[INFO] updating cached repository https://github.com/gnuvince/vardel
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 289e22b73869e5ee453f59c34d76b390ab33dc91
[INFO] checking gnuvince/vardel against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgnuvince%2Fvardel" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gnuvince/vardel on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/gnuvince/vardel
[INFO] finished tweaking git repo https://github.com/gnuvince/vardel
[INFO] tweaked toml for git repo https://github.com/gnuvince/vardel written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/gnuvince/vardel already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] a73cb88408d039438bdaae52691b571fd3b2e631aa4097d3ccfbacbffa6bb4bc
[INFO] running `"docker" "start" "-a" "a73cb88408d039438bdaae52691b571fd3b2e631aa4097d3ccfbacbffa6bb4bc"`
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]     Checking bit-vec v0.5.1
[INFO] [stderr]     Checking assert_matches v1.3.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking bit-set v0.5.1
[INFO] [stderr]     Checking tempfile v3.0.7
[INFO] [stderr]     Checking rusty-fork v0.2.2
[INFO] [stderr]     Checking proptest v0.9.2
[INFO] [stderr]     Checking vardel v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/lib.rs:88:1
[INFO] [stderr]    |
[INFO] [stderr] 88 | / /// Decodes a slice of bytes into a vector of u64s, `v`.
[INFO] [stderr] 89 | | /// Returns `Some(v)` if all digits could be successfully decoded,
[INFO] [stderr] 90 | | /// and `None` if one digit was ill-formed.
[INFO] [stderr]    | |___________________________________________^
[INFO] [stderr] 91 | 
[INFO] [stderr] 92 |   encoder!(encode_u64, u64);
[INFO] [stderr]    |   -------------------------- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufRead`, `self`
[INFO] [stderr]  --> src/main.rs:2:15
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{self, BufRead};
[INFO] [stderr]   |               ^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Duration`, `Instant`
[INFO] [stderr]  --> src/main.rs:3:17
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::time::{Duration, Instant};
[INFO] [stderr]   |                 ^^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `binary`
[INFO] [stderr]  --> src/main.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | fn binary(v: &[u8], n: usize) {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/lib.rs:88:1
[INFO] [stderr]    |
[INFO] [stderr] 88 | / /// Decodes a slice of bytes into a vector of u64s, `v`.
[INFO] [stderr] 89 | | /// Returns `Some(v)` if all digits could be successfully decoded,
[INFO] [stderr] 90 | | /// and `None` if one digit was ill-formed.
[INFO] [stderr]    | |___________________________________________^
[INFO] [stderr] 91 | 
[INFO] [stderr] 92 |   encoder!(encode_u64, u64);
[INFO] [stderr]    |   -------------------------- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufRead`, `self`
[INFO] [stderr]  --> src/main.rs:2:15
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{self, BufRead};
[INFO] [stderr]   |               ^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Duration`, `Instant`
[INFO] [stderr]  --> src/main.rs:3:17
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::time::{Duration, Instant};
[INFO] [stderr]   |                 ^^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `binary`
[INFO] [stderr]  --> src/main.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | fn binary(v: &[u8], n: usize) {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.70s
[INFO] running `"docker" "inspect" "a73cb88408d039438bdaae52691b571fd3b2e631aa4097d3ccfbacbffa6bb4bc"`
[INFO] running `"docker" "rm" "-f" "a73cb88408d039438bdaae52691b571fd3b2e631aa4097d3ccfbacbffa6bb4bc"`
[INFO] [stdout] a73cb88408d039438bdaae52691b571fd3b2e631aa4097d3ccfbacbffa6bb4bc