[INFO] cloning repository https://github.com/BookOwl/type-inference
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/BookOwl/type-inference" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBookOwl%2Ftype-inference", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBookOwl%2Ftype-inference'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b1b68f9a1ee173754585a1c532270f0c21c69a07
[INFO] testing BookOwl/type-inference against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBookOwl%2Ftype-inference" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/BookOwl/type-inference on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/BookOwl/type-inference
[INFO] finished tweaking git repo https://github.com/BookOwl/type-inference
[INFO] tweaked toml for git repo https://github.com/BookOwl/type-inference written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/BookOwl/type-inference already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded regex-syntax v0.4.1
[INFO] [stderr]   Downloaded ordermap v0.2.13
[INFO] [stderr]   Downloaded lalrpop-intern v0.13.1
[INFO] [stderr]   Downloaded atty v0.1.2
[INFO] [stderr]   Downloaded memchr v1.0.1
[INFO] [stderr]   Downloaded ena v0.5.0
[INFO] [stderr]   Downloaded lalrpop-snap v0.13.1
[INFO] [stderr]   Downloaded regex v0.2.2
[INFO] [stderr]   Downloaded fixedbitset v0.1.8
[INFO] [stderr]   Downloaded lalrpop v0.13.1
[INFO] [stderr]   Downloaded lalrpop-util v0.13.1
[INFO] [stderr]   Downloaded lazy_static v0.2.9
[INFO] [stderr]   Downloaded aho-corasick v0.6.3
[INFO] [stderr]   Downloaded diff v0.1.10
[INFO] [stderr]   Downloaded either v1.2.0
[INFO] [stderr]   Downloaded libc v0.2.31
[INFO] [stderr]   Downloaded petgraph v0.4.9
[INFO] running `Command { std: "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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3ab47fadf34a3fc85bdeacb711bc72b52dd030d30d584ea5a08a86c49ac5c4f5
[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" "3ab47fadf34a3fc85bdeacb711bc72b52dd030d30d584ea5a08a86c49ac5c4f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3ab47fadf34a3fc85bdeacb711bc72b52dd030d30d584ea5a08a86c49ac5c4f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ab47fadf34a3fc85bdeacb711bc72b52dd030d30d584ea5a08a86c49ac5c4f5", kill_on_drop: false }`
[INFO] [stdout] 3ab47fadf34a3fc85bdeacb711bc72b52dd030d30d584ea5a08a86c49ac5c4f5
[INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f43b847232695a09e7f52942db6f873ddc88afbda8e8111b9ad0b6d557634393
[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" "f43b847232695a09e7f52942db6f873ddc88afbda8e8111b9ad0b6d557634393", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.31
[INFO] [stderr]    Compiling lazy_static v0.2.9
[INFO] [stderr]    Compiling regex-syntax v0.4.1
[INFO] [stderr]    Compiling utf8-ranges v1.0.0
[INFO] [stderr]    Compiling bit-vec v0.4.4
[INFO] [stderr]    Compiling ordermap v0.2.13
[INFO] [stderr]    Compiling fixedbitset v0.1.8
[INFO] [stderr]    Compiling either v1.2.0
[INFO] [stderr]    Compiling term v0.4.6
[INFO] [stderr]    Compiling lalrpop-intern v0.13.1
[INFO] [stderr]    Compiling lalrpop-util v0.13.1
[INFO] [stderr]    Compiling ena v0.5.0
[INFO] [stderr]    Compiling diff v0.1.10
[INFO] [stderr]    Compiling itertools v0.5.10
[INFO] [stderr]    Compiling thread_local v0.3.4
[INFO] [stderr]    Compiling bit-set v0.4.0
[INFO] [stderr]    Compiling memchr v1.0.1
[INFO] [stderr]    Compiling atty v0.1.2
[INFO] [stderr]    Compiling ascii-canvas v1.0.0
[INFO] [stderr]    Compiling petgraph v0.4.9
[INFO] [stderr]    Compiling aho-corasick v0.6.3
[INFO] [stderr]    Compiling regex v0.2.2
[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.9/src/graph_impl/stable_graph/mod.rs:1172:19
[INFO] [stdout]      |
[INFO] [stdout] 1172 |         self.iter.find_map(|(i, node)| {
[INFO] [stdout]      |                   ^^^^^^^^ multiple `find_map` found
[INFO] [stdout]      |
[INFO] [stdout] note: candidate #1 is defined in an impl of the trait `IterUtilsExt` for the type `I`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.9/src/iter_utils.rs:5:5
[INFO] [stdout]      |
[INFO] [stdout] 5    | /     fn find_map<F, R>(&mut self, mut f: F) -> Option<R>
[INFO] [stdout] 6    | |         where F: FnMut(Self::Item) -> Option<R>
[INFO] [stdout]      | |_______________________________________________^
[INFO] [stdout]      = note: candidate #2 is defined in an impl of the trait `Iterator` for the type `Enumerate<I>`
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]      |
[INFO] [stdout] 1172 ~         IterUtilsExt::find_map(&mut self.iter, |(i, node)| {
[INFO] [stdout] 1173 +             node.weight.as_ref().map(move |w| (node_index(i), w))
[INFO] [stdout] 1174 +         })
[INFO] [stdout]      |
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]      |
[INFO] [stdout] 1172 ~         Iterator::find_map(&mut self.iter, |(i, node)| {
[INFO] [stdout] 1173 +             node.weight.as_ref().map(move |w| (node_index(i), w))
[INFO] [stdout] 1174 +         })
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.9/src/graph_impl/stable_graph/mod.rs:1355:19
[INFO] [stdout]      |
[INFO] [stdout] 1355 |         self.iter.find_map(|(i, edge)|
[INFO] [stdout]      |                   ^^^^^^^^ multiple `find_map` found
[INFO] [stdout]      |
[INFO] [stdout] note: candidate #1 is defined in an impl of the trait `IterUtilsExt` for the type `I`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.9/src/iter_utils.rs:5:5
[INFO] [stdout]      |
[INFO] [stdout] 5    | /     fn find_map<F, R>(&mut self, mut f: F) -> Option<R>
[INFO] [stdout] 6    | |         where F: FnMut(Self::Item) -> Option<R>
[INFO] [stdout]      | |_______________________________________________^
[INFO] [stdout]      = note: candidate #2 is defined in an impl of the trait `Iterator` for the type `Enumerate<I>`
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]      |
[INFO] [stdout] 1355 ~         IterUtilsExt::find_map(&mut self.iter, |(i, edge)|
[INFO] [stdout] 1356 +             edge.weight.as_ref().map(move |weight| {
[INFO] [stdout] 1357 +                 EdgeReference {
[INFO] [stdout] 1358 +                     index: edge_index(i),
[INFO] [stdout] 1359 +                     node: edge.node,
[INFO] [stdout] 1360 +                     weight: weight,
[INFO] [stdout]    ...
