[INFO] fetching crate kannon 0.0.2...
[INFO] checking kannon-0.0.2 against master#f609b7e0586f81fefb3523e3e17adf779ac416be for pr-129466-2
[INFO] extracting crate kannon 0.0.2 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate kannon 0.0.2 on toolchain f609b7e0586f81fefb3523e3e17adf779ac416be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate kannon 0.0.2
[INFO] finished tweaking crates.io crate kannon 0.0.2
[INFO] tweaked toml for crates.io crate kannon 0.0.2 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 21 packages to latest compatible versions
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (available: v0.13.2+wasi-0.2.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `panic` setting is ignored for `test` profile
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 158da693bb8a6732c9d39813abeef6a4bc78e4336feadffe5343209f14fda806
[INFO] running `Command { std: "docker" "start" "-a" "158da693bb8a6732c9d39813abeef6a4bc78e4336feadffe5343209f14fda806", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "158da693bb8a6732c9d39813abeef6a4bc78e4336feadffe5343209f14fda806", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "158da693bb8a6732c9d39813abeef6a4bc78e4336feadffe5343209f14fda806", kill_on_drop: false }`
[INFO] [stdout] 158da693bb8a6732c9d39813abeef6a4bc78e4336feadffe5343209f14fda806
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 44cd3027b88ca4503df80a602a9f0a8dc4337fd1ec35558e7910d9f67968d134
[INFO] running `Command { std: "docker" "start" "-a" "44cd3027b88ca4503df80a602a9f0a8dc4337fd1ec35558e7910d9f67968d134", kill_on_drop: false }`
[INFO] [stderr] warning: `panic` setting is ignored for `test` profile
[INFO] [stderr]     Checking kannon v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0425]: cannot find function `available_concurrency` in module `thread`
[INFO] [stdout]    --> src/task/worker.rs:192:45
[INFO] [stdout]     |
[INFO] [stdout] 192 |         let available_concurrency = thread::available_concurrency()
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^ not found in `thread`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `available_concurrency`
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(available_concurrency)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `available_concurrency` in module `thread`
[INFO] [stdout]    --> src/task/worker.rs:192:45
[INFO] [stdout]     |
[INFO] [stdout] 192 |         let available_concurrency = thread::available_concurrency()
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^ not found in `thread`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `available_concurrency` in module `thread`
[INFO] [stdout]    --> src/task/worker.rs:363:45
[INFO] [stdout]     |
[INFO] [stdout] 363 |         let available_concurrency = thread::available_concurrency()
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^ not found in `thread`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `available_concurrency`
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(available_concurrency)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/task/group.rs:404:9
[INFO] [stdout]     |
[INFO] [stdout] 403 |           todo!("Not yet implemented");
[INFO] [stdout]     |           ---------------------------- any code following this expression is unreachable
[INFO] [stdout] 404 | /         let pred: &dyn Fn(&&GroupHandle) -> bool = &|x: &&GroupHandle| match (*x).value_as_ref() {
[INFO] [stdout] 405 | |             None => false,
[INFO] [stdout] 406 | |             Some(accessor) => accessor.has_predecessors(),
[INFO] [stdout] 407 | |         };
[INFO] [stdout]     | |__________^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/task/group.rs:404:9
[INFO] [stdout]     |
[INFO] [stdout] 403 |           todo!("Not yet implemented");
[INFO] [stdout]     |           ---------------------------- any code following this expression is unreachable
[INFO] [stdout] 404 | /         let pred: &dyn Fn(&&GroupHandle) -> bool = &|x: &&GroupHandle| match (*x).value_as_ref() {
[INFO] [stdout] 405 | |             None => false,
[INFO] [stdout] 406 | |             Some(accessor) => accessor.has_predecessors(),
[INFO] [stdout] 407 | |         };
[INFO] [stdout]     | |__________^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `kannon` (lib) due to 3 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 3 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `kannon` (lib test) due to 4 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "44cd3027b88ca4503df80a602a9f0a8dc4337fd1ec35558e7910d9f67968d134", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44cd3027b88ca4503df80a602a9f0a8dc4337fd1ec35558e7910d9f67968d134", kill_on_drop: false }`
[INFO] [stdout] 44cd3027b88ca4503df80a602a9f0a8dc4337fd1ec35558e7910d9f67968d134