617dad8862bd68a5abb19274d32b26469e550ad745394fdbb", kill_on_drop: false }`
[INFO] [stdout] 192bdf9fc909298617dad8862bd68a5abb19274d32b26469e550ad745394fdbb
