[INFO] fetching crate stitches 0.1.0...
[INFO] checking stitches-0.1.0 against beta for pr-78714
[INFO] extracting crate stitches 0.1.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate stitches 0.1.0 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 crates.io crate stitches 0.1.0
[INFO] finished tweaking crates.io crate stitches 0.1.0
[INFO] tweaked toml for crates.io crate stitches 0.1.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] d6c16902936132c1b8b3a8f9752a379cb95e9300b80bd7cde08c02a32576bd63
[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" "d6c16902936132c1b8b3a8f9752a379cb95e9300b80bd7cde08c02a32576bd63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d6c16902936132c1b8b3a8f9752a379cb95e9300b80bd7cde08c02a32576bd63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6c16902936132c1b8b3a8f9752a379cb95e9300b80bd7cde08c02a32576bd63", kill_on_drop: false }`
[INFO] [stdout] d6c16902936132c1b8b3a8f9752a379cb95e9300b80bd7cde08c02a32576bd63
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 5b35d289ed6638287543a0ada393e6592346ef901bb5d403793595537b04e065
[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" "5b35d289ed6638287543a0ada393e6592346ef901bb5d403793595537b04e065", kill_on_drop: false }`
[INFO] [stderr]     Checking stitches v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/tree_search.rs:7:30
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn initial(&self) -> Box<Iterator<Item = Self::Candidate>>;
[INFO] [stdout]   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = Self::Candidate>`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/tree_search.rs:9:67
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn following<'s>(&'s self, candidate: Self::Candidate) -> Box<Iterator<Item = Self::Candidate> + 's>;
[INFO] [stdout]   |                                                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = Self::Candidate> + 's`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/tree_search.rs:7:30
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn initial(&self) -> Box<Iterator<Item = Self::Candidate>>;
[INFO] [stdout]   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = Self::Candidate>`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/tree_search.rs:9:67
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn following<'s>(&'s self, candidate: Self::Candidate) -> Box<Iterator<Item = Self::Candidate> + 's>;
[INFO] [stdout]   |                                                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = Self::Candidate> + 's`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `outer_len`
[INFO] [stdout]   --> src/fast_deque.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn outer_len(&self) -> usize {
[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: `len`
[INFO] [stdout]   --> src/fast_deque.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]   --> src/fast_deque.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub fn get(&self, mut index: usize) -> Option<&T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_head`
[INFO] [stdout]   --> src/fast_deque.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub fn peek_head(&self) -> Option<&T> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `iter`
[INFO] [stdout]   --> src/fast_deque.rs:67:12
[INFO] [stdout]    |
[INFO] [stdout] 67 |     pub fn iter(&self) -> impl Iterator<Item = &T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `outer_len`
[INFO] [stdout]   --> src/fast_deque.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn outer_len(&self) -> usize {
[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: `len`
[INFO] [stdout]   --> src/fast_deque.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]   --> src/fast_deque.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub fn get(&self, mut index: usize) -> Option<&T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_head`
[INFO] [stdout]   --> src/fast_deque.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub fn peek_head(&self) -> Option<&T> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `iter`
[INFO] [stdout]   --> src/fast_deque.rs:67:12
[INFO] [stdout]    |
[INFO] [stdout] 67 |     pub fn iter(&self) -> impl Iterator<Item = &T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "5b35d289ed6638287543a0ada393e6592346ef901bb5d403793595537b04e065", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b35d289ed6638287543a0ada393e6592346ef901bb5d403793595537b04e065", kill_on_drop: false }`
[INFO] [stdout] 5b35d289ed6638287543a0ada393e6592346ef901bb5d403793595537b04e065