[INFO] fetching crate holder 0.14.0...
[INFO] checking holder-0.14.0 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate holder 0.14.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate holder 0.14.0
[INFO] finished tweaking crates.io crate holder 0.14.0
[INFO] tweaked toml for crates.io crate holder 0.14.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate holder 0.14.0 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 7 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] db0a373f92525c83c5cb7b3fd4ce4e64acb90688c83fd8152040f2cb0bcd5f3f
[INFO] running `Command { std: "docker" "start" "-a" "db0a373f92525c83c5cb7b3fd4ce4e64acb90688c83fd8152040f2cb0bcd5f3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db0a373f92525c83c5cb7b3fd4ce4e64acb90688c83fd8152040f2cb0bcd5f3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db0a373f92525c83c5cb7b3fd4ce4e64acb90688c83fd8152040f2cb0bcd5f3f", kill_on_drop: false }`
[INFO] [stdout] db0a373f92525c83c5cb7b3fd4ce4e64acb90688c83fd8152040f2cb0bcd5f3f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 65d657aa98e8982f00881d0cd7bf70642a0656b1d4e9fc4ea4bd847b937375b2
[INFO] running `Command { std: "docker" "start" "-a" "65d657aa98e8982f00881d0cd7bf70642a0656b1d4e9fc4ea4bd847b937375b2", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-segmentation v1.12.0
[INFO] [stderr]    Compiling convert_case v0.6.0
[INFO] [stderr]    Compiling holder_derive v0.14.0
[INFO] [stderr]     Checking holder v0.14.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `token`
[INFO] [stdout]  --> tests/test2.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let token: &mut Token<i32> = wrapper.token_mut();
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_token`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `token`
[INFO] [stdout]   --> tests/test2.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let token: &Token<i32> = wrapper.token();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_token`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `game_state`
[INFO] [stdout]   --> tests/test2.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let game_state: &GameState = wrapper.game_state();
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_game_state`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `game_state_mut`
[INFO] [stdout]   --> tests/test2.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let game_state_mut: &mut GameState = wrapper.game_state_mut();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_game_state_mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Play` is never constructed
[INFO] [stdout]   --> tests/test2.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 62 | enum GameState {
[INFO] [stdout]    |      --------- variant in this enum
[INFO] [stdout] 63 |     Idle,
[INFO] [stdout] 64 |     Play,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `token`
[INFO] [stdout]  --> tests/test2.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let token: &mut Token<i32> = wrapper.token_mut();
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_token`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `token`
[INFO] [stdout]   --> tests/test2.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let token: &Token<i32> = wrapper.token();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_token`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `game_state`
[INFO] [stdout]   --> tests/test2.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let game_state: &GameState = wrapper.game_state();
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_game_state`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `game_state_mut`
[INFO] [stdout]   --> tests/test2.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let game_state_mut: &mut GameState = wrapper.game_state_mut();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_game_state_mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `token`
[INFO] [stdout]   --> tests/test.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let token: &mut Token<i32> = wrapper.token_mut();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_token`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `token`
[INFO] [stdout]   --> tests/test.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let token: &Token<i32> = wrapper.token();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_token`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `game_state`
[INFO] [stdout]   --> tests/test.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let game_state: &GameState = wrapper.game_state();
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_game_state`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `game_state_mut`
[INFO] [stdout]   --> tests/test.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let game_state_mut: &mut GameState = wrapper.game_state_mut();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_game_state_mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Play` is never constructed
[INFO] [stdout]   --> tests/test.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | enum GameState {
[INFO] [stdout]    |      --------- variant in this enum
[INFO] [stdout] 38 |     Idle,
[INFO] [stdout] 39 |     Play,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> tests/test2.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Wrapper` is never constructed
[INFO] [stdout]   --> tests/test2.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct Wrapper<T: Default>
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Token` is never constructed
[INFO] [stdout]   --> tests/test2.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | struct Token<T: Default>(PhantomData<T>)
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `TokenHolder` is never used
[INFO] [stdout]   --> tests/test2.rs:54:7
[INFO] [stdout]    |
[INFO] [stdout] 54 | trait TokenHolder<T: Default>
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `GameState` is never used
[INFO] [stdout]   --> tests/test2.rs:62:6
[INFO] [stdout]    |
[INFO] [stdout] 62 | enum GameState {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `GameStateHolder` is never used
[INFO] [stdout]   --> tests/test2.rs:67:7
[INFO] [stdout]    |
[INFO] [stdout] 67 | trait GameStateHolder {
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.25s
[INFO] running `Command { std: "docker" "inspect" "65d657aa98e8982f00881d0cd7bf70642a0656b1d4e9fc4ea4bd847b937375b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65d657aa98e8982f00881d0cd7bf70642a0656b1d4e9fc4ea4bd847b937375b2", kill_on_drop: false }`
[INFO] [stdout] 65d657aa98e8982f00881d0cd7bf70642a0656b1d4e9fc4ea4bd847b937375b2