[INFO] updating cached repository emallson/bct.rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/emallson/bct.rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/emallson/bct.rs" "work/ex/beta-1.38-1/sources/1.37.0/gh/emallson/bct.rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/emallson/bct.rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/emallson/bct.rs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/emallson/bct.rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/emallson/bct.rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0d4dfa531f1e54a7dc29927aa3ff5ca5b48702e6
[INFO] sha for GitHub repo emallson/bct.rs: 0d4dfa531f1e54a7dc29927aa3ff5ca5b48702e6
[INFO] validating manifest of emallson/bct.rs on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of emallson/bct.rs on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing emallson/bct.rs
[INFO] finished frobbing emallson/bct.rs
[INFO] frobbed toml for emallson/bct.rs written to work/ex/beta-1.38-1/sources/1.37.0/gh/emallson/bct.rs/Cargo.toml
[INFO] started frobbing emallson/bct.rs
[INFO] finished frobbing emallson/bct.rs
[INFO] frobbed toml for emallson/bct.rs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/emallson/bct.rs/Cargo.toml
[INFO] crate emallson/bct.rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing emallson/bct.rs against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/emallson/bct.rs:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] e8b6463e3a6047ed8097dea0e4d0c554d9fd6143a5626217af32c3447ad5d584
[INFO] running `"docker" "start" "-a" "e8b6463e3a6047ed8097dea0e4d0c554d9fd6143a5626217af32c3447ad5d584"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling libc v0.2.34
[INFO] [stderr]    Compiling cc v1.0.3
[INFO] [stderr]    Compiling regex-syntax v0.3.9
[INFO] [stderr]    Compiling utf8-ranges v0.1.3
[INFO] [stderr]    Compiling log v0.3.8
[INFO] [stderr]    Compiling byteorder v0.4.2
[INFO] [stderr]    Compiling num-traits v0.1.41
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling rayon-core v1.3.0
[INFO] [stderr]    Compiling either v1.4.0
[INFO] [stderr]    Compiling crossbeam v0.2.10
[INFO] [stderr]    Compiling cfg-if v0.1.2
[INFO] [stderr]    Compiling slog v2.0.12
[INFO] [stderr]    Compiling rustc-demangle v0.1.5
[INFO] [stderr]    Compiling fixedbitset v0.1.8
[INFO] [stderr]    Compiling slog v1.7.1
[INFO] [stderr]    Compiling bit-vec v0.4.4
[INFO] [stderr]    Compiling ordermap v0.3.2
[INFO] [stderr]    Compiling utf8-ranges v1.0.0
[INFO] [stderr]    Compiling serde v0.9.15
[INFO] [stderr]    Compiling itoa v0.1.1
[INFO] [stderr]    Compiling dtoa v0.4.2
[INFO] [stderr]    Compiling regex-syntax v0.4.1
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling serde v0.8.23
[INFO] [stderr]    Compiling dtoa v0.2.2
[INFO] [stderr]    Compiling strsim v0.5.2
[INFO] [stderr]    Compiling itoa v0.3.4
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling strsim v0.6.0
[INFO] [stderr]    Compiling byteorder v1.2.1
[INFO] [stderr]    Compiling serde v1.0.23
[INFO] [stderr]    Compiling as_num v0.2.3
[INFO] [stderr]    Compiling capnp v0.7.5
[INFO] [stderr] warning[E0502]: cannot borrow `*reff` as immutable because it is also borrowed as mutable
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/capnp-0.7.5/src/private/layout.rs:643:47
[INFO] [stderr]     |
[INFO] [stderr] 643 |         let ptr = try!(follow_fars(&mut reff, (*reff).target(), &mut segment));
[INFO] [stderr]     |                        ----------- ---------  ^^^^^^^ immutable borrow occurs here
[INFO] [stderr]     |                        |           |
