[INFO] fetching crate nyar-collatz 0.1.0...
[INFO] testing nyar-collatz-0.1.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate nyar-collatz 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate nyar-collatz 0.1.0 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 nyar-collatz 0.1.0
[INFO] finished tweaking crates.io crate nyar-collatz 0.1.0
[INFO] tweaked toml for crates.io crate nyar-collatz 0.1.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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-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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "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] fb0543b134e9cb7e3dd9362482645dc16751b28aa56e1ca6c62f383832c17554
[INFO] running `Command { std: "docker" "start" "-a" "fb0543b134e9cb7e3dd9362482645dc16751b28aa56e1ca6c62f383832c17554", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb0543b134e9cb7e3dd9362482645dc16751b28aa56e1ca6c62f383832c17554", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb0543b134e9cb7e3dd9362482645dc16751b28aa56e1ca6c62f383832c17554", kill_on_drop: false }`
[INFO] [stdout] fb0543b134e9cb7e3dd9362482645dc16751b28aa56e1ca6c62f383832c17554
[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=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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "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] 652ed470c93a14ca7a3b937ca5a540e8d977f6cdb02f7b5ece50cdb0bbda34d0
[INFO] running `Command { std: "docker" "start" "-a" "652ed470c93a14ca7a3b937ca5a540e8d977f6cdb02f7b5ece50cdb0bbda34d0", kill_on_drop: false }`
[INFO] [stderr]    Compiling nyar-collatz v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.16s
[INFO] running `Command { std: "docker" "inspect" "652ed470c93a14ca7a3b937ca5a540e8d977f6cdb02f7b5ece50cdb0bbda34d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "652ed470c93a14ca7a3b937ca5a540e8d977f6cdb02f7b5ece50cdb0bbda34d0", kill_on_drop: false }`
[INFO] [stdout] 652ed470c93a14ca7a3b937ca5a540e8d977f6cdb02f7b5ece50cdb0bbda34d0
[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=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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 08ca2f253b486e7eaa008ae5bc8afd1f9ed1a463ff1bca46f3d0e9730af5f2c9
[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" "08ca2f253b486e7eaa008ae5bc8afd1f9ed1a463ff1bca46f3d0e9730af5f2c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling nyar-collatz v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.20s
[INFO] running `Command { std: "docker" "inspect" "08ca2f253b486e7eaa008ae5bc8afd1f9ed1a463ff1bca46f3d0e9730af5f2c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08ca2f253b486e7eaa008ae5bc8afd1f9ed1a463ff1bca46f3d0e9730af5f2c9", kill_on_drop: false }`
[INFO] [stdout] 08ca2f253b486e7eaa008ae5bc8afd1f9ed1a463ff1bca46f3d0e9730af5f2c9
[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=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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] af402e6dc4a4d007fe6bbb1f006bdfce195f67e2b757ebfe0d676d36c7e2f4b3
[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" "af402e6dc4a4d007fe6bbb1f006bdfce195f67e2b757ebfe0d676d36c7e2f4b3", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/collatz-17f2c44633576472
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test collatz64::test::test_longest_collatz ... ok
[INFO] [stdout] test collatz64::test::test_longest_collatz_memo ... ok
[INFO] [stdout] test collatz64::test::collatz_13 ... ok
[INFO] [stdout] test collatz::test::collatz_13 ... ok
[INFO] [stdout] test collatz::test::collatz_0 ... ok
[INFO] [stderr]    Doc-tests collatz
[INFO] [stdout] test collatz64::test::collatz_0 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] error[E0659]: `collatz` is ambiguous (name vs any other name during import resolution)
[INFO] [stderr]  --> /opt/rustwide/workdir/src/lib.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub use collatz::Collatz;
[INFO] [stderr]   |         ^^^^^^^ ambiguous name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `collatz` could refer to a crate passed with `--extern`
[INFO] [stderr]   = help: use `::collatz` to refer to this crate unambiguously
[INFO] [stderr] note: `collatz` could also refer to the module defined here
[INFO] [stderr]  --> /opt/rustwide/workdir/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub mod collatz;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr]   = help: use `crate::collatz` to refer to this module unambiguously
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0659`.
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "af402e6dc4a4d007fe6bbb1f006bdfce195f67e2b757ebfe0d676d36c7e2f4b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af402e6dc4a4d007fe6bbb1f006bdfce195f67e2b757ebfe0d676d36c7e2f4b3", kill_on_drop: false }`
[INFO] [stdout] af402e6dc4a4d007fe6bbb1f006bdfce195f67e2b757ebfe0d676d36c7e2f4b3