[INFO] updating cached repository https://github.com/aep/zz
[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] 4a155a868c24ea6bc007d2f11c8220ceb0ece19c
[INFO] checking aep/zz against master#73f76b74efcaf21bd5424d87c66cd6ed7fe5c7de for pr-68325
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faep%2Fzz" "/workspace/builds/worker-11/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aep/zz on toolchain 73f76b74efcaf21bd5424d87c66cd6ed7fe5c7de
[INFO] running `"/workspace/cargo-home/bin/cargo" "+73f76b74efcaf21bd5424d87c66cd6ed7fe5c7de" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/aep/zz
[INFO] finished tweaking git repo https://github.com/aep/zz
[INFO] tweaked toml for git repo https://github.com/aep/zz written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/aep/zz already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+73f76b74efcaf21bd5424d87c66cd6ed7fe5c7de" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+73f76b74efcaf21bd5424d87c66cd6ed7fe5c7de" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 9d16187b33c100c7d228cf4f657f8f16fd8c93decbddd22a1e4098988574e2a8
[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" "9d16187b33c100c7d228cf4f657f8f16fd8c93decbddd22a1e4098988574e2a8"`
[INFO] [stderr]    Compiling syn v0.15.36
[INFO] [stderr]    Compiling ucd-trie v0.1.1
[INFO] [stderr]    Compiling maplit v1.0.1
[INFO] [stderr]    Compiling rayon-core v1.5.0
[INFO] [stderr]     Checking seahash v3.0.6
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling fasthash-sys v0.3.2
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]     Checking xoroshiro128 v0.3.0
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking pbr v1.0.1
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking env_logger v0.6.1
[INFO] [stderr]     Checking pest v2.1.1
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking crossbeam-deque v0.6.3
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]     Checking error-chain v0.12.1
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking which v3.1.0
[INFO] [stderr]     Checking rsmt2-zz v0.11.0
[INFO] [stderr]     Checking rayon v1.1.0
[INFO] [stderr]    Compiling pest_meta v2.1.1
[INFO] [stderr]    Compiling pest_generator v2.1.0
[INFO] [stderr]     Checking fasthash v0.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]     Checking serde v1.0.92
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking toml v0.5.1
[INFO] [stderr]     Checking zz v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]     --> src/symbolic.rs:2034:30
[INFO] [stderr]      |
[INFO] [stderr] 2034 |                         for (i, arg) in args.iter_mut().enumerate() {
[INFO] [stderr]      |                              ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]    --> src/expand.rs:109:32
[INFO] [stderr]     |
[INFO] [stderr] 109 |             ast::Def::Function{args, callassert, callattests, calleffect, ..} => {
[INFO] [stderr]     |                                ^^^^ help: try ignoring the field: `args: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `callassert`
[INFO] [stderr]    --> src/expand.rs:109:38
[INFO] [stderr]     |
[INFO] [stderr] 109 |             ast::Def::Function{args, callassert, callattests, calleffect, ..} => {
[INFO] [stderr]     |                                      ^^^^^^^^^^ help: try ignoring the field: `callassert: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `callattests`
[INFO] [stderr]    --> src/expand.rs:109:50
[INFO] [stderr]     |
[INFO] [stderr] 109 |             ast::Def::Function{args, callassert, callattests, calleffect, ..} => {
[INFO] [stderr]     |                                                  ^^^^^^^^^^^ help: try ignoring the field: `callattests: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `calleffect`
[INFO] [stderr]    --> src/expand.rs:109:63
[INFO] [stderr]     |
[INFO] [stderr] 109 |             ast::Def::Function{args, callassert, callattests, calleffect, ..} => {
[INFO] [stderr]     |                                                               ^^^^^^^^^^ help: try ignoring the field: `calleffect: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]     --> src/symbolic.rs:2034:30
[INFO] [stderr]      |
[INFO] [stderr] 2034 |                         for (i, arg) in args.iter_mut().enumerate() {
[INFO] [stderr]      |                              ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]    --> src/expand.rs:109:32
[INFO] [stderr]     |
[INFO] [stderr] 109 |             ast::Def::Function{args, callassert, callattests, calleffect, ..} => {
[INFO] [stderr]     |                                ^^^^ help: try ignoring the field: `args: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `callassert`
[INFO] [stderr]    --> src/expand.rs:109:38
[INFO] [stderr]     |
[INFO] [stderr] 109 |             ast::Def::Function{args, callassert, callattests, calleffect, ..} => {
[INFO] [stderr]     |                                      ^^^^^^^^^^ help: try ignoring the field: `callassert: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `callattests`
[INFO] [stderr]    --> src/expand.rs:109:50
[INFO] [stderr]     |
[INFO] [stderr] 109 |             ast::Def::Function{args, callassert, callattests, calleffect, ..} => {
[INFO] [stderr]     |                                                  ^^^^^^^^^^^ help: try ignoring the field: `callattests: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `calleffect`
[INFO] [stderr]    --> src/expand.rs:109:63
[INFO] [stderr]     |
[INFO] [stderr] 109 |             ast::Def::Function{args, callassert, callattests, calleffect, ..} => {
[INFO] [stderr]     |                                                               ^^^^^^^^^^ help: try ignoring the field: `calleffect: _`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/abs.rs:594:9
[INFO] [stderr]     |
[INFO] [stderr] 594 |     let mut newimports = Vec::new();
[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/abs.rs:594:9
[INFO] [stderr]     |
[INFO] [stderr] 594 |     let mut newimports = Vec::new();
[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: unused import: `Duration`
[INFO] [stderr]   --> src/main.rs:13:17
[INFO] [stderr]    |
[INFO] [stderr] 13 | use std::time::{Duration, Instant};
[INFO] [stderr]    |                 ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Duration`
[INFO] [stderr]   --> src/main.rs:13:17
[INFO] [stderr]    |
[INFO] [stderr] 13 | use std::time::{Duration, Instant};
[INFO] [stderr]    |                 ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 20s
[INFO] running `"docker" "inspect" "9d16187b33c100c7d228cf4f657f8f16fd8c93decbddd22a1e4098988574e2a8"`
[INFO] running `"docker" "rm" "-f" "9d16187b33c100c7d228cf4f657f8f16fd8c93decbddd22a1e4098988574e2a8"`
[INFO] [stdout] 9d16187b33c100c7d228cf4f657f8f16fd8c93decbddd22a1e4098988574e2a8