[INFO] cloning repository https://github.com/xiaolitongxue666/different_type_closures
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xiaolitongxue666/different_type_closures" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxiaolitongxue666%2Fdifferent_type_closures", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxiaolitongxue666%2Fdifferent_type_closures'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6c740f9f1ed59164f25d28b0b594d5cd4fc40533
[INFO] checking xiaolitongxue666/different_type_closures against master#00bfd6b2734d9c28a147bf237490995731781fdd for pr-117984
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxiaolitongxue666%2Fdifferent_type_closures" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/xiaolitongxue666/different_type_closures on toolchain 00bfd6b2734d9c28a147bf237490995731781fdd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+00bfd6b2734d9c28a147bf237490995731781fdd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/xiaolitongxue666/different_type_closures
[INFO] finished tweaking git repo https://github.com/xiaolitongxue666/different_type_closures
[INFO] tweaked toml for git repo https://github.com/xiaolitongxue666/different_type_closures written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/xiaolitongxue666/different_type_closures 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" "+00bfd6b2734d9c28a147bf237490995731781fdd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking xiaolitongxue666/different_type_closures against try#aa7c6ba69acce8b10a275eabfe6157ea72c8b599 for pr-117984
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxiaolitongxue666%2Fdifferent_type_closures" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/xiaolitongxue666/different_type_closures on toolchain aa7c6ba69acce8b10a275eabfe6157ea72c8b599
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+aa7c6ba69acce8b10a275eabfe6157ea72c8b599" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/xiaolitongxue666/different_type_closures
[INFO] finished tweaking git repo https://github.com/xiaolitongxue666/different_type_closures
[INFO] tweaked toml for git repo https://github.com/xiaolitongxue666/different_type_closures written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/xiaolitongxue666/different_type_closures 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" "+aa7c6ba69acce8b10a275eabfe6157ea72c8b599" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking xiaolitongxue666/different_type_closures against try#aa7c6ba69acce8b10a275eabfe6157ea72c8b599 for pr-117984
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxiaolitongxue666%2Fdifferent_type_closures" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/xiaolitongxue666/different_type_closures on toolchain aa7c6ba69acce8b10a275eabfe6157ea72c8b599
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+aa7c6ba69acce8b10a275eabfe6157ea72c8b599" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/xiaolitongxue666/different_type_closures
[INFO] finished tweaking git repo https://github.com/xiaolitongxue666/different_type_closures
[INFO] tweaked toml for git repo https://github.com/xiaolitongxue666/different_type_closures written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/xiaolitongxue666/different_type_closures 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" "+aa7c6ba69acce8b10a275eabfe6157ea72c8b599" "fetch" "--manifest-path" "Cargo.toml", 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+aa7c6ba69acce8b10a275eabfe6157ea72c8b599" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 21fcb2a67347c53dd8ae97672e7116a6e3ce3fae101c99952a3ba897316e7019
[INFO] running `Command { std: "docker" "start" "-a" "21fcb2a67347c53dd8ae97672e7116a6e3ce3fae101c99952a3ba897316e7019", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "21fcb2a67347c53dd8ae97672e7116a6e3ce3fae101c99952a3ba897316e7019", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21fcb2a67347c53dd8ae97672e7116a6e3ce3fae101c99952a3ba897316e7019", kill_on_drop: false }`
[INFO] [stdout] 21fcb2a67347c53dd8ae97672e7116a6e3ce3fae101c99952a3ba897316e7019
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+aa7c6ba69acce8b10a275eabfe6157ea72c8b599" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3abab118ae91e8cdf809a1be96aa306bd9720051c5b5c7d3233c0100dbdcd0fe
[INFO] running `Command { std: "docker" "start" "-a" "3abab118ae91e8cdf809a1be96aa306bd9720051c5b5c7d3233c0100dbdcd0fe", kill_on_drop: false }`