[INFO] [stderr]     |                        |           mutable borrow occurs here
[INFO] [stderr]     |                        mutable borrow later used by call
[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]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling colored v1.6.0
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling rand v0.3.18
[INFO] [stderr]    Compiling num_cpus v1.7.0
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling time v0.1.38
[INFO] [stderr]    Compiling isatty v0.1.6
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling coco v0.1.1
[INFO] [stderr]    Compiling num-integer v0.1.35
[INFO] [stderr]    Compiling bit-set v0.4.0
[INFO] [stderr]    Compiling slog-scope v4.0.1
[INFO] [stderr]    Compiling serde_json v0.8.6
[INFO] [stderr]    Compiling slog-serde v1.0.0-alpha9
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling thread_local v0.3.4
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling aho-corasick v0.5.3
[INFO] [stderr]    Compiling serde_json v0.9.10
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]    Compiling statrs v0.8.0
[INFO] [stderr]    Compiling rand-mersenne-twister v0.2.0 (https://github.com/emallson/rust-mersenne-twister.git#2e01e0ee)
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]    Compiling num-iter v0.1.34
[INFO] [stderr]    Compiling capnpc v0.7.5
[INFO] [stderr]    Compiling serde_json v1.0.7
[INFO] [stderr]    Compiling bincode v0.8.0
[INFO] [stderr]    Compiling slog-stdlog v3.0.2
[INFO] [stderr]    Compiling slog-extra v0.1.2
[INFO] [stderr]    Compiling num v0.1.41
[INFO] [stderr]    Compiling regex v0.2.3
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling chrono v0.2.25
[INFO] [stderr]    Compiling rayon v0.8.2
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr]    Compiling slog-stream v1.2.1
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr]    Compiling slog-term v1.5.0
[INFO] [stderr]    Compiling slog-json v1.2.1
[INFO] [stderr]    Compiling backtrace v0.3.4
[INFO] [stderr]    Compiling serde_derive_internals v0.17.0
[INFO] [stderr]    Compiling serde_codegen_internals v0.14.2
[INFO] [stderr]    Compiling avarice-derive v0.1.0 (https://github.com/emallson/avarice.rs.git#2ebfeedd)
[INFO] [stderr]    Compiling error-chain v0.10.0
[INFO] [stderr]    Compiling capngraph v0.3.0 (https://github.com/emallson/capngraph.git#997b39ef)
[INFO] [stderr]    Compiling env_logger v0.3.5
[INFO] [stderr]    Compiling docopt v0.6.86
[INFO] [stderr]    Compiling serde_derive v0.9.15
[INFO] [stderr]    Compiling serde_derive v1.0.23
[INFO] [stderr]    Compiling quickcheck v0.4.1
[INFO] [stderr]    Compiling petgraph v0.4.10
[INFO] [stderr]    Compiling setlike v0.1.0 (https://github.com/emallson/setlike.git#51cddb9b)
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.10/src/graph_impl/stable_graph/mod.rs:1173:19
[INFO] [stderr]      |
[INFO] [stderr] 1173 |         self.iter.find_map(|(i, node)| {
[INFO] [stderr]      |                   ^^^^^^^^ multiple `find_map` found
[INFO] [stderr]      |
[INFO] [stderr] note: candidate #1 is defined in an impl of the trait `iter_utils::IterUtilsExt` for the type `_`
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.10/src/iter_utils.rs:5:5
[INFO] [stderr]      |
[INFO] [stderr] 5    | /     fn find_map<F, R>(&mut self, mut f: F) -> Option<R>
[INFO] [stderr] 6    | |         where F: FnMut(Self::Item) -> Option<R>
[INFO] [stderr] 7    | |     {
[INFO] [stderr] 8    | |         while let Some(elt) = self.next() {
[INFO] [stderr] ...    |
[INFO] [stderr] 13   | |         None
[INFO] [stderr] 14   | |     }
[INFO] [stderr]      | |_____^
