[INFO] crate futures-test-preview 0.3.0-alpha.19 is already in cache
[INFO] testing futures-test-preview-0.3.0-alpha.19 against try#41997647ba6a77908f6ef64401414feb00bccf16 for pr-71274
[INFO] extracting crate futures-test-preview 0.3.0-alpha.19 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate futures-test-preview 0.3.0-alpha.19 on toolchain 41997647ba6a77908f6ef64401414feb00bccf16
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate futures-test-preview 0.3.0-alpha.19
[INFO] finished tweaking crates.io crate futures-test-preview 0.3.0-alpha.19
[INFO] tweaked toml for crates.io crate futures-test-preview 0.3.0-alpha.19 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2b80f821f4626d55cc8287ee95f637d141325f599518866566b67e38e7126ba8
[INFO] running `"docker" "start" "-a" "2b80f821f4626d55cc8287ee95f637d141325f599518866566b67e38e7126ba8"`
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-test-preview v0.3.0-alpha.19 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.69s
[INFO] running `"docker" "inspect" "2b80f821f4626d55cc8287ee95f637d141325f599518866566b67e38e7126ba8"`
[INFO] running `"docker" "rm" "-f" "2b80f821f4626d55cc8287ee95f637d141325f599518866566b67e38e7126ba8"`
[INFO] [stdout] 2b80f821f4626d55cc8287ee95f637d141325f599518866566b67e38e7126ba8
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 38951f49d06c2c063e0709c36b529892bfa56258abbb3c1f74649f1f4ec07d1f
[INFO] running `"docker" "start" "-a" "38951f49d06c2c063e0709c36b529892bfa56258abbb3c1f74649f1f4ec07d1f"`
[INFO] [stderr]    Compiling futures-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-test-preview v0.3.0-alpha.19 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.72s
[INFO] running `"docker" "inspect" "38951f49d06c2c063e0709c36b529892bfa56258abbb3c1f74649f1f4ec07d1f"`
[INFO] running `"docker" "rm" "-f" "38951f49d06c2c063e0709c36b529892bfa56258abbb3c1f74649f1f4ec07d1f"`
[INFO] [stdout] 38951f49d06c2c063e0709c36b529892bfa56258abbb3c1f74649f1f4ec07d1f
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 094f34289ac6c509d149a39e33899a1a2b8d2142b6e2199021d7e600a13d0a8a
[INFO] running `"docker" "start" "-a" "094f34289ac6c509d149a39e33899a1a2b8d2142b6e2199021d7e600a13d0a8a"`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.15s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/futures_test-873a1455bfbede36
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test future::assert_unmoved::tests::dont_panic_when_not_polled ... ok
[INFO] [stdout] test future::assert_unmoved::tests::dont_double_panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests futures_test
[INFO] [stdout] 
[INFO] [stdout] running 22 tests
[INFO] [stdout] test src/assert.rs - assert_stream_pending (line 11) ... ok
[INFO] [stdout] test src/assert.rs - assert_stream_done (line 89) ... ok
[INFO] [stdout] test src/future/mod.rs - future::FutureTestExt::pending_once (line 37) ... ok
[INFO] [stdout] test src/assert.rs - assert_stream_next (line 47) ... ok
[INFO] [stdout] test src/future/mod.rs - future::FutureTestExt::interleave_pending (line 88) ... ok
[INFO] [stdout] test src/io/read/mod.rs - io::read::AsyncReadTestExt::interleave_pending (line 45) ... ok
[INFO] [stdout] test src/future/mod.rs - future::FutureTestExt::run_in_background (line 63) ... ok
[INFO] [stdout] test src/io/read/mod.rs - io::read::AsyncReadTestExt::interleave_pending (line 15) ... ok
[INFO] [stdout] test src/io/read/mod.rs - io::read::AsyncReadTestExt::limited (line 79) ... ok
[INFO] [stdout] test src/task/context.rs - task::context::noop_context (line 24) ... ok
[INFO] [stdout] test src/stream/mod.rs - stream::StreamTestExt::interleave_pending (line 14) ... ok
[INFO] [stdout] test src/io/write/mod.rs - io::write::AsyncWriteTestExt::interleave_pending_write (line 15) ... ok
[INFO] [stdout] test src/io/write/mod.rs - io::write::AsyncWriteTestExt::limited_write (line 55) ... ok
[INFO] [stdout] test src/task/context.rs - task::context::panic_context (line 9) ... ok
[INFO] [stdout] test src/task/noop_spawner.rs - task::noop_spawner::NoopSpawner (line 9) ... ok
[INFO] [stdout] test src/task/noop_spawner.rs - task::noop_spawner::noop_spawner_mut (line 47) ... ok
[INFO] [stdout] test src/task/wake_counter.rs - task::wake_counter::new_count_waker (line 44) ... ok
[INFO] [stdout] test src/task/panic_spawner.rs - task::panic_spawner::PanicSpawner (line 9) ... ok
[INFO] [stdout] test src/task/panic_spawner.rs - task::panic_spawner::panic_spawner_mut (line 48) ... ok
[INFO] [stdout] test src/task/record_spawner.rs - task::record_spawner::RecordSpawner (line 9) ... ok
[INFO] [stdout] test src/task/panic_waker.rs - task::panic_waker::panic_waker (line 32) ... ok
[INFO] [stdout] test src/task/panic_waker.rs - task::panic_waker::panic_waker_ref (line 48) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 22 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "094f34289ac6c509d149a39e33899a1a2b8d2142b6e2199021d7e600a13d0a8a"`
[INFO] running `"docker" "rm" "-f" "094f34289ac6c509d149a39e33899a1a2b8d2142b6e2199021d7e600a13d0a8a"`
[INFO] [stdout] 094f34289ac6c509d149a39e33899a1a2b8d2142b6e2199021d7e600a13d0a8a