[INFO] fetching crate task-group 0.2.2...
[INFO] testing task-group-0.2.2 against try#b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b for pr-145330-1
[INFO] extracting crate task-group 0.2.2 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate task-group 0.2.2
[INFO] finished tweaking crates.io crate task-group 0.2.2
[INFO] tweaked toml for crates.io crate task-group 0.2.2 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate task-group 0.2.2 on toolchain b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate task-group 0.2.2 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" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 11fcf5bfbc8aab9f91de253174ca6dd35af33b2c2ef3576d750818ffafedb0e5
[INFO] running `Command { std: "docker" "start" "-a" "11fcf5bfbc8aab9f91de253174ca6dd35af33b2c2ef3576d750818ffafedb0e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11fcf5bfbc8aab9f91de253174ca6dd35af33b2c2ef3576d750818ffafedb0e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11fcf5bfbc8aab9f91de253174ca6dd35af33b2c2ef3576d750818ffafedb0e5", kill_on_drop: false }`
[INFO] [stdout] 11fcf5bfbc8aab9f91de253174ca6dd35af33b2c2ef3576d750818ffafedb0e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3a9e6f58d0a705c68cf1281082a50a638ebe47bf6e06107817d9d0e72f6bc24b
[INFO] running `Command { std: "docker" "start" "-a" "3a9e6f58d0a705c68cf1281082a50a638ebe47bf6e06107817d9d0e72f6bc24b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.91
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling syn v1.0.67
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling instant v0.1.9
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling once_cell v1.7.2
[INFO] [stderr]    Compiling bytes v1.0.1
[INFO] [stderr]    Compiling pin-project-lite v0.2.6
[INFO] [stderr]    Compiling lock_api v0.4.2
[INFO] [stderr]    Compiling tokio v1.4.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling signal-hook-registry v1.3.0
[INFO] [stderr]    Compiling mio v0.7.11
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling tokio-macros v1.1.0
[INFO] [stderr]    Compiling task-group v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.22s
[INFO] running `Command { std: "docker" "inspect" "3a9e6f58d0a705c68cf1281082a50a638ebe47bf6e06107817d9d0e72f6bc24b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a9e6f58d0a705c68cf1281082a50a638ebe47bf6e06107817d9d0e72f6bc24b", kill_on_drop: false }`
[INFO] [stdout] 3a9e6f58d0a705c68cf1281082a50a638ebe47bf6e06107817d9d0e72f6bc24b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6fa9d6ddc560df75e1e6ce21245a7f7c9dc987b354c5e3b581fc8ef45388f3e9
[INFO] running `Command { std: "docker" "start" "-a" "6fa9d6ddc560df75e1e6ce21245a7f7c9dc987b354c5e3b581fc8ef45388f3e9", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]    Compiling task-group v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/lib.rs:566:13
[INFO] [stdout]     |
[INFO] [stdout] 566 |             drop(big_object);
[INFO] [stdout]     |             ^^^^^----------^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  argument has type `[u8; 4096]`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 566 -             drop(big_object);
[INFO] [stdout] 566 +             let _ = big_object;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.51s
[INFO] running `Command { std: "docker" "inspect" "6fa9d6ddc560df75e1e6ce21245a7f7c9dc987b354c5e3b581fc8ef45388f3e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6fa9d6ddc560df75e1e6ce21245a7f7c9dc987b354c5e3b581fc8ef45388f3e9", kill_on_drop: false }`
[INFO] [stdout] 6fa9d6ddc560df75e1e6ce21245a7f7c9dc987b354c5e3b581fc8ef45388f3e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e918c846bea8125e70b183e4e309b51c3655d8bb9493ccfba8e69698614a45b6
[INFO] running `Command { std: "docker" "start" "-a" "e918c846bea8125e70b183e4e309b51c3655d8bb9493ccfba8e69698614a45b6", kill_on_drop: false }`
[INFO] [stderr] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout] 
[INFO] [stderr]    --> src/lib.rs:566:13
[INFO] [stdout] running 12 tests
[INFO] [stderr]     |
[INFO] [stderr] 566 |             drop(big_object);
[INFO] [stderr]     |             ^^^^^----------^
[INFO] [stderr]     |                  |
[INFO] [stderr]     |                  argument has type `[u8; 4096]`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]     |
[INFO] [stderr] 566 -             drop(big_object);
[INFO] [stderr] 566 +             let _ = big_object;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `task-group` (lib test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/task_group-13d3ee6529039d09)
[INFO] [stdout] test test::child_task_errors ... ok
[INFO] [stdout] test test::no_task ... ok
[INFO] [stdout] test test::many_nested_children_error ... ok
[INFO] [stdout] test test::one_empty_task ... ok
[INFO] [stdout] test test::sizes_of_futures ... ok
[INFO] [stdout] test test::many_nested_children ... ok
[INFO] [stdout] test test::empty_child ... ok
[INFO] [stdout] test test::root_task_errors ... ok
[INFO] [stdout] test test::child_task_panics ... ok
[INFO] [stdout] test test::root_task_panics ... ok
[INFO] [stdout] test test::child_sleep_no_timeout ... ok
[INFO] [stdout] test test::child_sleep_timeout ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests task_group
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e918c846bea8125e70b183e4e309b51c3655d8bb9493ccfba8e69698614a45b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e918c846bea8125e70b183e4e309b51c3655d8bb9493ccfba8e69698614a45b6", kill_on_drop: false }`
[INFO] [stdout] e918c846bea8125e70b183e4e309b51c3655d8bb9493ccfba8e69698614a45b6