[INFO] [stderr]      = note: candidate #2 is defined in an impl of the trait `std::iter::Iterator` for the type `std::iter::Enumerate<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.10/src/graph_impl/stable_graph/mod.rs:1365:19
[INFO] [stderr]      |
[INFO] [stderr] 1365 |         self.iter.find_map(|(i, edge)|
[INFO] [stderr]      |                   ^^^^^^^^ multiple `find_map` found
[INFO] [stderr]      |
[INFO] [stderr] note: candidate #1 is defined in an impl of the trait `iter_utils::IterUtilsExt` for the type `_`
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.10/src/iter_utils.rs:5:5
[INFO] [stderr]      |
[INFO] [stderr] 5    | /     fn find_map<F, R>(&mut self, mut f: F) -> Option<R>
[INFO] [stderr] 6    | |         where F: FnMut(Self::Item) -> Option<R>
[INFO] [stderr] 7    | |     {
[INFO] [stderr] 8    | |         while let Some(elt) = self.next() {
[INFO] [stderr] ...    |
[INFO] [stderr] 13   | |         None
[INFO] [stderr] 14   | |     }
[INFO] [stderr]      | |_____^
[INFO] [stderr]      = note: candidate #2 is defined in an impl of the trait `std::iter::Iterator` for the type `std::iter::Enumerate<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.10/src/graph_impl/stable_graph/mod.rs:1529:19
[INFO] [stderr]      |
[INFO] [stderr] 1529 |         self.iter.find_map(|(i, node)| {
[INFO] [stderr]      |                   ^^^^^^^^ multiple `find_map` found
[INFO] [stderr]      |
[INFO] [stderr] note: candidate #1 is defined in an impl of the trait `iter_utils::IterUtilsExt` for the type `_`
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.10/src/iter_utils.rs:5:5
[INFO] [stderr]      |
[INFO] [stderr] 5    | /     fn find_map<F, R>(&mut self, mut f: F) -> Option<R>
[INFO] [stderr] 6    | |         where F: FnMut(Self::Item) -> Option<R>
[INFO] [stderr] 7    | |     {
[INFO] [stderr] 8    | |         while let Some(elt) = self.next() {
[INFO] [stderr] ...    |
[INFO] [stderr] 13   | |         None
[INFO] [stderr] 14   | |     }
[INFO] [stderr]      | |_____^
[INFO] [stderr]      = note: candidate #2 is defined in an impl of the trait `std::iter::Iterator` for the type `std::iter::Enumerate<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.10/src/graph_impl/stable_graph/mod.rs:1575:19
[INFO] [stderr]      |
[INFO] [stderr] 1575 |         self.iter.find_map(|(i, node)| {
[INFO] [stderr]      |                   ^^^^^^^^ multiple `find_map` found
[INFO] [stderr]      |
[INFO] [stderr] note: candidate #1 is defined in an impl of the trait `iter_utils::IterUtilsExt` for the type `_`
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.10/src/iter_utils.rs:5:5
[INFO] [stderr]      |
[INFO] [stderr] 5    | /     fn find_map<F, R>(&mut self, mut f: F) -> Option<R>
[INFO] [stderr] 6    | |         where F: FnMut(Self::Item) -> Option<R>
[INFO] [stderr] 7    | |     {
[INFO] [stderr] 8    | |         while let Some(elt) = self.next() {
[INFO] [stderr] ...    |
[INFO] [stderr] 13   | |         None
[INFO] [stderr] 14   | |     }
[INFO] [stderr]      | |_____^
[INFO] [stderr]      = note: candidate #2 is defined in an impl of the trait `std::iter::Iterator` for the type `std::iter::Enumerate<_>`
[INFO] [stderr] 
[INFO] [stderr]    Compiling avarice v0.3.0 (https://github.com/emallson/avarice.rs.git#2ebfeedd)
[INFO] [stderr] error: aborting due to 4 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" "e8b6463e3a6047ed8097dea0e4d0c554d9fd6143a5626217af32c3447ad5d584"`
[INFO] running `"docker" "rm" "-f" "e8b6463e3a6047ed8097dea0e4d0c554d9fd6143a5626217af32c3447ad5d584"`
[INFO] [stdout] e8b6463e3a6047ed8097dea0e4d0c554d9fd6143a5626217af32c3447ad5d584