[INFO] [stderr]     Checking different_type_closures v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `MyStruct` is never constructed
[INFO] [stdout]  --> src/main.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct MyStruct {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get_number`, `inc_number`, and `destructor` are never used
[INFO] [stdout]   --> src/main.rs:7:8
[INFO] [stdout]    |
[INFO] [stdout] 6  | impl MyStruct {
[INFO] [stdout]    | ------------- associated items in this implementation
[INFO] [stdout] 7  |     fn new (text: &'static str, number: u32) -> MyStruct {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     fn get_number(&self)-> u32{
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     fn inc_number (&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn destructor (self) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_fn` is never used
[INFO] [stdout]   --> src/main.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn is_fn <A, R>(_x: fn(A) -> R) {}
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_Fn` is never used
[INFO] [stdout]   --> src/main.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn is_Fn <A, R, F: Fn(A) -> R> (_x: &F) {}
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_FnMut` is never used
[INFO] [stdout]   --> src/main.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn is_FnMut <A, R, F: FnMut(A) -> R> (_x: &F) {} fn is_FnOnce <A, R, F: FnOnce(A) -> R> (_x: &F) {}
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_FnOnce` is never used
[INFO] [stdout]   --> src/main.rs:27:53
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn is_FnMut <A, R, F: FnMut(A) -> R> (_x: &F) {} fn is_FnOnce <A, R, F: FnOnce(A) -> R> (_x: &F) {}
[INFO] [stdout]    |                                                     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_Fn` should have a snake case name
[INFO] [stdout]   --> src/main.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn is_Fn <A, R, F: Fn(A) -> R> (_x: &F) {}
[INFO] [stdout]    |    ^^^^^ help: convert the identifier to snake case (notice the capitalization): `is_fn`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_FnMut` should have a snake case name
[INFO] [stdout]   --> src/main.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn is_FnMut <A, R, F: FnMut(A) -> R> (_x: &F) {} fn is_FnOnce <A, R, F: FnOnce(A) -> R> (_x: &F) {}
[INFO] [stdout]    |    ^^^^^^^^ help: convert the identifier to snake case: `is_fn_mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_FnOnce` should have a snake case name
[INFO] [stdout]   --> src/main.rs:27:53
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn is_FnMut <A, R, F: FnMut(A) -> R> (_x: &F) {} fn is_FnOnce <A, R, F: FnOnce(A) -> R> (_x: &F) {}
[INFO] [stdout]    |                                                     ^^^^^^^^^ help: convert the identifier to snake case: `is_fn_once`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_Fn` should have a snake case name
[INFO] [stdout]   --> src/main.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn is_Fn <A, R, F: Fn(A) -> R> (_x: &F) {}
[INFO] [stdout]    |    ^^^^^ help: convert the identifier to snake case (notice the capitalization): `is_fn`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_FnMut` should have a snake case name
[INFO] [stdout]   --> src/main.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn is_FnMut <A, R, F: FnMut(A) -> R> (_x: &F) {} fn is_FnOnce <A, R, F: FnOnce(A) -> R> (_x: &F) {}
[INFO] [stdout]    |    ^^^^^^^^ help: convert the identifier to snake case: `is_fn_mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_FnOnce` should have a snake case name
[INFO] [stdout]   --> src/main.rs:27:53
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn is_FnMut <A, R, F: FnMut(A) -> R> (_x: &F) {} fn is_FnOnce <A, R, F: FnOnce(A) -> R> (_x: &F) {}
[INFO] [stdout]    |                                                     ^^^^^^^^^ help: convert the identifier to snake case: `is_fn_once`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] running `Command { std: "docker" "inspect" "3abab118ae91e8cdf809a1be96aa306bd9720051c5b5c7d3233c0100dbdcd0fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3abab118ae91e8cdf809a1be96aa306bd9720051c5b5c7d3233c0100dbdcd0fe", kill_on_drop: false }`
[INFO] [stdout] 3abab118ae91e8cdf809a1be96aa306bd9720051c5b5c7d3233c0100dbdcd0fe