[INFO] fetching crate graph-algo-ptas 0.1.0...
[INFO] checking graph-algo-ptas-0.1.0 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate graph-algo-ptas 0.1.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate graph-algo-ptas 0.1.0 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate graph-algo-ptas 0.1.0
[INFO] finished tweaking crates.io crate graph-algo-ptas 0.1.0
[INFO] tweaked toml for crates.io crate graph-algo-ptas 0.1.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate crates.io crate graph-algo-ptas 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 855eb0313c3cc32c289d03f6ba5f87ae8cf54a56bcd076c871c619220801e2d0
[INFO] running `Command { std: "docker" "start" "-a" "855eb0313c3cc32c289d03f6ba5f87ae8cf54a56bcd076c871c619220801e2d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "855eb0313c3cc32c289d03f6ba5f87ae8cf54a56bcd076c871c619220801e2d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "855eb0313c3cc32c289d03f6ba5f87ae8cf54a56bcd076c871c619220801e2d0", kill_on_drop: false }`
[INFO] [stdout] 855eb0313c3cc32c289d03f6ba5f87ae8cf54a56bcd076c871c619220801e2d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bfcae82bbc0db0dfb7b6f797e51928b8ed4e03812be9fe9a772f9dd00696e3e5
[INFO] running `Command { std: "docker" "start" "-a" "bfcae82bbc0db0dfb7b6f797e51928b8ed4e03812be9fe9a772f9dd00696e3e5", kill_on_drop: false }`
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[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling serde v1.0.143
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[INFO] [stderr]    Compiling num-bigint v0.4.3
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[INFO] [stderr]     Checking graph-algo-ptas v0.1.0 (/opt/rustwide/workdir)
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[INFO] [stdout] warning: unused return value of `must_use` that must be used
[INFO] [stdout]    --> src/data_structure/link_graph.rs:800:9
[INFO] [stdout]     |
[INFO] [stdout] 800 |         format!("{:?}", vertex);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `must_use` that must be used
[INFO] [stdout]    --> src/data_structure/link_graph.rs:801:9
[INFO] [stdout]     |
[INFO] [stdout] 801 |         format!("{:?}", dart);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `must_use` that must be used
[INFO] [stdout]    --> src/data_structure/link_graph.rs:802:9
[INFO] [stdout]     |
[INFO] [stdout] 802 |         format!("{:?}", face);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.35s
[INFO] running `Command { std: "docker" "inspect" "bfcae82bbc0db0dfb7b6f797e51928b8ed4e03812be9fe9a772f9dd00696e3e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfcae82bbc0db0dfb7b6f797e51928b8ed4e03812be9fe9a772f9dd00696e3e5", kill_on_drop: false }`
[INFO] [stdout] bfcae82bbc0db0dfb7b6f797e51928b8ed4e03812be9fe9a772f9dd00696e3e5