[INFO] fetching crate mrgraph 0.0.4...
[INFO] checking mrgraph-0.0.4 against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] extracting crate mrgraph 0.0.4 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate mrgraph 0.0.4
[INFO] finished tweaking crates.io crate mrgraph 0.0.4
[INFO] tweaked toml for crates.io crate mrgraph 0.0.4 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mrgraph 0.0.4 on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mrgraph 0.0.4 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" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thiserror-impl v1.0.58
[INFO] [stderr]   Downloaded quote v1.0.35
[INFO] [stderr]   Downloaded thiserror v1.0.58
[INFO] [stderr]   Downloaded itoa v1.0.10
[INFO] [stderr]   Downloaded either v1.10.0
[INFO] [stderr]   Downloaded csv-core v0.1.11
[INFO] [stderr]   Downloaded crc32fast v1.4.0
[INFO] [stderr]   Downloaded serde_derive v1.0.197
[INFO] [stderr]   Downloaded memchr v2.7.1
[INFO] [stderr]   Downloaded indexmap v1.9.3
[INFO] [stderr]   Downloaded serde v1.0.197
[INFO] [stderr]   Downloaded flate2 v1.0.28
[INFO] [stderr]   Downloaded hashbrown v0.12.3
[INFO] [stderr]   Downloaded itertools v0.12.1
[INFO] [stderr]   Downloaded indexmap v2.2.6
[INFO] [stderr]   Downloaded hashbrown v0.14.3
[INFO] [stderr]   Downloaded petgraph v0.6.4
[INFO] [stderr]   Downloaded meritrank2 v0.5.2
[INFO] [stderr]   Downloaded syn v2.0.53
[INFO] [stderr]   Downloaded num-traits v0.2.18
[INFO] [stderr]   Downloaded autocfg v1.1.0
[INFO] [stderr]   Downloaded fixedbitset v0.4.2
[INFO] [stderr]   Downloaded proc-macro2 v1.0.79
[INFO] [stderr]   Downloaded fixedbitset v0.2.0
[INFO] [stderr]   Downloaded ordered-float v1.1.1
[INFO] [stderr]   Downloaded equivalent v1.0.1
[INFO] [stderr]   Downloaded getrandom v0.2.12
[INFO] [stderr]   Downloaded uuid v1.8.0
[INFO] [stderr]   Downloaded csv v1.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 02ef79026f29e6b79ad79d764c1bdb458e6ec4c18ae5298815fc0dc801898db0
[INFO] running `Command { std: "docker" "start" "-a" "02ef79026f29e6b79ad79d764c1bdb458e6ec4c18ae5298815fc0dc801898db0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "02ef79026f29e6b79ad79d764c1bdb458e6ec4c18ae5298815fc0dc801898db0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02ef79026f29e6b79ad79d764c1bdb458e6ec4c18ae5298815fc0dc801898db0", kill_on_drop: false }`
[INFO] [stdout] 02ef79026f29e6b79ad79d764c1bdb458e6ec4c18ae5298815fc0dc801898db0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 16ba573434b26438b0bbfc643141c4ee82fc6ec382e22b001add861c35673efa
[INFO] running `Command { std: "docker" "start" "-a" "16ba573434b26438b0bbfc643141c4ee82fc6ec382e22b001add861c35673efa", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking uuid v1.8.0
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking petgraph v0.6.4
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]    Compiling syn v2.0.53
[INFO] [stderr]     Checking itertools v0.12.1
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking flate2 v1.0.28
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking ordered-float v1.1.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking meritrank2 v0.5.2
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]     Checking mrgraph v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut graph: &mut MyGraph = graph0.borrow_graph_mut();
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut graph: &mut MyGraph = graph0.borrow_graph_mut();
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.76s
[INFO] running `Command { std: "docker" "inspect" "16ba573434b26438b0bbfc643141c4ee82fc6ec382e22b001add861c35673efa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16ba573434b26438b0bbfc643141c4ee82fc6ec382e22b001add861c35673efa", kill_on_drop: false }`
[INFO] [stdout] 16ba573434b26438b0bbfc643141c4ee82fc6ec382e22b001add861c35673efa