[INFO] updating cached repository bpostlethwaite/r3bar
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/bpostlethwaite/r3bar
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/bpostlethwaite/r3bar" "work/ex/beta-1.37-6/sources/1.36.0/gh/bpostlethwaite/r3bar"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/bpostlethwaite/r3bar'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/bpostlethwaite/r3bar" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/bpostlethwaite/r3bar"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/bpostlethwaite/r3bar'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 12b10a0cb2d87c4464c6ce80efeb79d6e407c634
[INFO] sha for GitHub repo bpostlethwaite/r3bar: 12b10a0cb2d87c4464c6ce80efeb79d6e407c634
[INFO] validating manifest of bpostlethwaite/r3bar 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 bpostlethwaite/r3bar 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 bpostlethwaite/r3bar
[INFO] finished frobbing bpostlethwaite/r3bar
[INFO] frobbed toml for bpostlethwaite/r3bar written to work/ex/beta-1.37-6/sources/1.36.0/gh/bpostlethwaite/r3bar/Cargo.toml
[INFO] started frobbing bpostlethwaite/r3bar
[INFO] finished frobbing bpostlethwaite/r3bar
[INFO] frobbed toml for bpostlethwaite/r3bar written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/bpostlethwaite/r3bar/Cargo.toml
[INFO] crate bpostlethwaite/r3bar 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 bpostlethwaite/r3bar 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-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/bpostlethwaite/r3bar:/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] b43faf8fc8424fe478134c61fd8e72c250448b9c847d21ec59225e8aebeae517
[INFO] running `"docker" "start" "-a" "b43faf8fc8424fe478134c61fd8e72c250448b9c847d21ec59225e8aebeae517"`
[INFO] [stderr]    Compiling libc v0.2.21
[INFO] [stderr]    Compiling siphasher v0.2.1
[INFO] [stderr]    Compiling itoa v0.3.1
[INFO] [stderr]    Compiling serde v0.9.10
[INFO] [stderr]    Compiling num-traits v0.1.37
[INFO] [stderr]    Compiling dtoa v0.4.1
[INFO] [stderr]    Compiling bitflags v0.7.0
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]    Compiling lazy_static v0.2.2
[INFO] [stderr]    Compiling pkg-config v0.3.9
[INFO] [stderr]    Compiling gcc v0.3.43
[INFO] [stderr]    Compiling khronos_api v1.0.0
[INFO] [stderr]    Compiling rustc-serialize v0.3.22
[INFO] [stderr]    Compiling log v0.3.6
[INFO] [stderr]    Compiling byteorder v1.0.0
[INFO] [stderr]    Compiling odds v0.2.25
[INFO] [stderr]    Compiling backtrace v0.2.3
[INFO] [stderr]    Compiling adler32 v0.3.0
[INFO] [stderr]    Compiling fixedbitset v0.1.5
[INFO] [stderr]    Compiling rustc-demangle v0.1.4
[INFO] [stderr]    Compiling byteorder v0.4.2
[INFO] [stderr]    Compiling piston-float v0.3.0
[INFO] [stderr]    Compiling inflate v0.2.0
[INFO] [stderr]    Compiling lzw v0.10.0
[INFO] [stderr]    Compiling bitflags v0.8.2
[INFO] [stderr]    Compiling linked-hash-map v0.0.10
[INFO] [stderr]    Compiling libc v0.1.12
[INFO] [stderr]    Compiling color_quant v1.0.0
[INFO] [stderr]    Compiling debug-builders v0.1.0
[INFO] [stderr]    Compiling smallvec v0.1.8
[INFO] [stderr]    Compiling fnv v1.0.5
[INFO] [stderr]    Compiling scoped_threadpool v0.1.7
[INFO] [stderr]    Compiling byteorder v0.3.13
[INFO] [stderr]    Compiling serde v1.0.2
[INFO] [stderr]    Compiling getopts v0.2.14
[INFO] [stderr]    Compiling xml-rs v0.3.6
[INFO] [stderr]    Compiling phf_shared v0.7.21
[INFO] [stderr] warning[E0503]: cannot use `state` because it was mutably borrowed
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/getopts-0.2.14/src/lib.rs:1008:33
[INFO] [stderr]      |
[INFO] [stderr] 955  |     let mut machine = |cont: &mut bool, (i, c): (usize, char)| {
[INFO] [stderr]      |                       ---------------------------------------- borrow of `state` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 959  |         state = match (state, whitespace, limit) {
[INFO] [stderr]      |         ----- borrow occurs due to use of `state` in closure
[INFO] [stderr] ...
[INFO] [stderr] 1008 |     while cont && match state { B | C => true, A => false } {
[INFO] [stderr]      |                                 ^ use of borrowed `state`
[INFO] [stderr] 1009 |         machine(&mut cont, (fake_i, ' '));
[INFO] [stderr]      |         ------- borrow later used here
[INFO] [stderr]      |
[INFO] [stderr]      = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]      = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr] 
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling shared_library v0.1.5
[INFO] [stderr]    Compiling num_cpus v1.3.0
[INFO] [stderr]    Compiling thread-id v3.0.0
[INFO] [stderr]    Compiling memchr v1.0.1
[INFO] [stderr]    Compiling time v0.1.36
[INFO] [stderr]    Compiling num-integer v0.1.33
[INFO] [stderr]    Compiling enum_primitive v0.1.1
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling unix_socket v0.5.0
[INFO] [stderr]    Compiling deflate v0.7.4
[INFO] [stderr]    Compiling x11-dl v2.12.0
[INFO] [stderr]    Compiling petgraph v0.2.9
[INFO] [stderr]    Compiling piston-viewport v0.3.0
[INFO] [stderr]    Compiling stb_truetype v0.2.0
[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 nodrop v0.1.9
[INFO] [stderr]    Compiling backtrace-sys v0.1.10
[INFO] [stderr]    Compiling unix_socket v0.4.6
[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" "b43faf8fc8424fe478134c61fd8e72c250448b9c847d21ec59225e8aebeae517"`
[INFO] running `"docker" "rm" "-f" "b43faf8fc8424fe478134c61fd8e72c250448b9c847d21ec59225e8aebeae517"`
[INFO] [stdout] b43faf8fc8424fe478134c61fd8e72c250448b9c847d21ec59225e8aebeae517