[INFO] fetching crate petgraph-evcxr 0.1.1...
[INFO] checking petgraph-evcxr-0.1.1 against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] extracting crate petgraph-evcxr 0.1.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate petgraph-evcxr 0.1.1 on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate petgraph-evcxr 0.1.1
[INFO] finished tweaking crates.io crate petgraph-evcxr 0.1.1
[INFO] tweaked toml for crates.io crate petgraph-evcxr 0.1.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 48cefaef84a973b0c71f156c2c674d270fba94efc34af4a36e8d74e9161133a5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "48cefaef84a973b0c71f156c2c674d270fba94efc34af4a36e8d74e9161133a5"`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking base64 v0.12.0
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]     Checking petgraph v0.5.0
[INFO] [stderr]     Checking petgraph-evcxr v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `Display`
[INFO] [stderr]  --> src/lib.rs:3:22
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::fmt::{self, Display};
[INFO] [stderr]   |                      ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]  --> src/lib.rs:4:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::{self, Write};
[INFO] [stderr]   |               ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Data`, `NodeRef`
[INFO] [stderr]  --> src/lib.rs:9:30
[INFO] [stderr]   |
[INFO] [stderr] 9 | use crate::petgraph::visit::{Data, GraphProp, NodeRef};
[INFO] [stderr]   |                              ^^^^             ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `EdgeRef`
[INFO] [stderr]   --> src/lib.rs:10:30
[INFO] [stderr]    |
[INFO] [stderr] 10 | use crate::petgraph::visit::{EdgeRef, IntoEdgeReferences, IntoNodeReferences, NodeIndexable};
[INFO] [stderr]    |                              ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `petgraph::graph::Graph`
[INFO] [stderr]   --> src/lib.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use petgraph::graph::Graph;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Display`
[INFO] [stderr]  --> src/lib.rs:3:22
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::fmt::{self, Display};
[INFO] [stderr]   |                      ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]  --> src/lib.rs:4:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::{self, Write};
[INFO] [stderr]   |               ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Data`, `NodeRef`
[INFO] [stderr]  --> src/lib.rs:9:30
[INFO] [stderr]   |
[INFO] [stderr] 9 | use crate::petgraph::visit::{Data, GraphProp, NodeRef};
[INFO] [stderr]   |                              ^^^^             ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `EdgeRef`
[INFO] [stderr]   --> src/lib.rs:10:30
[INFO] [stderr]    |
[INFO] [stderr] 10 | use crate::petgraph::visit::{EdgeRef, IntoEdgeReferences, IntoNodeReferences, NodeIndexable};
[INFO] [stderr]    |                              ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `petgraph::graph::Graph`
[INFO] [stderr]   --> src/lib.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use petgraph::graph::Graph;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/lib.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 | /     child
[INFO] [stderr] 36 | |         .stdin
[INFO] [stderr] 37 | |         .as_mut()
[INFO] [stderr] 38 | |         .unwrap()
[INFO] [stderr] 39 | |         .write_fmt(format_args!("{}", dot));
[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: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/lib.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 | /     child
[INFO] [stderr] 36 | |         .stdin
[INFO] [stderr] 37 | |         .as_mut()
[INFO] [stderr] 38 | |         .unwrap()
[INFO] [stderr] 39 | |         .write_fmt(format_args!("{}", dot));
[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: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.56s
[INFO] running `"docker" "inspect" "48cefaef84a973b0c71f156c2c674d270fba94efc34af4a36e8d74e9161133a5"`
[INFO] running `"docker" "rm" "-f" "48cefaef84a973b0c71f156c2c674d270fba94efc34af4a36e8d74e9161133a5"`
[INFO] [stdout] 48cefaef84a973b0c71f156c2c674d270fba94efc34af4a36e8d74e9161133a5