[INFO] cloning repository https://github.com/caphindsight/vdneg
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/caphindsight/vdneg" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaphindsight%2Fvdneg", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaphindsight%2Fvdneg'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f71e01df48c81d0b5b5e160eca0c6f8b52899418
[INFO] checking caphindsight/vdneg against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaphindsight%2Fvdneg" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/caphindsight/vdneg on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/caphindsight/vdneg
[INFO] finished tweaking git repo https://github.com/caphindsight/vdneg
[INFO] tweaked toml for git repo https://github.com/caphindsight/vdneg written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/caphindsight/vdneg already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] be366d11a1b3dba6340c4379377d729cca16aa85e65b062ca217f78e1bf915cb
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "be366d11a1b3dba6340c4379377d729cca16aa85e65b062ca217f78e1bf915cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be366d11a1b3dba6340c4379377d729cca16aa85e65b062ca217f78e1bf915cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be366d11a1b3dba6340c4379377d729cca16aa85e65b062ca217f78e1bf915cb", kill_on_drop: false }`
[INFO] [stdout] be366d11a1b3dba6340c4379377d729cca16aa85e65b062ca217f78e1bf915cb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7755d1caf0de0beedc7c10eb708323f0c9bae413ab794e4092994f35cb59d8bc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7755d1caf0de0beedc7c10eb708323f0c9bae413ab794e4092994f35cb59d8bc", 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]     Checking vdneg v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `cards::Rank`
[INFO] [stdout]  --> src/combo.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use cards::Rank;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `cards::Suit`
[INFO] [stdout]  --> src/combo.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use cards::Suit;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `cards::Rank`
[INFO] [stdout]  --> src/combo.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use cards::Rank;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `cards::Suit`
[INFO] [stdout]  --> src/combo.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use cards::Suit;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_string`
[INFO] [stdout]   --> src/cards.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn to_string(self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_unicode_string`
[INFO] [stdout]   --> src/cards.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn to_unicode_string(self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_ascii_string`
[INFO] [stdout]   --> src/cards.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn to_ascii_string(self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_long_unicode_string`
[INFO] [stdout]    --> src/cards.rs:144:12
[INFO] [stdout]     |
[INFO] [stdout] 144 |     pub fn to_long_unicode_string(self) -> String {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_long_ascii_string`
[INFO] [stdout]    --> src/cards.rs:150:12
[INFO] [stdout]     |
[INFO] [stdout] 150 |     pub fn to_long_ascii_string(self) -> String {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deck_unshuffled`
[INFO] [stdout]    --> src/cards.rs:223:8
[INFO] [stdout]     |
[INFO] [stdout] 223 | pub fn deck_unshuffled() -> Vec<Card> { vec![
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deck_shuffled`
[INFO] [stdout]    --> src/cards.rs:281:8
[INFO] [stdout]     |
[INFO] [stdout] 281 | pub fn deck_shuffled() -> Vec<Card> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Straight`
[INFO] [stdout]   --> src/combo.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Straight,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Flush`
[INFO] [stdout]   --> src/combo.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Flush,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `FullHouse`
[INFO] [stdout]   --> src/combo.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     FullHouse,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `FourOfKind`
[INFO] [stdout]   --> src/combo.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     FourOfKind,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `StraightFlush`
[INFO] [stdout]   --> src/combo.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     StraightFlush,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RoyalFlush`
[INFO] [stdout]   --> src/combo.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     RoyalFlush,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_long_unicode_string`
[INFO] [stdout]   --> src/combo.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn to_long_unicode_string(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_long_ascii_string`
[INFO] [stdout]   --> src/combo.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub fn to_long_ascii_string(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `filter_by_suit`
[INFO] [stdout]    --> src/combo.rs:188:8
[INFO] [stdout]     |
[INFO] [stdout] 188 |     fn filter_by_suit(cards: &[Card], suit: Suit) -> Vec<Card> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_string`
[INFO] [stdout]   --> src/cards.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn to_string(self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_unicode_string`
[INFO] [stdout]   --> src/cards.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn to_unicode_string(self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_ascii_string`
[INFO] [stdout]   --> src/cards.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn to_ascii_string(self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_long_unicode_string`
[INFO] [stdout]    --> src/cards.rs:144:12
[INFO] [stdout]     |
[INFO] [stdout] 144 |     pub fn to_long_unicode_string(self) -> String {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_long_ascii_string`
[INFO] [stdout]    --> src/cards.rs:150:12
[INFO] [stdout]     |
[INFO] [stdout] 150 |     pub fn to_long_ascii_string(self) -> String {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deck_unshuffled`
[INFO] [stdout]    --> src/cards.rs:223:8
[INFO] [stdout]     |
[INFO] [stdout] 223 | pub fn deck_unshuffled() -> Vec<Card> { vec![
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deck_shuffled`
[INFO] [stdout]    --> src/cards.rs:281:8
[INFO] [stdout]     |
[INFO] [stdout] 281 | pub fn deck_shuffled() -> Vec<Card> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Straight`
[INFO] [stdout]   --> src/combo.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Straight,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Flush`
[INFO] [stdout]   --> src/combo.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Flush,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `FullHouse`
[INFO] [stdout]   --> src/combo.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     FullHouse,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `FourOfKind`
[INFO] [stdout]   --> src/combo.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     FourOfKind,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `StraightFlush`
[INFO] [stdout]   --> src/combo.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     StraightFlush,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RoyalFlush`
[INFO] [stdout]   --> src/combo.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     RoyalFlush,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_long_unicode_string`
[INFO] [stdout]   --> src/combo.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn to_long_unicode_string(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_long_ascii_string`
[INFO] [stdout]   --> src/combo.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub fn to_long_ascii_string(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `filter_by_suit`
[INFO] [stdout]    --> src/combo.rs:188:8
[INFO] [stdout]     |
[INFO] [stdout] 188 |     fn filter_by_suit(cards: &[Card], suit: Suit) -> Vec<Card> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.53s
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7755d1caf0de0beedc7c10eb708323f0c9bae413ab794e4092994f35cb59d8bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7755d1caf0de0beedc7c10eb708323f0c9bae413ab794e4092994f35cb59d8bc", kill_on_drop: false }`
[INFO] [stdout] 7755d1caf0de0beedc7c10eb708323f0c9bae413ab794e4092994f35cb59d8bc