[INFO] cloning repository https://github.com/cucumber007/rust_sandbox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cucumber007/rust_sandbox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcucumber007%2Frust_sandbox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcucumber007%2Frust_sandbox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ca2d7847c5aea19cd524ff527f62a41cd947f24b
[INFO] checking cucumber007/rust_sandbox/ca2d7847c5aea19cd524ff527f62a41cd947f24b against try#0edd13c68435d50367c79cef43ac2768d2ec4f3d for pr-129422
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcucumber007%2Frust_sandbox" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cucumber007/rust_sandbox on toolchain 0edd13c68435d50367c79cef43ac2768d2ec4f3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cucumber007/rust_sandbox
[INFO] finished tweaking git repo https://github.com/cucumber007/rust_sandbox
[INFO] tweaked toml for git repo https://github.com/cucumber007/rust_sandbox written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/cucumber007/rust_sandbox 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" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3406e6bb2e4128ad17ecaf4c546717dbd7ea786878f5292e24195022bc584244
[INFO] running `Command { std: "docker" "start" "-a" "3406e6bb2e4128ad17ecaf4c546717dbd7ea786878f5292e24195022bc584244", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3406e6bb2e4128ad17ecaf4c546717dbd7ea786878f5292e24195022bc584244", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3406e6bb2e4128ad17ecaf4c546717dbd7ea786878f5292e24195022bc584244", kill_on_drop: false }`
[INFO] [stdout] 3406e6bb2e4128ad17ecaf4c546717dbd7ea786878f5292e24195022bc584244
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3a8990ad443f6ec12deb1888dd8aa015b83b333b46cc04b14c4435acf9c5f4bd
[INFO] running `Command { std: "docker" "start" "-a" "3a8990ad443f6ec12deb1888dd8aa015b83b333b46cc04b14c4435acf9c5f4bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking test_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: bounds on `Self: Drop` are most likely incorrect, consider instead using `std::mem::needs_drop` to detect whether a type can be trivially dropped
[INFO] [stdout]  --> src/thread_pool.rs:6:39
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub trait ThreadPoolExecutor<Result>: Drop {
[INFO] [stdout]   |                                       ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(drop_bounds)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: where clauses on type aliases are not enforced
[INFO] [stdout]   --> src/thread_pool.rs:24:20
[INFO] [stdout]    |
[INFO] [stdout] 24 | type Task<T> where T: Send + Sync = Box<dyn FnOnce() -> T + Send + Sync>;
[INFO] [stdout]    |              ------^^^^^^^^^^^^^^
[INFO] [stdout]    |              |     |
[INFO] [stdout]    |              |     will not be checked at usage sites of the type alias
[INFO] [stdout]    |              help: remove this where clause
[INFO] [stdout]    |
[INFO] [stdout]    = note: this is a known limitation of the type checker that may be lifted in a future edition.
[INFO] [stdout]            see issue #112792 <https://github.com/rust-lang/rust/issues/112792> for more information
[INFO] [stdout]    = help: add `#![feature(lazy_type_alias)]` to the crate attributes to enable the desired semantics
[INFO] [stdout]    = note: `#[warn(type_alias_bounds)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on `Self: Drop` are most likely incorrect, consider instead using `std::mem::needs_drop` to detect whether a type can be trivially dropped
[INFO] [stdout]  --> src/thread_pool.rs:6:39
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub trait ThreadPoolExecutor<Result>: Drop {
[INFO] [stdout]   |                                       ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(drop_bounds)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: where clauses on type aliases are not enforced
[INFO] [stdout]   --> src/thread_pool.rs:24:20
[INFO] [stdout]    |
[INFO] [stdout] 24 | type Task<T> where T: Send + Sync = Box<dyn FnOnce() -> T + Send + Sync>;
[INFO] [stdout]    |              ------^^^^^^^^^^^^^^
[INFO] [stdout]    |              |     |
[INFO] [stdout]    |              |     will not be checked at usage sites of the type alias
[INFO] [stdout]    |              help: remove this where clause
[INFO] [stdout]    |
[INFO] [stdout]    = note: this is a known limitation of the type checker that may be lifted in a future edition.
[INFO] [stdout]            see issue #112792 <https://github.com/rust-lang/rust/issues/112792> for more information
[INFO] [stdout]    = help: add `#![feature(lazy_type_alias)]` to the crate attributes to enable the desired semantics
[INFO] [stdout]    = note: `#[warn(type_alias_bounds)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.70s
[INFO] running `Command { std: "docker" "inspect" "3a8990ad443f6ec12deb1888dd8aa015b83b333b46cc04b14c4435acf9c5f4bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a8990ad443f6ec12deb1888dd8aa015b83b333b46cc04b14c4435acf9c5f4bd", kill_on_drop: false }`
[INFO] [stdout] 3a8990ad443f6ec12deb1888dd8aa015b83b333b46cc04b14c4435acf9c5f4bd