[INFO] fetching crate reflux 6.4.2...
[INFO] checking reflux-6.4.2 against 1ed2df61a19042f231709eb05d032ae9e2cb2084 for pr-160235
[INFO] extracting crate reflux 6.4.2 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate reflux 6.4.2
[INFO] finished tweaking crates.io crate reflux 6.4.2
[INFO] tweaked toml for crates.io crate reflux 6.4.2 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate reflux 6.4.2 on toolchain 1ed2df61a19042f231709eb05d032ae9e2cb2084
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1ed2df61a19042f231709eb05d032ae9e2cb2084" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate reflux 6.4.2 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" "+1ed2df61a19042f231709eb05d032ae9e2cb2084" "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-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:00c5645b54fe3ce5dae1417175e3c7fb6a6646c021d554ecd63a097b8b9f3602" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 3d1e555643b20fdec6ff570a2e07070821d6ec9592ebfa9fb102fde971ee3ee0
[INFO] running `Command { std: "docker" "start" "3d1e555643b20fdec6ff570a2e07070821d6ec9592ebfa9fb102fde971ee3ee0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3d1e555643b20fdec6ff570a2e07070821d6ec9592ebfa9fb102fde971ee3ee0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "3d1e555643b20fdec6ff570a2e07070821d6ec9592ebfa9fb102fde971ee3ee0" "/opt/rustwide/cargo-home/bin/cargo" "+1ed2df61a19042f231709eb05d032ae9e2cb2084" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3d1e555643b20fdec6ff570a2e07070821d6ec9592ebfa9fb102fde971ee3ee0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "3d1e555643b20fdec6ff570a2e07070821d6ec9592ebfa9fb102fde971ee3ee0" "/opt/rustwide/cargo-home/bin/cargo" "+1ed2df61a19042f231709eb05d032ae9e2cb2084" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]     Checking crossbeam-channel v0.5.14
[INFO] [stderr]     Checking reflux v6.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: feature `coroutines` is declared but not used
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_features)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: feature `stmt_expr_attributes` is declared but not used
[INFO] [stdout]  --> src/lib.rs:1:41
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
[INFO] [stdout]   |                                         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]     --> src/lib.rs:1355:9
[INFO] [stdout]      |
[INFO] [stdout] 1304 |         return;
[INFO] [stdout]      |         ------ any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 1355 |         yield TransformerResult::Effect(TransformerEffectType::Debug($a));
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]      |
[INFO] [stdout]     ::: src/tests.rs:481:9
[INFO] [stdout]      |
[INFO] [stdout]  481 |         effect_debug!(vec!["Invalid effect".to_string()]);
[INFO] [stdout]      |         ------------------------------------------------- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]      = note: this warning originates in the macro `effect_debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]     --> src/lib.rs:1355:9
[INFO] [stdout]      |
[INFO] [stdout] 1319 |         return;
[INFO] [stdout]      |         ------ any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 1355 |         yield TransformerResult::Effect(TransformerEffectType::Debug($a));
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]      |
[INFO] [stdout]     ::: src/tests.rs:519:9
[INFO] [stdout]      |
[INFO] [stdout]  519 |         effect_debug!(vec!["Invalid effect".to_string()]);
[INFO] [stdout]      |         ------------------------------------------------- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: this warning originates in the macro `effect_debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.78s
[INFO] running `Command { std: "docker" "inspect" "3d1e555643b20fdec6ff570a2e07070821d6ec9592ebfa9fb102fde971ee3ee0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d1e555643b20fdec6ff570a2e07070821d6ec9592ebfa9fb102fde971ee3ee0", kill_on_drop: false }`
[INFO] [stdout] 3d1e555643b20fdec6ff570a2e07070821d6ec9592ebfa9fb102fde971ee3ee0
