[INFO] fetching crate nstack 0.9.0...
[INFO] testing nstack-0.9.0 against master#432e145bd5a974c5b6f4dd9b352891bd7502b69d for pr-87041
[INFO] extracting crate nstack 0.9.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate nstack 0.9.0 on toolchain 432e145bd5a974c5b6f4dd9b352891bd7502b69d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6/source/rust-toolchain
[INFO] started tweaking crates.io crate nstack 0.9.0
[INFO] finished tweaking crates.io crate nstack 0.9.0
[INFO] tweaked toml for crates.io crate nstack 0.9.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--no-deps" "--format-version=1", 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] 77b94efadbcbeaa64016aa7a9714b60ed66ebf1dd1efad1e27dc6775a88b60ab
[INFO] running `Command { std: "docker" "start" "-a" "77b94efadbcbeaa64016aa7a9714b60ed66ebf1dd1efad1e27dc6775a88b60ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77b94efadbcbeaa64016aa7a9714b60ed66ebf1dd1efad1e27dc6775a88b60ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77b94efadbcbeaa64016aa7a9714b60ed66ebf1dd1efad1e27dc6775a88b60ab", kill_on_drop: false }`
[INFO] [stdout] 77b94efadbcbeaa64016aa7a9714b60ed66ebf1dd1efad1e27dc6775a88b60ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6a5421f9ba2bbf8c9890754e6d064b2f2878d62bc8d0cc2aac71da3bc378f5f1
[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" "6a5421f9ba2bbf8c9890754e6d064b2f2878d62bc8d0cc2aac71da3bc378f5f1", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling blake2b_simd v0.3.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling derive_arbitrary v1.0.1
[INFO] [stderr]    Compiling arbitrary v1.0.1
[INFO] [stderr]    Compiling canonical v0.6.5
[INFO] [stderr]    Compiling canonical_derive v0.6.0
[INFO] [stderr]    Compiling microkelvin v0.9.1
[INFO] [stderr]    Compiling nstack v0.9.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.96s
[INFO] running `Command { std: "docker" "inspect" "6a5421f9ba2bbf8c9890754e6d064b2f2878d62bc8d0cc2aac71da3bc378f5f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a5421f9ba2bbf8c9890754e6d064b2f2878d62bc8d0cc2aac71da3bc378f5f1", kill_on_drop: false }`
[INFO] [stdout] 6a5421f9ba2bbf8c9890754e6d064b2f2878d62bc8d0cc2aac71da3bc378f5f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f308c04ca8a8a3b6458ccb4b248980b69923fd35dac8aeac3732326727e3d69a
[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" "f308c04ca8a8a3b6458ccb4b248980b69923fd35dac8aeac3732326727e3d69a", kill_on_drop: false }`
[INFO] [stderr]    Compiling nstack v0.9.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.78s
[INFO] running `Command { std: "docker" "inspect" "f308c04ca8a8a3b6458ccb4b248980b69923fd35dac8aeac3732326727e3d69a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f308c04ca8a8a3b6458ccb4b248980b69923fd35dac8aeac3732326727e3d69a", kill_on_drop: false }`
[INFO] [stdout] f308c04ca8a8a3b6458ccb4b248980b69923fd35dac8aeac3732326727e3d69a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen", 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] 9d90373bb76000b672a2a0b0e2085001a11d091a4e87be45eb1de9583a156dcf
[INFO] running `Command { std: "docker" "start" "-a" "9d90373bb76000b672a2a0b0e2085001a11d091a4e87be45eb1de9583a156dcf", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/nstack-d20497320e87a83a)
[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] [stderr]      Running tests/nstack.rs (/opt/rustwide/target/debug/deps/nstack-efb851914b865740)
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test branch_lengths ... ok
[INFO] [stdout] test double ... ok
[INFO] [stdout] test push_pop ... ok
[INFO] [stdout] test trivial ... ok
[INFO] [stdout] test nth ... ok
[INFO] [stdout] test multiple ... ok
[INFO] [stderr]      Running tests/persist.rs (/opt/rustwide/target/debug/deps/persist-1c8f1f6e37749aef)
[INFO] [stdout] test nth_mut ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.08s
[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] [stderr]    Doc-tests nstack
[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" "9d90373bb76000b672a2a0b0e2085001a11d091a4e87be45eb1de9583a156dcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d90373bb76000b672a2a0b0e2085001a11d091a4e87be45eb1de9583a156dcf", kill_on_drop: false }`
[INFO] [stdout] 9d90373bb76000b672a2a0b0e2085001a11d091a4e87be45eb1de9583a156dcf