[INFO] fetching crate backroll 0.2.0...
[INFO] checking backroll-0.2.0 against try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477
[INFO] extracting crate backroll 0.2.0 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate backroll 0.2.0 on toolchain 3d9fdbff4f377de96b3a51174e7a64086bee9a5c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate backroll 0.2.0
[INFO] finished tweaking crates.io crate backroll 0.2.0
[INFO] tweaked toml for crates.io crate backroll 0.2.0 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "fetch" "--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-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b346c5e22425d5aa19e1cc7eb728507e5b208c9520eb7816d51282c7221867b8
[INFO] running `Command { std: "docker" "start" "-a" "b346c5e22425d5aa19e1cc7eb728507e5b208c9520eb7816d51282c7221867b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b346c5e22425d5aa19e1cc7eb728507e5b208c9520eb7816d51282c7221867b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b346c5e22425d5aa19e1cc7eb728507e5b208c9520eb7816d51282c7221867b8", kill_on_drop: false }`
[INFO] [stdout] b346c5e22425d5aa19e1cc7eb728507e5b208c9520eb7816d51282c7221867b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d540853fd1b57c1e56905cb86b1ea87b45e72e578777007e868e7dd39514859d
[INFO] running `Command { std: "docker" "start" "-a" "d540853fd1b57c1e56905cb86b1ea87b45e72e578777007e868e7dd39514859d", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling futures-channel v0.3.15
[INFO] [stderr]     Checking futures-sink v0.3.15
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking varinteger v1.0.6
[INFO] [stderr]     Checking tracing-core v0.1.18
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]     Checking async-channel v1.6.1
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling futures-macro v0.3.15
[INFO] [stderr]    Compiling futures-util v0.3.15
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking dashmap v4.0.2
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking backroll_transport v0.1.2
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking async-executor v1.4.1
[INFO] [stderr]     Checking bevy_tasks v0.5.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]     Checking thiserror v1.0.26
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]     Checking futures v0.3.15
[INFO] [stderr]     Checking serde v1.0.126
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking backroll v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/sync.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/sync.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/sync.rs:113:21
[INFO] [stdout]     |
[INFO] [stdout] 113 |             .find(|(i, saved)| saved.0.lock().frame == frame)
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/protocol/input_buffer.rs:246:13
[INFO] [stdout]     |
[INFO] [stdout] 246 |         for i in 0..100 {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/sync.rs:113:21
[INFO] [stdout]     |
[INFO] [stdout] 113 |             .find(|(i, saved)| saved.0.lock().frame == frame)
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_prediction`
[INFO] [stdout]   --> src/input.rs:91:12
[INFO] [stdout]    |
[INFO] [stdout] 91 |     pub fn is_prediction(&self) -> bool {
[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: `last_confirmed_frame`
[INFO] [stdout]    --> src/input.rs:152:12
[INFO] [stdout]     |
[INFO] [stdout] 152 |     pub fn last_confirmed_frame(&self) -> Frame {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_confirmed_input`
[INFO] [stdout]    --> src/input.rs:204:12
[INFO] [stdout]     |
[INFO] [stdout] 204 |     pub fn get_confirmed_input(&self, frame: Frame) -> Option<&FrameInput<T::Input>> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_disconnected`
[INFO] [stdout]   --> src/protocol/mod.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |     pub fn is_disconnected(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `latest`
[INFO] [stdout]    --> src/sync.rs:125:12
[INFO] [stdout]     |
[INFO] [stdout] 125 |     pub fn latest(&self) -> Option<SavedCell<T>> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_confirmed_inputs`
[INFO] [stdout]    --> src/sync.rs:235:12
[INFO] [stdout]     |
[INFO] [stdout] 235 |     pub fn get_confirmed_inputs(&mut self, frame: Frame) -> GameInput<T::Input> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_last_saved_frame`
[INFO] [stdout]    --> src/sync.rs:276:12
[INFO] [stdout]     |
[INFO] [stdout] 276 |     pub fn get_last_saved_frame(&self) -> SavedCell<T> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_prediction`
[INFO] [stdout]   --> src/input.rs:91:12
[INFO] [stdout]    |
[INFO] [stdout] 91 |     pub fn is_prediction(&self) -> bool {
[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: `last_confirmed_frame`
[INFO] [stdout]    --> src/input.rs:152:12
[INFO] [stdout]     |
[INFO] [stdout] 152 |     pub fn last_confirmed_frame(&self) -> Frame {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_confirmed_input`
[INFO] [stdout]    --> src/input.rs:204:12
[INFO] [stdout]     |
[INFO] [stdout] 204 |     pub fn get_confirmed_input(&self, frame: Frame) -> Option<&FrameInput<T::Input>> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_disconnected`
[INFO] [stdout]   --> src/protocol/mod.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |     pub fn is_disconnected(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `latest`
[INFO] [stdout]    --> src/sync.rs:125:12
[INFO] [stdout]     |
[INFO] [stdout] 125 |     pub fn latest(&self) -> Option<SavedCell<T>> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_confirmed_inputs`
[INFO] [stdout]    --> src/sync.rs:235:12
[INFO] [stdout]     |
[INFO] [stdout] 235 |     pub fn get_confirmed_inputs(&mut self, frame: Frame) -> GameInput<T::Input> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_last_saved_frame`
[INFO] [stdout]    --> src/sync.rs:276:12
[INFO] [stdout]     |
[INFO] [stdout] 276 |     pub fn get_last_saved_frame(&self) -> SavedCell<T> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.64s
[INFO] running `Command { std: "docker" "inspect" "d540853fd1b57c1e56905cb86b1ea87b45e72e578777007e868e7dd39514859d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d540853fd1b57c1e56905cb86b1ea87b45e72e578777007e868e7dd39514859d", kill_on_drop: false }`
[INFO] [stdout] d540853fd1b57c1e56905cb86b1ea87b45e72e578777007e868e7dd39514859d