[INFO] fetching crate persistent_stack 0.1.1...
[INFO] testing persistent_stack-0.1.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate persistent_stack 0.1.1 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate persistent_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 persistent_stack 0.1.1
[INFO] finished tweaking crates.io crate persistent_stack 0.1.1
[INFO] tweaked toml for crates.io crate persistent_stack 0.1.1 written to /workspace/builds/worker-11/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-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] 6201c534a6fcab4515615d06f41e84900fce67cbd1781e69928486c4b0cca253
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6201c534a6fcab4515615d06f41e84900fce67cbd1781e69928486c4b0cca253", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6201c534a6fcab4515615d06f41e84900fce67cbd1781e69928486c4b0cca253", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6201c534a6fcab4515615d06f41e84900fce67cbd1781e69928486c4b0cca253", kill_on_drop: false }`
[INFO] [stdout] 6201c534a6fcab4515615d06f41e84900fce67cbd1781e69928486c4b0cca253
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5a7e6251938f802da5a3a0e6ea192f45dcc7745643feebd90345135d982e3247
[INFO] running `Command { std: "docker" "start" "-a" "5a7e6251938f802da5a3a0e6ea192f45dcc7745643feebd90345135d982e3247", kill_on_drop: false }`
[INFO] [stderr]    Compiling persistent_stack v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.08s
[INFO] running `Command { std: "docker" "inspect" "5a7e6251938f802da5a3a0e6ea192f45dcc7745643feebd90345135d982e3247", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a7e6251938f802da5a3a0e6ea192f45dcc7745643feebd90345135d982e3247", kill_on_drop: false }`
[INFO] [stdout] 5a7e6251938f802da5a3a0e6ea192f45dcc7745643feebd90345135d982e3247
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f9b30ff5d09f8356dd0b8de4d2332b78a313abeee6aaf55282685bf183456da4
[INFO] running `Command { std: "docker" "start" "-a" "f9b30ff5d09f8356dd0b8de4d2332b78a313abeee6aaf55282685bf183456da4", kill_on_drop: false }`
[INFO] [stderr]    Compiling persistent_stack v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `Command { std: "docker" "inspect" "f9b30ff5d09f8356dd0b8de4d2332b78a313abeee6aaf55282685bf183456da4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9b30ff5d09f8356dd0b8de4d2332b78a313abeee6aaf55282685bf183456da4", kill_on_drop: false }`
[INFO] [stdout] f9b30ff5d09f8356dd0b8de4d2332b78a313abeee6aaf55282685bf183456da4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] f5fa90c73a2d3a744b6bbb4355f0c4fff35724da8e26fe300598c1cb8c86cc19
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f5fa90c73a2d3a744b6bbb4355f0c4fff35724da8e26fe300598c1cb8c86cc19", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/persistent_stack-cfd79ac62e69b477)
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::test_persistent_stack ... ok
[INFO] [stderr]    Doc-tests persistent_stack
[INFO] [stdout] test tests::readme_example ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test src/lib.rs - PersistentStack<T>::new (line 57) ... ok
[INFO] [stdout] test src/lib.rs - PersistentStack<T>::iter (line 124) ... ok
[INFO] [stdout] test src/lib.rs - PersistentStack<T>::push (line 69) ... ok
[INFO] [stdout] test src/lib.rs - PersistentStack (line 15) ... ok
[INFO] [stdout] test src/lib.rs - PersistentStack<T>::pop (line 95) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.39s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f5fa90c73a2d3a744b6bbb4355f0c4fff35724da8e26fe300598c1cb8c86cc19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5fa90c73a2d3a744b6bbb4355f0c4fff35724da8e26fe300598c1cb8c86cc19", kill_on_drop: false }`
[INFO] [stdout] f5fa90c73a2d3a744b6bbb4355f0c4fff35724da8e26fe300598c1cb8c86cc19