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]      |
[INFO] [stdout] 1355 ~         Iterator::find_map(&mut self.iter, |(i, edge)|
[INFO] [stdout] 1356 +             edge.weight.as_ref().map(move |weight| {
[INFO] [stdout] 1357 +                 EdgeReference {
[INFO] [stdout] 1358 +                     index: edge_index(i),
[INFO] [stdout] 1359 +                     node: edge.node,
[INFO] [stdout] 1360 +                     weight: weight,
[INFO] [stdout]    ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.9/src/graph_impl/stable_graph/mod.rs:1519:19
[INFO] [stdout]      |
[INFO] [stdout] 1519 |         self.iter.find_map(|(i, node)| {
[INFO] [stdout]      |                   ^^^^^^^^ multiple `find_map` found
[INFO] [stdout]      |
[INFO] [stdout] note: candidate #1 is defined in an impl of the trait `IterUtilsExt` for the type `I`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.9/src/iter_utils.rs:5:5
[INFO] [stdout]      |
[INFO] [stdout] 5    | /     fn find_map<F, R>(&mut self, mut f: F) -> Option<R>
[INFO] [stdout] 6    | |         where F: FnMut(Self::Item) -> Option<R>
[INFO] [stdout]      | |_______________________________________________^
[INFO] [stdout]      = note: candidate #2 is defined in an impl of the trait `Iterator` for the type `Enumerate<I>`
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]      |
[INFO] [stdout] 1519 ~         IterUtilsExt::find_map(&mut self.iter, |(i, node)| {
[INFO] [stdout] 1520 +             if node.weight.is_some() {
[INFO] [stdout] 1521 +                 Some(node_index(i))
[INFO] [stdout] 1522 +             } else { None }
[INFO] [stdout] 1523 +         })
[INFO] [stdout]      |
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]      |
[INFO] [stdout] 1519 ~         Iterator::find_map(&mut self.iter, |(i, node)| {
[INFO] [stdout] 1520 +             if node.weight.is_some() {
[INFO] [stdout] 1521 +                 Some(node_index(i))
[INFO] [stdout] 1522 +             } else { None }
[INFO] [stdout] 1523 +         })
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.9/src/graph_impl/stable_graph/mod.rs:1565:19
[INFO] [stdout]      |
[INFO] [stdout] 1565 |         self.iter.find_map(|(i, node)| {
[INFO] [stdout]      |                   ^^^^^^^^ multiple `find_map` found
[INFO] [stdout]      |
[INFO] [stdout] note: candidate #1 is defined in an impl of the trait `IterUtilsExt` for the type `I`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/petgraph-0.4.9/src/iter_utils.rs:5:5
[INFO] [stdout]      |
[INFO] [stdout] 5    | /     fn find_map<F, R>(&mut self, mut f: F) -> Option<R>
[INFO] [stdout] 6    | |         where F: FnMut(Self::Item) -> Option<R>
[INFO] [stdout]      | |_______________________________________________^
[INFO] [stdout]      = note: candidate #2 is defined in an impl of the trait `Iterator` for the type `Enumerate<I>`
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]      |
[INFO] [stdout] 1565 ~         IterUtilsExt::find_map(&mut self.iter, |(i, node)| {
[INFO] [stdout] 1566 +             if node.weight.is_some() {
[INFO] [stdout] 1567 +                 Some(edge_index(i))
[INFO] [stdout] 1568 +             } else { None }
[INFO] [stdout] 1569 +         })
[INFO] [stdout]      |
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]      |
[INFO] [stdout] 1565 ~         Iterator::find_map(&mut self.iter, |(i, node)| {
[INFO] [stdout] 1566 +             if node.weight.is_some() {
[INFO] [stdout] 1567 +                 Some(edge_index(i))
[INFO] [stdout] 1568 +             } else { None }
[INFO] [stdout] 1569 +         })
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `petgraph` due to 5 previous errors
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0034`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f43b847232695a09e7f52942db6f873ddc88afbda8e8111b9ad0b6d557634393", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f43b847232695a09e7f52942db6f873ddc88afbda8e8111b9ad0b6d557634393", kill_on_drop: false }`
[INFO] [stdout] f43b847232695a09e7f52942db6f873ddc88afbda8e8111b9ad0b6d557634393