[INFO] updating cached repository https://github.com/Sach97/dagr
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e11815cc75e80648fb382a6a18fff7a4d42c34d5
[INFO] checking Sach97/dagr against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSach97%2Fdagr" "/workspace/builds/worker-13/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Sach97/dagr on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Sach97/dagr
[INFO] finished tweaking git repo https://github.com/Sach97/dagr
[INFO] tweaked toml for git repo https://github.com/Sach97/dagr written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/Sach97/dagr already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=forbid" "-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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 733ab99f2b29b7cb03ccfe71f69c8b1deec91dcff45eeebdf3f63d56e91c77b1
[INFO] running `"docker" "start" "-a" "733ab99f2b29b7cb03ccfe71f69c8b1deec91dcff45eeebdf3f63d56e91c77b1"`
[INFO] [stderr]     Checking fixedbitset v0.1.9
[INFO] [stderr]     Checking ordermap v0.3.5
[INFO] [stderr]     Checking petgraph v0.4.13
[INFO] [stderr]     Checking daggy v0.6.0 (https://github.com/mitchmindtree/daggy#bcb36c7b)
[INFO] [stderr]     Checking dagr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused imports: `EdgeRef`, `IntoEdgeReferences`, `IntoEdges`
[INFO] [stderr]  --> src/lib.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 |     EdgeRef, IntoEdgeReferences, IntoEdges, IntoNodeReferences, NodeIndexable,
[INFO] [stderr]   |     ^^^^^^^  ^^^^^^^^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `EdgeIndex`, `Parents`
[INFO] [stderr]  --> src/lib.rs:4:24
[INFO] [stderr]   |
[INFO] [stderr] 4 | use daggy::stabledag::{EdgeIndex, NodeIndex, Parents, StableDag, Walker};
[INFO] [stderr]   |                        ^^^^^^^^^             ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `EdgeRef`, `IntoEdgeReferences`, `IntoEdges`
[INFO] [stderr]  --> src/lib.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 |     EdgeRef, IntoEdgeReferences, IntoEdges, IntoNodeReferences, NodeIndexable,
[INFO] [stderr]   |     ^^^^^^^  ^^^^^^^^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `EdgeIndex`, `Parents`
[INFO] [stderr]  --> src/lib.rs:4:24
[INFO] [stderr]   |
[INFO] [stderr] 4 | use daggy::stabledag::{EdgeIndex, NodeIndex, Parents, StableDag, Walker};
[INFO] [stderr]   |                        ^^^^^^^^^             ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `child3`
[INFO] [stderr]    --> src/lib.rs:104:13
[INFO] [stderr]     |
[INFO] [stderr] 104 |         let child3 = child_walker.walk_next(&self.dag).map(|(e, _)| e).unwrap();
[INFO] [stderr]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_child3`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `child3`
[INFO] [stderr]    --> src/lib.rs:104:13
[INFO] [stderr]     |
[INFO] [stderr] 104 |         let child3 = child_walker.walk_next(&self.dag).map(|(e, _)| e).unwrap();
[INFO] [stderr]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_child3`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/lib.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 | /         self.dag.add_edge(
[INFO] [stderr] 72 | |             NodeIndex::new(idx1),
[INFO] [stderr] 73 | |             NodeIndex::new(idx2),
[INFO] [stderr] 74 | |             relationship.to_owned(),
[INFO] [stderr] 75 | |         );
[INFO] [stderr]    | |__________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/lib.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 | /         self.dag.add_edge(
[INFO] [stderr] 72 | |             NodeIndex::new(idx1),
[INFO] [stderr] 73 | |             NodeIndex::new(idx2),
[INFO] [stderr] 74 | |             relationship.to_owned(),
[INFO] [stderr] 75 | |         );
[INFO] [stderr]    | |__________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.51s
[INFO] running `"docker" "inspect" "733ab99f2b29b7cb03ccfe71f69c8b1deec91dcff45eeebdf3f63d56e91c77b1"`
[INFO] running `"docker" "rm" "-f" "733ab99f2b29b7cb03ccfe71f69c8b1deec91dcff45eeebdf3f63d56e91c77b1"`
[INFO] [stdout] 733ab99f2b29b7cb03ccfe71f69c8b1deec91dcff45eeebdf3f63d56e91c77b1