[INFO] fetching crate internal-iterator 0.2.3...
[INFO] checking internal-iterator-0.2.3 against try#c659ee110de67e82444e4b6c8407c1a9af9c2cf6 for pr-145608-1
[INFO] extracting crate internal-iterator 0.2.3 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate internal-iterator 0.2.3
[INFO] finished tweaking crates.io crate internal-iterator 0.2.3
[INFO] tweaked toml for crates.io crate internal-iterator 0.2.3 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate internal-iterator 0.2.3 on toolchain c659ee110de67e82444e4b6c8407c1a9af9c2cf6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "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" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6b0b1bee699d35897791e2432886469204bedbffd857cd7110565d82d2c126e1
[INFO] running `Command { std: "docker" "start" "-a" "6b0b1bee699d35897791e2432886469204bedbffd857cd7110565d82d2c126e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b0b1bee699d35897791e2432886469204bedbffd857cd7110565d82d2c126e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b0b1bee699d35897791e2432886469204bedbffd857cd7110565d82d2c126e1", kill_on_drop: false }`
[INFO] [stdout] 6b0b1bee699d35897791e2432886469204bedbffd857cd7110565d82d2c126e1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 16847cd1dd8a34d6cb652cd5e04eab14b91cd889302bdd18ab04bc6a23c724f2
[INFO] running `Command { std: "docker" "start" "-a" "16847cd1dd8a34d6cb652cd5e04eab14b91cd889302bdd18ab04bc6a23c724f2", kill_on_drop: false }`
[INFO] [stderr]     Checking internal-iterator v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `std::ops::ControlFlow` that must be used
[INFO] [stdout]    --> src/lib.rs:452:9
[INFO] [stdout]     |
[INFO] [stdout] 452 | /         self.try_for_each::<(), _>(|item| {
[INFO] [stdout] 453 | |             f(item);
[INFO] [stdout] 454 | |             ControlFlow::Continue(())
[INFO] [stdout] 455 | |         });
[INFO] [stdout]     | |__________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 452 |         let _ = self.try_for_each::<(), _>(|item| {
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::ops::ControlFlow` that must be used
[INFO] [stdout]   --> src/from_fn_impl.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 | /         (self.f)(&mut |item| {
[INFO] [stdout] 32 | |             match f(item) {
[INFO] [stdout] 33 | |                 ControlFlow::Continue(()) => ControlFlow::Continue(()),
[INFO] [stdout] 34 | |                 ControlFlow::Break(res) => {
[INFO] [stdout] ...  |
[INFO] [stdout] 39 | |         });
[INFO] [stdout]    | |__________^
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let _ = (self.f)(&mut |item| {
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::ops::ControlFlow` that must be used
[INFO] [stdout]    --> src/lib.rs:452:9
[INFO] [stdout]     |
[INFO] [stdout] 452 | /         self.try_for_each::<(), _>(|item| {
[INFO] [stdout] 453 | |             f(item);
[INFO] [stdout] 454 | |             ControlFlow::Continue(())
[INFO] [stdout] 455 | |         });
[INFO] [stdout]     | |__________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 452 |         let _ = self.try_for_each::<(), _>(|item| {
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::ops::ControlFlow` that must be used
[INFO] [stdout]   --> src/from_fn_impl.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 | /         (self.f)(&mut |item| {
[INFO] [stdout] 32 | |             match f(item) {
[INFO] [stdout] 33 | |                 ControlFlow::Continue(()) => ControlFlow::Continue(()),
[INFO] [stdout] 34 | |                 ControlFlow::Break(res) => {
[INFO] [stdout] ...  |
[INFO] [stdout] 39 | |         });
[INFO] [stdout]    | |__________^
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let _ = (self.f)(&mut |item| {
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `Command { std: "docker" "inspect" "16847cd1dd8a34d6cb652cd5e04eab14b91cd889302bdd18ab04bc6a23c724f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16847cd1dd8a34d6cb652cd5e04eab14b91cd889302bdd18ab04bc6a23c724f2", kill_on_drop: false }`
[INFO] [stdout] 16847cd1dd8a34d6cb652cd5e04eab14b91cd889302bdd18ab04bc6a23c724f2