[INFO] fetching crate task-group 0.2.2...
[INFO] testing task-group-0.2.2 against master#caccb4d0368bd918ef6668af8e13834d07040417 for pr-146098-1
[INFO] extracting crate task-group 0.2.2 into /workspace/builds/worker-0-tc1/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-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate task-group 0.2.2 on toolchain caccb4d0368bd918ef6668af8e13834d07040417
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "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" "+caccb4d0368bd918ef6668af8e13834d07040417" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded signal-hook-registry v1.3.0
[INFO] [stderr]   Downloaded lock_api v0.4.2
[INFO] [stderr]   Downloaded mio v0.7.11
[INFO] [stderr]   Downloaded syn v1.0.67
[INFO] [stderr]   Downloaded tokio v1.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3b56ced2695119d280f23d6158558c374d6b69cae35ec7284ef537f0185904dc
[INFO] running `Command { std: "docker" "start" "-a" "3b56ced2695119d280f23d6158558c374d6b69cae35ec7284ef537f0185904dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3b56ced2695119d280f23d6158558c374d6b69cae35ec7284ef537f0185904dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b56ced2695119d280f23d6158558c374d6b69cae35ec7284ef537f0185904dc", kill_on_drop: false }`
[INFO] [stdout] 3b56ced2695119d280f23d6158558c374d6b69cae35ec7284ef537f0185904dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aeafe1f87e8470cc8c83d32fcbd19fd031e5e8d808b07e4ddbacb9993f44d5aa
[INFO] running `Command { std: "docker" "start" "-a" "aeafe1f87e8470cc8c83d32fcbd19fd031e5e8d808b07e4ddbacb9993f44d5aa", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.91
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.67
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling bytes v1.0.1
[INFO] [stderr]    Compiling pin-project-lite v0.2.6
[INFO] [stderr]    Compiling once_cell v1.7.2
[INFO] [stderr]    Compiling instant v0.1.9
[INFO] [stderr]    Compiling log v0.4.14
[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 mio v0.7.11
[INFO] [stderr]    Compiling signal-hook-registry v1.3.0
[INFO] [stderr]    Compiling num_cpus v1.13.0
[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 15.52s
[INFO] running `Command { std: "docker" "inspect" "aeafe1f87e8470cc8c83d32fcbd19fd031e5e8d808b07e4ddbacb9993f44d5aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aeafe1f87e8470cc8c83d32fcbd19fd031e5e8d808b07e4ddbacb9993f44d5aa", kill_on_drop: false }`
[INFO] [stdout] aeafe1f87e8470cc8c83d32fcbd19fd031e5e8d808b07e4ddbacb9993f44d5aa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dc95257e5d981352612ce28020b8f037133a9134d9bd4897406c123c7d113adb
[INFO] running `Command { std: "docker" "start" "-a" "dc95257e5d981352612ce28020b8f037133a9134d9bd4897406c123c7d113adb", 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 3.81s
[INFO] running `Command { std: "docker" "inspect" "dc95257e5d981352612ce28020b8f037133a9134d9bd4897406c123c7d113adb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc95257e5d981352612ce28020b8f037133a9134d9bd4897406c123c7d113adb", kill_on_drop: false }`
[INFO] [stdout] dc95257e5d981352612ce28020b8f037133a9134d9bd4897406c123c7d113adb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b5320993b6d44008be648e2c5e772c97d85cd927bb85711a29bc2fc322a025f3
[INFO] running `Command { std: "docker" "start" "-a" "b5320993b6d44008be648e2c5e772c97d85cd927bb85711a29bc2fc322a025f3", kill_on_drop: false }`
[INFO] [stderr] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stderr]    --> src/lib.rs:566:13
[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 0.08s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/task_group-13d3ee6529039d09)
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test test::empty_child ... ok
[INFO] [stdout] test test::no_task ... ok
[INFO] [stdout] test test::one_empty_task ... ok
[INFO] [stdout] test test::many_nested_children ... ok
[INFO] [stdout] test test::root_task_errors ... ok
[INFO] [stdout] test test::sizes_of_futures ... ok
[INFO] [stdout] test test::many_nested_children_error ... ok
[INFO] [stdout] test test::child_task_errors ... ok
[INFO] [stdout] test test::root_task_panics ... ok
[INFO] [stdout] test test::child_task_panics ... ok
[INFO] [stdout] test test::child_sleep_timeout ... ok
[INFO] [stderr]    Doc-tests task_group
[INFO] [stdout] test test::child_sleep_no_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] [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" "b5320993b6d44008be648e2c5e772c97d85cd927bb85711a29bc2fc322a025f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5320993b6d44008be648e2c5e772c97d85cd927bb85711a29bc2fc322a025f3", kill_on_drop: false }`
[INFO] [stdout] b5320993b6d44008be648e2c5e772c97d85cd927bb85711a29bc2fc322a025f3