[INFO] fetching crate differential-dataflow 0.11.0...
[INFO] testing differential-dataflow-0.11.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate differential-dataflow 0.11.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate differential-dataflow 0.11.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate differential-dataflow 0.11.0
[INFO] finished tweaking crates.io crate differential-dataflow 0.11.0
[INFO] tweaked toml for crates.io crate differential-dataflow 0.11.0 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate differential-dataflow 0.11.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d4edb4168800edcbe0e76026a89f2d8ef918307c608d83ca064c926a220b2f8f
[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" "d4edb4168800edcbe0e76026a89f2d8ef918307c608d83ca064c926a220b2f8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d4edb4168800edcbe0e76026a89f2d8ef918307c608d83ca064c926a220b2f8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4edb4168800edcbe0e76026a89f2d8ef918307c608d83ca064c926a220b2f8f", kill_on_drop: false }`
[INFO] [stdout] d4edb4168800edcbe0e76026a89f2d8ef918307c608d83ca064c926a220b2f8f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 52e49ca62f5c6b1f2cbf35566192974c9fdca9ae39d37798c72641c4424b2cc0
[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" "52e49ca62f5c6b1f2cbf35566192974c9fdca9ae39d37798c72641c4424b2cc0", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]    Compiling serde v1.0.102
[INFO] [stderr]    Compiling timely_bytes v0.11.0
[INFO] [stderr]    Compiling timely_logging v0.11.1
[INFO] [stderr]    Compiling abomonation v0.7.3
[INFO] [stderr]    Compiling timely_sort v0.1.6
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling synstructure v0.12.1
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]    Compiling abomonation_derive v0.5.0
[INFO] [stderr]    Compiling timely_communication v0.11.1
[INFO] [stderr]    Compiling timely v0.11.1
[INFO] [stderr]    Compiling differential-dataflow v0.11.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stdout]    --> src/operators/arrange/arrangement.rs:397:19
[INFO] [stdout]     |
[INFO] [stdout] 397 |                 ].into_iter().cloned().filter_map(|t| t).min();
[INFO] [stdout]     |                   ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 45.21s
[INFO] running `Command { std: "docker" "inspect" "52e49ca62f5c6b1f2cbf35566192974c9fdca9ae39d37798c72641c4424b2cc0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52e49ca62f5c6b1f2cbf35566192974c9fdca9ae39d37798c72641c4424b2cc0", kill_on_drop: false }`
[INFO] [stdout] 52e49ca62f5c6b1f2cbf35566192974c9fdca9ae39d37798c72641c4424b2cc0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f61a6490887f00f31ef54ef9e88d74e2a70a754ae30f9d9ea03b78dd8a86f93
[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" "5f61a6490887f00f31ef54ef9e88d74e2a70a754ae30f9d9ea03b78dd8a86f93", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling indexmap v1.3.0
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stdout] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stdout]    --> src/operators/arrange/arrangement.rs:397:19
[INFO] [stdout]     |
[INFO] [stdout] 397 |                 ].into_iter().cloned().filter_map(|t| t).min();
[INFO] [stdout]     |                   ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling serde_json v1.0.41
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling memmap v0.5.2
[INFO] [stderr]    Compiling graph_map v0.1.0
[INFO] [stderr]    Compiling differential-dataflow v0.11.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `differential_dataflow::operators::Count`
[INFO] [stdout]  --> examples/hello.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use differential_dataflow::operators::Count;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `differential-dataflow`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name arrange examples/arrange.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 -C metadata=bb496f040ba54943 -C extra-filename=-bb496f040ba54943 --out-dir /opt/rustwide/target/debug/examples -L dependency=/opt/rustwide/target/debug/deps --extern abomonation=/opt/rustwide/target/debug/deps/libabomonation-e085526759a07067.rlib --extern abomonation_derive=/opt/rustwide/target/debug/deps/libabomonation_derive-72854a0146946132.so --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-76ff728e7fb88045.rlib --extern differential_dataflow=/opt/rustwide/target/debug/deps/libdifferential_dataflow-a0149413ba104994.rlib --extern fnv=/opt/rustwide/target/debug/deps/libfnv-40b1e5d34b306915.rlib --extern graph_map=/opt/rustwide/target/debug/deps/libgraph_map-9efe43e6b3ed6b1f.rlib --extern indexmap=/opt/rustwide/target/debug/deps/libindexmap-2d5bd68869b6538e.rlib --extern itertools=/opt/rustwide/target/debug/deps/libitertools-ba712944df9705ae.rlib --extern rand=/opt/rustwide/target/debug/deps/librand-b3803ccc26d6c1fa.rlib --extern serde=/opt/rustwide/target/debug/deps/libserde-72d797aad0d084ce.rlib --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-7bea134f5e6d1d79.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-f86033f10dc6b5d7.rlib --extern timely=/opt/rustwide/target/debug/deps/libtimely-d7fbcb747dcd3f39.rlib --extern timely_sort=/opt/rustwide/target/debug/deps/libtimely_sort-d68997c9c3365762.rlib --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "5f61a6490887f00f31ef54ef9e88d74e2a70a754ae30f9d9ea03b78dd8a86f93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f61a6490887f00f31ef54ef9e88d74e2a70a754ae30f9d9ea03b78dd8a86f93", kill_on_drop: false }`
[INFO] [stdout] 5f61a6490887f00f31ef54ef9e88d74e2a70a754ae30f9d9ea03b78dd8a86f93