[INFO] fetching crate r-graph 0.1.3...
[INFO] checking r-graph-0.1.3 against master#914adf04af1c1a984707f778da3d04590c03d144 for pr-72331
[INFO] extracting crate r-graph 0.1.3 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate r-graph 0.1.3 on toolchain 914adf04af1c1a984707f778da3d04590c03d144
[INFO] running `"/workspace/cargo-home/bin/cargo" "+914adf04af1c1a984707f778da3d04590c03d144" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate r-graph 0.1.3
[INFO] finished tweaking crates.io crate r-graph 0.1.3
[INFO] tweaked toml for crates.io crate r-graph 0.1.3 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+914adf04af1c1a984707f778da3d04590c03d144" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+914adf04af1c1a984707f778da3d04590c03d144" "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=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" "+914adf04af1c1a984707f778da3d04590c03d144" "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] 640acd1b0b89b0dd39dcadf195a63ad72fe1af051f66b46525551ad2a73ea222
[INFO] running `"docker" "start" "-a" "640acd1b0b89b0dd39dcadf195a63ad72fe1af051f66b46525551ad2a73ea222"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking r-graph v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `Dot`
[INFO] [stderr]  --> src/wrapper/transaction.rs:2:29
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::dev::{AddVertex, Dot, RemoveEdge, RemoveVertex};
[INFO] [stderr]   |                             ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::wrapper::logger::Logger`
[INFO] [stderr]  --> src/wrapper/transaction.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::wrapper::logger::Logger;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Dot`
[INFO] [stderr]  --> src/wrapper/transaction.rs:2:29
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::dev::{AddVertex, Dot, RemoveEdge, RemoveVertex};
[INFO] [stderr]   |                             ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::wrapper::logger::Logger`
[INFO] [stderr]  --> src/wrapper/transaction.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::wrapper::logger::Logger;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `commit`
[INFO] [stderr]   --> src/wrapper/transaction.rs:27:12
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn commit(self) -> Graph {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `commit`
[INFO] [stderr]   --> src/wrapper/transaction.rs:27:12
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn commit(self) -> Graph {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/wrapper/logger.rs:269:9
[INFO] [stderr]     |
[INFO] [stderr] 269 |         graph.add_vertex((0, ()));
[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]     Finished dev [unoptimized + debuginfo] target(s) in 6.67s
[INFO] running `"docker" "inspect" "640acd1b0b89b0dd39dcadf195a63ad72fe1af051f66b46525551ad2a73ea222"`
[INFO] running `"docker" "rm" "-f" "640acd1b0b89b0dd39dcadf195a63ad72fe1af051f66b46525551ad2a73ea222"`
[INFO] [stdout] 640acd1b0b89b0dd39dcadf195a63ad72fe1af051f66b46525551ad2a73ea222