[INFO] fetching crate bigraph 0.2.0...
[INFO] checking bigraph-0.2.0 against try#b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b for pr-82781
[INFO] extracting crate bigraph 0.2.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate bigraph 0.2.0 on toolchain b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bigraph 0.2.0
[INFO] finished tweaking crates.io crate bigraph 0.2.0
[INFO] tweaked toml for crates.io crate bigraph 0.2.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded strum v0.15.0
[INFO] [stderr]   Downloaded opaque_typedef_macros v0.0.5
[INFO] [stderr]   Downloaded opaque_typedef v0.0.5
[INFO] [stderr]   Downloaded strum_macros v0.15.0
[INFO] [stderr]   Downloaded traitsequence v0.2.0
[INFO] [stderr]   Downloaded traitgraph v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4c3fa997f2757ed830b9e6116d0ea88c9ab2ed1e6a84b29d75bed0250769bf16
[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" "4c3fa997f2757ed830b9e6116d0ea88c9ab2ed1e6a84b29d75bed0250769bf16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c3fa997f2757ed830b9e6116d0ea88c9ab2ed1e6a84b29d75bed0250769bf16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c3fa997f2757ed830b9e6116d0ea88c9ab2ed1e6a84b29d75bed0250769bf16", kill_on_drop: false }`
[INFO] [stdout] 4c3fa997f2757ed830b9e6116d0ea88c9ab2ed1e6a84b29d75bed0250769bf16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "check" "--frozen" "--all" "--all-targets" "--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] c00618bdbb6aef35c26a4d68a76cb13341ab69bc8205ef41124011266464b37d
[INFO] running `Command { std: "docker" "start" "-a" "c00618bdbb6aef35c26a4d68a76cb13341ab69bc8205ef41124011266464b37d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking bitvector v0.1.5
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling strum v0.15.0
[INFO] [stderr]     Checking traitsequence v0.2.0
[INFO] [stderr]     Checking opaque_typedef v0.0.5
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking petgraph v0.5.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking traitgraph v0.2.0
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/traitgraph-0.2.0/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]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/traitgraph-0.2.0/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] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "c00618bdbb6aef35c26a4d68a76cb13341ab69bc8205ef41124011266464b37d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c00618bdbb6aef35c26a4d68a76cb13341ab69bc8205ef41124011266464b37d", kill_on_drop: false }`
[INFO] [stdout] c00618bdbb6aef35c26a4d68a76cb13341ab69bc8205ef41124011266464b37d