[INFO] updating cached repository mrobakowski/mulperc
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mrobakowski/mulperc
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mrobakowski/mulperc" "work/ex/beta-1.37-6/sources/1.36.0/gh/mrobakowski/mulperc"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/mrobakowski/mulperc'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mrobakowski/mulperc" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mrobakowski/mulperc"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mrobakowski/mulperc'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 38979108f3ca8ebc616f34fb63263642c095d760
[INFO] sha for GitHub repo mrobakowski/mulperc: 38979108f3ca8ebc616f34fb63263642c095d760
[INFO] validating manifest of mrobakowski/mulperc on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mrobakowski/mulperc on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mrobakowski/mulperc
[INFO] finished frobbing mrobakowski/mulperc
[INFO] frobbed toml for mrobakowski/mulperc written to work/ex/beta-1.37-6/sources/1.36.0/gh/mrobakowski/mulperc/Cargo.toml
[INFO] started frobbing mrobakowski/mulperc
[INFO] finished frobbing mrobakowski/mulperc
[INFO] frobbed toml for mrobakowski/mulperc written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mrobakowski/mulperc/Cargo.toml
[INFO] crate mrobakowski/mulperc already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing mrobakowski/mulperc against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/mrobakowski/mulperc:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 12b7bd25a5b1f2846a66e7114412c737960895c625fa10a5e1c30e15efb75966
[INFO] running `"docker" "start" "-a" "12b7bd25a5b1f2846a66e7114412c737960895c625fa10a5e1c30e15efb75966"`
[INFO] [stderr]    Compiling phf_shared v0.7.20
[INFO] [stderr]    Compiling serde v0.8.19
[INFO] [stderr]    Compiling khronos_api v1.0.0
[INFO] [stderr]    Compiling quote v0.3.8
[INFO] [stderr]    Compiling fixedbitset v0.1.5
[INFO] [stderr]    Compiling smallvec v0.1.8
[INFO] [stderr]    Compiling term_size v0.2.1
[INFO] [stderr]    Compiling xml-rs v0.3.4
[INFO] [stderr]    Compiling x11-dl v2.11.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.5
[INFO] [stderr]    Compiling shared_library v0.1.5
[INFO] [stderr]    Compiling nfd v0.0.4
[INFO] [stderr]    Compiling num-complex v0.1.35
[INFO] [stderr]    Compiling nodrop v0.1.8
[INFO] [stderr]    Compiling stb_truetype v0.2.0
[INFO] [stderr]    Compiling clap v2.19.0
[INFO] [stderr]    Compiling tempfile v2.1.4
[INFO] [stderr]    Compiling phf_generator v0.7.20
[INFO] [stderr]    Compiling phf v0.7.20
[INFO] [stderr]    Compiling petgraph v0.2.9
[INFO] [stderr]    Compiling syn v0.10.3
[INFO] [stderr]    Compiling pistoncore-input v0.14.0
[INFO] [stderr]    Compiling arrayvec v0.3.20
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.2.9/src/graph.rs:421:17
[INFO] [stderr]     |
[INFO] [stderr] 421 |         assert!(Ix::max().index() == !0 || NodeIndex::end() != node_idx);
[INFO] [stderr]     |                 ^^^^^^^ multiple `max` found
[INFO] [stderr]     |
[INFO] [stderr] note: candidate #1 is defined in the trait `graph::IndexType`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.2.9/src/graph.rs:31:5
[INFO] [stderr]     |
[INFO] [stderr] 31  |     fn max() -> Self;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     = help: to disambiguate the method call, write `graph::IndexType::max(...)` instead
[INFO] [stderr] note: candidate #2 is defined in the trait `std::cmp::Ord`
[INFO] [stderr]     = help: to disambiguate the method call, write `std::cmp::Ord::max(...)` instead
[INFO] [stderr] 
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.2.9/src/graph.rs:458:17
[INFO] [stderr]     |
[INFO] [stderr] 458 |         assert!(Ix::max().index() == !0 || EdgeIndex::end() != edge_idx);
[INFO] [stderr]     |                 ^^^^^^^ multiple `max` found
[INFO] [stderr]     |
[INFO] [stderr] note: candidate #1 is defined in the trait `graph::IndexType`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.2.9/src/graph.rs:31:5
[INFO] [stderr]     |
[INFO] [stderr] 31  |     fn max() -> Self;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     = help: to disambiguate the method call, write `graph::IndexType::max(...)` instead
[INFO] [stderr] note: candidate #2 is defined in the trait `std::cmp::Ord`
[INFO] [stderr]     = help: to disambiguate the method call, write `std::cmp::Ord::max(...)` instead
[INFO] [stderr] 
[INFO] [stderr]    Compiling osmesa-sys v0.1.2
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0034`.
[INFO] [stderr] error: Could not compile `petgraph`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "12b7bd25a5b1f2846a66e7114412c737960895c625fa10a5e1c30e15efb75966"`
[INFO] running `"docker" "rm" "-f" "12b7bd25a5b1f2846a66e7114412c737960895c625fa10a5e1c30e15efb75966"`
[INFO] [stdout] 12b7bd25a5b1f2846a66e7114412c737960895c625fa10a5e1c30e15efb75966