[INFO] cloning repository https://github.com/Bestra/rs-stack-vm
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Bestra/rs-stack-vm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBestra%2Frs-stack-vm"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBestra%2Frs-stack-vm'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 303ee1d12979221fb9edf1d771465c3d4cb5f97e
[INFO] testing Bestra/rs-stack-vm against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBestra%2Frs-stack-vm" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Bestra/rs-stack-vm on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Bestra/rs-stack-vm
[INFO] finished tweaking git repo https://github.com/Bestra/rs-stack-vm
[INFO] tweaked toml for git repo https://github.com/Bestra/rs-stack-vm written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/Bestra/rs-stack-vm already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 361377d6daee1ff7ade23d32c60f8647bce5f624c6fc97d034ac64a6b6ceaf7f
[INFO] running `"docker" "start" "-a" "361377d6daee1ff7ade23d32c60f8647bce5f624c6fc97d034ac64a6b6ceaf7f"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.36
[INFO] [stderr]    Compiling lazy_static v1.0.0
[INFO] [stderr]    Compiling regex-syntax v0.4.2
[INFO] [stderr]    Compiling strsim v0.6.0
[INFO] [stderr]    Compiling term v0.4.6
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling bit-vec v0.4.4
[INFO] [stderr]    Compiling either v1.4.0
[INFO] [stderr]    Compiling ordermap v0.3.5
[INFO] [stderr]    Compiling fixedbitset v0.1.8
[INFO] [stderr]    Compiling num-traits v0.2.2
[INFO] [stderr]    Compiling lalrpop-intern v0.14.0
[INFO] [stderr]    Compiling lalrpop-util v0.14.0
[INFO] [stderr]    Compiling ena v0.5.0
[INFO] [stderr]    Compiling diff v0.1.11
[INFO] [stderr]    Compiling gcc v0.3.54
[INFO] [stderr]    Compiling stable_deref_trait v1.0.0
[INFO] [stderr]    Compiling array-macro v1.0.0
[INFO] [stderr]    Compiling cfg-if v0.1.2
[INFO] [stderr]    Compiling serde v1.0.34
[INFO] [stderr]    Compiling maplit v1.0.1
[INFO] [stderr]    Compiling bitflags v1.0.1
[INFO] [stderr]    Compiling vec_map v0.8.0
[INFO] [stderr]    Compiling enumset v0.3.3
[INFO] [stderr]    Compiling ansi_term v0.10.2
[INFO] [stderr]    Compiling unicode-segmentation v1.2.0
[INFO] [stderr]    Compiling xi-unicode v0.1.0
[INFO] [stderr]    Compiling rprompt v1.0.3
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling itertools v0.5.10
[INFO] [stderr]    Compiling textwrap v0.9.0
[INFO] [stderr]    Compiling log v0.4.1
[INFO] [stderr]    Compiling owning_ref v0.3.3
[INFO] [stderr]    Compiling bit-set v0.4.0
[INFO] [stderr]    Compiling ascii-canvas v1.0.0
[INFO] [stderr]    Compiling thread_local v0.3.5
[INFO] [stderr]    Compiling petgraph v0.4.11
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling atty v0.2.6
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]    Compiling num-integer v0.1.36
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling clap v2.30.0
[INFO] [stderr]    Compiling atty v0.1.2
[INFO] [stderr]    Compiling num-iter v0.1.35
[INFO] [stderr]    Compiling regex v0.2.6
[INFO] [stderr]    Compiling ncurses v5.91.0
[INFO] [stderr]    Compiling num-bigint v0.1.43
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.11/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 `I`
[INFO] [stderr]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.11/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<I>`
[INFO] [stderr] help: disambiguate the associated function for candidate #1
[INFO] [stderr]      |
[INFO] [stderr] 1173 |         iter_utils::IterUtilsExt::find_map(&mut self.iter, |(i, node)| {
[INFO] [stderr] 1174 |             node.weight.as_ref().map(move |w| (node_index(i), w))
[INFO] [stderr] 1175 |         })
[INFO] [stderr]      |
[INFO] [stderr] help: disambiguate the associated function for candidate #2
[INFO] [stderr]      |
[INFO] [stderr] 1173 |         std::iter::Iterator::find_map(&mut self.iter, |(i, node)| {
[INFO] [stderr] 1174 |             node.weight.as_ref().map(move |w| (node_index(i), w))
[INFO] [stderr] 1175 |         })
[INFO] [stderr]      |
[INFO] [stderr] 
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.11/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 `I`
[INFO] [stderr]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.11/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<I>`
[INFO] [stderr] help: disambiguate the associated function for candidate #1
[INFO] [stderr]      |
[INFO] [stderr] 1365 |         iter_utils::IterUtilsExt::find_map(&mut self.iter, |(i, edge)|
[INFO] [stderr] 1366 |             edge.weight.as_ref().map(move |weight| {
[INFO] [stderr] 1367 |                 EdgeReference {
[INFO] [stderr] 1368 |                     index: edge_index(i),
[INFO] [stderr] 1369 |                     node: edge.node,
[INFO] [stderr] 1370 |                     weight: weight,
[INFO] [stderr]    ...
