[INFO] fetching crate traitgraph 0.2.0...
[INFO] testing traitgraph-0.2.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate traitgraph 0.2.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate traitgraph 0.2.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate traitgraph 0.2.0
[INFO] finished tweaking crates.io crate traitgraph 0.2.0
[INFO] tweaked toml for crates.io crate traitgraph 0.2.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d61969dd3d4360162ceb5a41d91a4157bdde918b85531e3ebe25b8ed1275f880
[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" "d61969dd3d4360162ceb5a41d91a4157bdde918b85531e3ebe25b8ed1275f880", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d61969dd3d4360162ceb5a41d91a4157bdde918b85531e3ebe25b8ed1275f880", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d61969dd3d4360162ceb5a41d91a4157bdde918b85531e3ebe25b8ed1275f880", kill_on_drop: false }`
[INFO] [stdout] d61969dd3d4360162ceb5a41d91a4157bdde918b85531e3ebe25b8ed1275f880
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7dc6db3b4e05c03b0a4e289e759f1cc8172c1298c9239ff20c316ad74021b4f3
[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" "7dc6db3b4e05c03b0a4e289e759f1cc8172c1298c9239ff20c316ad74021b4f3", kill_on_drop: false }`
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[INFO] [stderr]    Compiling bitvector v0.1.5
[INFO] [stderr]    Compiling traitsequence v0.2.0
[INFO] [stderr]    Compiling petgraph v0.5.1
[INFO] [stderr]    Compiling traitgraph v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/algo/traversal/mod.rs:189:39
[INFO] [stdout]     |
[INFO] [stdout] 189 |                     if *rank_entry == None.into() {
[INFO] [stdout]     |                                       ^^^^ cannot infer type for type parameter `T` declared on the enum `Option`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/algo/traversal/mod.rs:296:38
[INFO] [stdout]     |
[INFO] [stdout] 296 |             } else if *rank_entry == None.into() {
[INFO] [stdout]     |                                      ^^^^ cannot infer type for type parameter `T` declared on the enum `Option`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `traitgraph`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "7dc6db3b4e05c03b0a4e289e759f1cc8172c1298c9239ff20c316ad74021b4f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7dc6db3b4e05c03b0a4e289e759f1cc8172c1298c9239ff20c316ad74021b4f3", kill_on_drop: false }`
[INFO] [stdout] 7dc6db3b4e05c03b0a4e289e759f1cc8172c1298c9239ff20c316ad74021b4f3