[INFO] fetching crate lock-free-stack 0.1.1...
[INFO] testing lock-free-stack-0.1.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate lock-free-stack 0.1.1 into /workspace/builds/worker-110/source
[INFO] validating manifest of crates.io crate lock-free-stack 0.1.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lock-free-stack 0.1.1
[INFO] finished tweaking crates.io crate lock-free-stack 0.1.1
[INFO] tweaked toml for crates.io crate lock-free-stack 0.1.1 written to /workspace/builds/worker-110/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51aecc002ecaffbb2b8915799c9ca437fd02687279e44c525fc0d21eee255383
[INFO] running `Command { std: "docker" "start" "-a" "51aecc002ecaffbb2b8915799c9ca437fd02687279e44c525fc0d21eee255383", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51aecc002ecaffbb2b8915799c9ca437fd02687279e44c525fc0d21eee255383", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51aecc002ecaffbb2b8915799c9ca437fd02687279e44c525fc0d21eee255383", kill_on_drop: false }`
[INFO] [stdout] 51aecc002ecaffbb2b8915799c9ca437fd02687279e44c525fc0d21eee255383
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 547f2ad3aee905d17edf4d67155909ea1b355a1b985a6621e0a71914eb864e0c
[INFO] running `Command { std: "docker" "start" "-a" "547f2ad3aee905d17edf4d67155909ea1b355a1b985a6621e0a71914eb864e0c", kill_on_drop: false }`
[INFO] [stderr]    Compiling lock-free-stack v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated associated function `std::sync::atomic::AtomicPtr::<T>::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/lock_free_stack.rs:52:41
[INFO] [stdout]    |
[INFO] [stdout] 52 |             let previous_top = self.top.compare_and_swap(
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::sync::atomic::AtomicPtr::<T>::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/lock_free_stack.rs:71:41
[INFO] [stdout]    |
[INFO] [stdout] 71 |             let previous_top = self.top.compare_and_swap(
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "547f2ad3aee905d17edf4d67155909ea1b355a1b985a6621e0a71914eb864e0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "547f2ad3aee905d17edf4d67155909ea1b355a1b985a6621e0a71914eb864e0c", kill_on_drop: false }`
[INFO] [stdout] 547f2ad3aee905d17edf4d67155909ea1b355a1b985a6621e0a71914eb864e0c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9c60c582b68cfecd16d793718d04fd9b85cabc6aec4774aab3b4fcd5f2fd8533
[INFO] running `Command { std: "docker" "start" "-a" "9c60c582b68cfecd16d793718d04fd9b85cabc6aec4774aab3b4fcd5f2fd8533", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] warning: use of deprecated associated function `std::sync::atomic::AtomicPtr::<T>::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/lock_free_stack.rs:52:41
[INFO] [stdout]    |
[INFO] [stdout] 52 |             let previous_top = self.top.compare_and_swap(
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::sync::atomic::AtomicPtr::<T>::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/lock_free_stack.rs:71:41
[INFO] [stdout]    |
[INFO] [stdout] 71 |             let previous_top = self.top.compare_and_swap(
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling lock-free-stack v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated associated function `std::sync::atomic::AtomicPtr::<T>::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/lock_free_stack.rs:52:41
[INFO] [stdout]    |
[INFO] [stdout] 52 |             let previous_top = self.top.compare_and_swap(
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::sync::atomic::AtomicPtr::<T>::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/lock_free_stack.rs:71:41
[INFO] [stdout]    |
[INFO] [stdout] 71 |             let previous_top = self.top.compare_and_swap(
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.84s
[INFO] running `Command { std: "docker" "inspect" "9c60c582b68cfecd16d793718d04fd9b85cabc6aec4774aab3b4fcd5f2fd8533", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c60c582b68cfecd16d793718d04fd9b85cabc6aec4774aab3b4fcd5f2fd8533", kill_on_drop: false }`
[INFO] [stdout] 9c60c582b68cfecd16d793718d04fd9b85cabc6aec4774aab3b4fcd5f2fd8533
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0516b9a601a40c3a5bab113240204d3124c98cc16cd3b9a49b92c9fdea0559b7
[INFO] running `Command { std: "docker" "start" "-a" "0516b9a601a40c3a5bab113240204d3124c98cc16cd3b9a49b92c9fdea0559b7", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated associated function `std::sync::atomic::AtomicPtr::<T>::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stderr]   --> src/lock_free_stack.rs:52:41
[INFO] [stderr]    |
[INFO] [stderr] 52 |             let previous_top = self.top.compare_and_swap(
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::sync::atomic::AtomicPtr::<T>::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stderr]   --> src/lock_free_stack.rs:71:41
[INFO] [stderr]    |
[INFO] [stderr] 71 |             let previous_top = self.top.compare_and_swap(
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `lock-free-stack` (lib) generated 2 warnings
[INFO] [stderr] warning: `lock-free-stack` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/lock_free_stack-d954e0966cd0b1be)
[INFO] [stdout] 
[INFO] [stderr]      Running tests/lock_free_stack.rs (/opt/rustwide/target/debug/deps/lock_free_stack-805838f12cba7d98)
[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] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test test_add_returns_one_size_when_adding_to_an_empty_stack ... ok
[INFO] [stdout] test test_remove_all_returns_a_one_item_iterator_for_stack_with_one_item ... ok
[INFO] [stdout] test test_remove_all_returns_an_empty_iterator_for_empty_stack ... ok
[INFO] [stdout] test test_add_returns_size_two_when_adding_to_a_stack_with_one_element ... ok
[INFO] [stdout] test test_size_returns_size_two_for_stack_with_two_elements ... ok
[INFO] [stdout] test test_size_returns_size_one_for_stack_with_one_element ... ok
[INFO] [stdout] test test_size_returns_zero_size_after_removing_all ... ok
[INFO] [stdout] test test_size_returns_zero_size_for_empty_stack ... ok
[INFO] [stdout] test test_add_in_threads_remove_in_current ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests lock-free-stack
[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" "0516b9a601a40c3a5bab113240204d3124c98cc16cd3b9a49b92c9fdea0559b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0516b9a601a40c3a5bab113240204d3124c98cc16cd3b9a49b92c9fdea0559b7", kill_on_drop: false }`
[INFO] [stdout] 0516b9a601a40c3a5bab113240204d3124c98cc16cd3b9a49b92c9fdea0559b7