[INFO] cloning repository https://github.com/twick00/jgraph
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/twick00/jgraph" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftwick00%2Fjgraph"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftwick00%2Fjgraph'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6f0181fbdf13d9c402df0761172500bec7355eca
[INFO] checking twick00/jgraph against master#bd0bacc694d7d8175804bb6f690cb846bfa4a9ee for pr-71665
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftwick00%2Fjgraph" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/twick00/jgraph on toolchain bd0bacc694d7d8175804bb6f690cb846bfa4a9ee
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/twick00/jgraph
[INFO] finished tweaking git repo https://github.com/twick00/jgraph
[INFO] tweaked toml for git repo https://github.com/twick00/jgraph written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/twick00/jgraph already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 9591ccd8ac9e3eb1fefdfff6fc70a1f67130f3f16524d5df6cf0f30ec1b69cb4
[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" "9591ccd8ac9e3eb1fefdfff6fc70a1f67130f3f16524d5df6cf0f30ec1b69cb4"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]     Checking boxfnonce v0.1.1
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking serde_json v1.0.51
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling proc-macro-crate v0.1.4
[INFO] [stderr]    Compiling function_name-proc-macro v0.2.0
[INFO] [stderr]     Checking function_name v0.2.0
[INFO] [stderr]     Checking jgraph v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::any::Any`
[INFO] [stderr]  --> src/lib.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::any::Any;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::any::Any`
[INFO] [stderr]  --> src/lib.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::any::Any;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `has_mutated`
[INFO] [stderr]   --> src/lib.rs:39:25
[INFO] [stderr]    |
[INFO] [stderr] 39 |         let (new_value, has_mutated) = (customizer.mutation)(value);
[INFO] [stderr]    |                         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_has_mutated`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     mut node: Value,
[INFO] [stderr]    |     ----^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let mut counter = 1;
[INFO] [stderr]    |         ----^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     mut node: Value,
[INFO] [stderr]    |     ----^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     mut loop_counter: i32,
[INFO] [stderr]    |     ----^^^^^^^^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `has_mutated`
[INFO] [stderr]   --> src/lib.rs:39:25
[INFO] [stderr]    |
[INFO] [stderr] 39 |         let (new_value, has_mutated) = (customizer.mutation)(value);
[INFO] [stderr]    |                         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_has_mutated`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     mut node: Value,
[INFO] [stderr]    |     ----^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let mut counter = 1;
[INFO] [stderr]    |         ----^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     mut node: Value,
[INFO] [stderr]    |     ----^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     mut loop_counter: i32,
[INFO] [stderr]    |     ----^^^^^^^^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BorrowMut`, `Borrow`
[INFO] [stderr]  --> src/main.rs:1:19
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::borrow::{Borrow, BorrowMut};
[INFO] [stderr]   |                   ^^^^^^  ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BorrowMut`, `Borrow`
[INFO] [stderr]  --> src/main.rs:1:19
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::borrow::{Borrow, BorrowMut};
[INFO] [stderr]   |                   ^^^^^^  ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 42.02s
[INFO] running `"docker" "inspect" "9591ccd8ac9e3eb1fefdfff6fc70a1f67130f3f16524d5df6cf0f30ec1b69cb4"`
[INFO] running `"docker" "rm" "-f" "9591ccd8ac9e3eb1fefdfff6fc70a1f67130f3f16524d5df6cf0f30ec1b69cb4"`
[INFO] [stdout] 9591ccd8ac9e3eb1fefdfff6fc70a1f67130f3f16524d5df6cf0f30ec1b69cb4