[INFO] [stderr] help: disambiguate the associated function for candidate #2
[INFO] [stderr]      |
[INFO] [stderr] 1365 |         std::iter::Iterator::find_map(&mut self.iter, |(i, edge)|
[INFO] [stderr] 1366 |             edge.weight.as_ref().map(move |weight| {
[INFO] [stderr] 1367 |                 EdgeReference {
[INFO] [stderr] 1368 |                     index: edge_index(i),
[INFO] [stderr] 1369 |                     node: edge.node,
[INFO] [stderr] 1370 |                     weight: weight,
[INFO] [stderr]    ...
[INFO] [stderr] 
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.11/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 `I`
[INFO] [stderr]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.11/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<I>`
[INFO] [stderr] help: disambiguate the associated function for candidate #1
[INFO] [stderr]      |
[INFO] [stderr] 1529 |         iter_utils::IterUtilsExt::find_map(&mut self.iter, |(i, node)| {
[INFO] [stderr] 1530 |             if node.weight.is_some() {
[INFO] [stderr] 1531 |                 Some(node_index(i))
[INFO] [stderr] 1532 |             } else { None }
[INFO] [stderr] 1533 |         })
[INFO] [stderr]      |
[INFO] [stderr] help: disambiguate the associated function for candidate #2
[INFO] [stderr]      |
[INFO] [stderr] 1529 |         std::iter::Iterator::find_map(&mut self.iter, |(i, node)| {
[INFO] [stderr] 1530 |             if node.weight.is_some() {
[INFO] [stderr] 1531 |                 Some(node_index(i))
[INFO] [stderr] 1532 |             } else { None }
[INFO] [stderr] 1533 |         })
[INFO] [stderr]      |
[INFO] [stderr] 
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.11/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 `I`
[INFO] [stderr]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.11/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<I>`
[INFO] [stderr] help: disambiguate the associated function for candidate #1
[INFO] [stderr]      |
[INFO] [stderr] 1575 |         iter_utils::IterUtilsExt::find_map(&mut self.iter, |(i, node)| {
[INFO] [stderr] 1576 |             if node.weight.is_some() {
[INFO] [stderr] 1577 |                 Some(edge_index(i))
[INFO] [stderr] 1578 |             } else { None }
[INFO] [stderr] 1579 |         })
[INFO] [stderr]      |
[INFO] [stderr] help: disambiguate the associated function for candidate #2
[INFO] [stderr]      |
[INFO] [stderr] 1575 |         std::iter::Iterator::find_map(&mut self.iter, |(i, node)| {
[INFO] [stderr] 1576 |             if node.weight.is_some() {
[INFO] [stderr] 1577 |                 Some(edge_index(i))
[INFO] [stderr] 1578 |             } else { None }
[INFO] [stderr] 1579 |         })
[INFO] [stderr]      |
[INFO] [stderr] 
[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] 
[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 `"docker" "inspect" "361377d6daee1ff7ade23d32c60f8647bce5f624c6fc97d034ac64a6b6ceaf7f"`
[INFO] running `"docker" "rm" "-f" "361377d6daee1ff7ade23d32c60f8647bce5f624c6fc97d034ac64a6b6ceaf7f"`
[INFO] [stdout] 361377d6daee1ff7ade23d32c60f8647bce5f624c6fc97d034ac64a6b6ceaf7f